Difference between revisions of "ChemCollective-Virtual-Labs/C2/Preparation-of-Standard-Solutions/English"

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−
{| style="border-spacing:0;"
+
{|border=1
−
! <center>Visual Cue</center>
+
||'''Visual Cue'''
−
! <center>Narration</center>
+
||'''Narration'''
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 1'''
+
|| '''Slide Number 1'''
  
 
'''Title Slide '''
 
'''Title Slide '''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Welcome to this spoken tutorial on Preparation of Standard Solutions.
+
|| Welcome to this spoken tutorial on Preparation of Standard Solutions.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 2 '''
+
|| '''Slide Number 2 '''
  
 
'''Learning Objectives '''
 
'''Learning Objectives '''
−
 
  
 
To prepare standard solution.
 
To prepare standard solution.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial, we will learn to prepare standard solution of:  
+
|| In this tutorial, we will learn to prepare standard solution of:  
 
1 molar sodium chloride
 
1 molar sodium chloride
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 3'''
+
|| '''Slide Number 3'''
  
 
'''Pre-requisites'''
 
'''Pre-requisites'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To follow this tutorial you should be familiar with
+
|| To follow this tutorial you should be familiar with,
−
 
+
  
 
Higher secondary school Chemistry.
 
Higher secondary school Chemistry.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 4'''
+
|| '''Slide Number 4'''
  
 
'''System Requirement'''
 
'''System Requirement'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Here I am using
+
|| Here I am using
  
−
Mac OS verion 10.10.5
+
Mac OS version 10.10.5
  
 
ChemCollective Vlabs version 2.1.0
 
ChemCollective Vlabs version 2.1.0
Line 43: Line 41:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to the window.
+
|| Point to the window.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Here I have opened''' Virtual Chemistry labs''' application window.
+
|| Here I have opened '''Virtual Chemistry labs''' application window.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the '''Workbench'''
+
|| Cursor on the '''Workbench'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We will begin by preparing standard solutions from solids.
+
|| We will begin by preparing standard solutions from solids.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Go to '''File''' menu and click on '''Load homework '''option.
+
|| Go to '''File''' menu and click on '''Load homework''' option.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Go to '''File''' menu and select '''Load Homework''' option.
+
|| Go to '''File''' menu and select '''Load Homework''' option.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| A dialog box opens.
+
|| A dialog box opens.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Default Lab Setup '''dialog box opens.
+
|| '''Default Lab Setup '''dialog box opens.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| The dialog box lists a number of local problems.
+
|| The dialog box lists a number of local problems.
  
 
Select '''Molarity and Density'''
 
Select '''Molarity and Density'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The dialog box lists a number of''' Local Problems.'''
+
|| The dialog box lists a number of''' Local Problems.'''
  
 
From the list, double-click to select '''Molarity and Density'''.
 
From the list, double-click to select '''Molarity and Density'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Sub menu>> double click on '''Making solutions from solids'''
+
|| Sub menu >> double click on '''Making solutions from solids'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| From the sub menu, double-click on '''Making solutions from solids.'''
+
|| From the sub menu, double-click on '''Making solutions from solids'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the '''stockroom explorer'''
+
|| Cursor on the '''stockroom explorer'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| On the left panel,''' Stockroom explorer '''opens.  
+
|| On the left panel,''' Stockroom explorer '''opens.  
−
 
+
  
 
It displays the required solutions and the '''problem description'''.
 
It displays the required solutions and the '''problem description'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''problem description.'''  
+
|| Click on '''problem description'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Double-click on '''problem description '''icon'''.'''
+
|| Double-click on '''problem description''' icon.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| A '''problem description''' window opens
+
|| A '''problem description''' window opens.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| A '''problem description''' window opens next to the '''Workbench'''.
+
|| A '''problem description''' window opens next to the '''Workbench'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Hover the mouse on the window
+
|| Hover the mouse on the window.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The window briefly describes list of problems you need to solve.
+
||Window briefly describes list of problems you need to solve.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the window
+
|| Cursor on the window.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let's start with the first problem.
+
|| Let's start with the first problem.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the sentence.  
+
|| Highlight the sentence.  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We need to prepare 100 ml of 1 molar Sodium Chloride solution.
+
|| We need to prepare 100 ml of 1 molar Sodium Chloride solution.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Workbench'''
+
|| Click on '''Workbench'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Switch back to the '''Workbench''' by clicking on '''Workbench tab.'''
+
|| Switch back to the '''Workbench''' by clicking on '''Workbench tab'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on '''Stockroom explorer'''
+
|| Cursor on '''Stockroom explorer'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| On the right-side panel, '''Stockroom Explorer''' opens.
+
|| On the right-side panel, '''Stockroom Explorer''' opens.
−
 
+
  
 
It lists various chemicals to be used for this experiment.
 
It lists various chemicals to be used for this experiment.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on '''Stockroom explorer'''
+
|| Cursor on '''Stockroom explorer'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| It has distilled water for making solutions.
+
|| It has distilled water for making solutions.
  
−
Some solids such as Sodium Chloride, Magnesium Chloride and Sodium Sulfate.
+
Some solids such as Sodium Chloride, Magnesium Chloride and Sodium Sulphate.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on workbench.
+
|| Cursor on workbench.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us place the required chemicals and apparatus on the Workbench.
+
|| Let us place the required chemicals and apparatus on the Workbench.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on '''Stockroom explorer'''
+
|| Cursor on '''Stockroom explorer'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Double-Click on Sodium chloride''' '''and''' Distilled water '''icons'''.'''
+
|| Double-Click on Sodium chloride''' and ''' Distilled water '''icons'''.
  
−
 
+
Sodium Chloride''' bottle and Distilled water are added to the '''Workbench'''.
−
Sodium Chloride''' '''bottle and Distilled water are added to the W'''orkbench.'''
+
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Click to select the tools from the drop down menu''' option on '''Workbench'''
+
|| Click on '''Click to select the tools from the drop down menu''' option on '''Workbench'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Click to select tools from the drop down menu'''.
+
|| Click on '''Click to select tools from the drop down menu'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Scale'''
+
|| Click on '''Scale'''
−
 
+
  
 
Cursor on the '''Workbench'''
 
Cursor on the '''Workbench'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Scale'''.
+
|| Click on '''Scale'''.
  
  
 
'''Scale''' appears on the work '''bench'''.
 
'''Scale''' appears on the work '''bench'''.
−
 
−
 
−
 
−
 
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Go to '''Click to select new glassware from the drop down menu''' icon
+
|| Go to '''Click to select new glassware from the drop down menu''' icon
  
 
Select '''Erlenmeyers'''.
 
Select '''Erlenmeyers'''.
Line 154: Line 144:
 
Point to the '''Erlenmeyer.'''
 
Point to the '''Erlenmeyer.'''
  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Go to '''Click to select new glassware from the drop down menu''' icon.
+
|| Go to '''Click to select new glassware from the drop down menu''' icon.
  
  
−
Select '''Erlenmeyers,'''
+
Select '''Erlenmeyers''',
  
  
−
From the sub menu, select '''250 ml Erlenmeyer Flask.'''
+
From the sub menu, select '''250 ml Erlenmeyer Flask'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Go to '''Click to select new glassware from the drop down menu'''  
+
|| Go to '''Click to select new glassware from the drop down menu'''  
  
 
Select '''Volumetrics'''.
 
Select '''Volumetrics'''.
Line 170: Line 160:
  
 
Click on '''100ml Volumetric Flask.'''
 
Click on '''100ml Volumetric Flask.'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Go to S'''elect new glassware '''icon'''.'''
+
|| Go to '''Select new glassware ''' icon.
  
  
Line 176: Line 166:
  
  
−
From the sub menu, select '''100ml Volumetric Flask. '''
+
From the sub menu, select '''100ml Volumetric Flask'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Go on '''Click to select new glassware from the drop down menu'''  
+
|| Go on '''Click to select new glassware from the drop down menu'''.
  
 
Select '''Pipet'''.
 
Select '''Pipet'''.
Line 186: Line 176:
  
 
Click on '''10ml Pipet.'''
 
Click on '''10ml Pipet.'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Again click on''' select new glassware '''icon.
+
|| Again click on '''Select new glassware''' icon.
−
 
+
  
 
Select '''Pipets'''.
 
Select '''Pipets'''.
  
−
 
+
From the sub menu, select '''5ml Pipet'''.
−
From the sub menu, select '''5ml Pipet.'''
+
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide number 5'''
+
|| '''Slide number 5'''
  
 
'''Calculation'''
 
'''Calculation'''
  
−
'''molar mass of sodium chloride <nowiki>=</nowiki> 58.44g/mol.'''
+
'''molar mass of sodium chloride <nowiki>=</nowiki> 58.44g/mol'''.
  
  
−
'''Formula: M=Wt/Molar mass X 1000/ ml'''
+
'''Formula: M = Wt/Molar mass X 1000/ mL'''
  
  
−
'''1.0=Wt/58.44 x1000/100'''
+
'''1.0= Wt/58.44 x1000/100'''
  
−
'''Wt=5.844g'''
+
'''Wt= 5.844g'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Molar mass of sodium chloride is 58.44 g/mol.
+
|| Molar mass of sodium chloride is 58.44 g/mol.
  
  
Line 217: Line 202:
  
  
−
For 100ml of 1M(molar) solution we need''' '''5.844 '''grams''' of Sodium Chloride.
+
For 100ml of 1 M(molar) solution we need '''5.844 grams''' of '''Sodium Chloride'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on the '''Erlenmeyer Flask '''and drag.
+
|| Click on the '''Erlenmeyer Flask'''and drag.
 +
|| Back to the workbench.
  
 +
Drag the '''Scale''' to a convenient position on the Workbench.
  
  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Back to the workbench.
+
Click on '''Erlenmeyer Flask '''and drag on to the Scale.
−
 
+
−
 
+
−
Drag the '''Scale '''to a convenient position on the Workbench.
+
−
 
+
−
 
+
−
Click on '''Erlemeyer Flask '''and drag on to the Scale.
+
  
  
Line 236: Line 217:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to the weight given on the Scale.
+
|| Point to the weight given on the Scale.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Green plus mark indicates suitable position for placing the '''Erlenmeyer Flask.'''
+
|| Green plus mark indicates suitable position for placing the '''Erlenmeyer Flask'''.
  
  
−
Release the mouse button, to place the '''Erlenmeyer Flask''' on the '''Scale.'''
+
Release the mouse button, to place the '''Erlenmeyer Flask''' on the '''Scale'''.
  
  
−
'''Scale''' shows '''mass''' of the '''Erlenmeyer Flask.'''
+
'''Scale''' shows '''mass''' of the '''Erlenmeyer Flask'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Tare''' button on the Scale
+
|| Click on '''Tare''' button on the Scale
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''TARE''' button on the '''Scale. '''
+
|| Click on '''TARE''' button on the '''Scale'''.
  
 
This step will reset the weight value to zero.
 
This step will reset the weight value to zero.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to '''Scale'''
+
|| Point to '''Scale'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Scale''' reads''' 0 g(zero grams)'''.
+
|| '''Scale''' reads '''0 g(zero grams)'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''NaCl''' bottle and move  
+
|| Click on '''NaCl''' bottle and move  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on Sodium Chloride bottle and move it over the '''Erlenmeyer Flask.'''
+
|| Click on '''Sodium Chloride''' bottle and move it over the '''Erlenmeyer Flask'''.
  
  
−
Place the bottle in the correct position after it shows green '''plus mark.'''
+
Place the bottle in the correct position after it shows green '''plus mark'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type '''0.5844''' in the '''Transfer amount(g)''' text bar below and click on '''Pour'''.
+
|| Type '''0.5844''' in '''Transfer amount(g)''' text bar >> click on '''Pour'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type '''5.844''' in the '''Transfer amount''' text bar at the bottom of the '''Workbench.'''
+
|| Type '''5.844''' in the '''Transfer amount''' text bar at the bottom of the '''Workbench.'''
  
  
Line 270: Line 251:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to '''Scale'''
+
|| Point to '''Scale'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| You can see that the '''Scale''' reads exactly 5.'''844 grams.'''
+
|| You can see that the '''Scale''' reads exactly '''5.844 grams'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click and drag the '''NaCl '''bottle  
+
|| Click >> drag the '''NaCl '''bottle  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click and drag Sodium Chloride bottle to a different place on the '''Workbench'''.
+
|| Click and drag Sodium Chloride bottle to a different place on the '''Workbench'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click, drag the Erlenmeyer Flask and place it on the '''Workbench.'''
+
|| Click, drag Erlenmeyer Flask >> place it on '''Workbench'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Remove the '''Erlenmeyer Flask '''and keep it aside.
+
|| Remove the '''Erlenmeyer Flask ''' and keep it aside.
−
 
+
−
 
+
−
 
+
−
 
+
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on the '''Scale''' and press '''Backspace'''.
+
|| Click on the '''Scale''', press '''Backspace'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To remove the '''Scale''' from the''' Workbench''', Click on the '''Scale '''and press '''delete.'''
+
|| To remove the '''Scale''' from the '''Workbench''', Click on the '''Scale''' and press '''Delete'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Drag the '''Distilled water''' on to the '''250ml Erlenmeyer Flask'''
+
|| Drag ''Distilled water''' on '''250ml Erlenmeyer Flask'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Drag the '''Distilled water''' on to the '''250ml Erlenmeyer Flask'''
+
|| Drag the '''Distilled water''' on to the '''250ml Erlenmeyer Flask'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type 90 in the '''Transfer bar''' below.
+
|| Type 90 in '''Transfer bar''' below.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type 90 in the '''Transfer bar '''below.
+
|| Type 90 in the '''Transfer bar''' below.
  
 
Click on '''Pour'''.
 
Click on '''Pour'''.
Line 302: Line 279:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Drag and place the distilled water to a corner of the Workbench.
+
|| Drag, place distilled water to a corner of the Workbench.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Drag and place the distilled water to a corner of the Workbench.
+
|| Drag and place the distilled water to a corner of the '''Workbench'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Drag the''' volumetric flask '''next to '''Erlenmeyer flask. '''
+
|| Drag ''' volumetric flask''' next to '''Erlenmeyer flask. '''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Place the''' volumetric flask '''next to '''Erlenmeyer flask. '''
+
|| Place the '''volumetric flask''' next to '''Erlenmeyer flask'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click and drag the '''Erlenmeyer''' on to the 100ml Flask  
+
|| Click, drag the '''Erlenmeyer''' on to the 100ml Flask.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click and drag the '''Erlenmeyer''' on to 100ml Volumetric Flask  
+
|| Click and drag the '''Erlenmeyer''' on to 100ml Volumetric Flask.
  
  
 
Make sure that '''green plus mark''' appears.
 
Make sure that '''green plus mark''' appears.
  
−
 
+
To transfer the contents of the Flask, use '''Realistic Transfer''' option.
−
To transfer the contents of the Flask, use '''Realistic Transfer '''option'''.'''
+
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Tools''' menu.
+
|| Click on '''Tools''' menu.
  
−
Scroll down and click on '''Transfer.'''
+
Scroll down >> click on '''Transfer'''.
  
−
A sub menu appears
+
A sub menu appears.
  
−
Click on '''Realistic Transfer'''
+
Click on '''Realistic Transfer''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Tools''' menu.
+
|| Click on '''Tools''' menu.
  
−
Scroll down and click on '''Transfer Bar.'''
+
Scroll down and click on '''Transfer Bar'''.
  
−
 
+
From the sub menu click on '''Realistic Transfer''' radio button.
−
From the sub menu click on '''Realistic Transfer '''radio button'''.'''
+
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on '''Realistic transfer Scale.'''
+
|| Cursor on '''Realistic transfer Scale'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Realistic transfer Scale '''appears at the bottom of the Workbench.
+
|| '''Realistic transfer Scale''' appears at the bottom of the Workbench.
−
 
+
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Hold down the mouse button on '''Pour '''
+
|| Hold down the mouse button on '''Pour'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Pour '''button.  
+
|| Click on '''Pour''' button.  
  
  
−
Hold the left mouse button''' '''until entire amount has been transferred to the Flask.
+
Hold the left mouse button until entire amount has been transferred to the Flask.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Place the water tank over Erlenmeyer Flask.  
+
|| Place the water tank over Erlenmeyer Flask.  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To wash the '''Erlenmeyer Flask''' with distilled water;
+
|| To wash the '''Erlenmeyer Flask''' with distilled water;
  
 
Place the water tank over the '''Erlenmeyer Flask '''and transfer 5ml distilled water.
 
Place the water tank over the '''Erlenmeyer Flask '''and transfer 5ml distilled water.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type 5 in the realistic transfer bar.
+
|| Type 5 in the realistic transfer bar.
  
 
Click on pour.
 
Click on pour.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Change the '''Transfer Bar''' to '''Precise''' '''Transfer''' using '''Tools''' menu.
+
|| Change the '''Transfer Bar''' to '''Precise''' '''Transfer''' using '''Tools''' menu.
  
 
Type 5 in the Transfer bar below.
 
Type 5 in the Transfer bar below.
Line 362: Line 336:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the Workbench.
+
|| Cursor on the Workbench.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now pour the contents of the '''Erlenmeyer''' '''Flask''' into the '''Volumetric Flask'''.
+
|| Now pour the contents of the '''Erlenmeyer Flask''' into the '''Volumetric Flask'''.
  
  
Line 369: Line 343:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Pour button. '''
+
|| Click on '''Pour button. '''
  
 
Hold the left mouse button until entire amount has been transferred to the Flask.
 
Hold the left mouse button until entire amount has been transferred to the Flask.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Pour '''button.  
+
|| Click on '''Pour '''button.  
  
 
Hold the left mouse button until entire amount has been transferred to the Flask.
 
Hold the left mouse button until entire amount has been transferred to the Flask.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Tools>>Transfer bar>>Precise transfer.
+
|| Tools >> Transfer bar >> Precise transfer.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Change the transfer mode to '''Precise''' '''Transfer.'''
+
|| Change the transfer mode to '''Precise Transfer'''.
  
 
Place the distilled water above the '''Erlenmeyer Flask'''.
 
Place the distilled water above the '''Erlenmeyer Flask'''.
  
  
−
Transfer 5 ml distilled water into '''Erlenmeyer Flask. '''
+
Transfer 5 ml distilled water into '''Erlenmeyer Flask'''.
  
  
−
Type 5 in the '''Transfer amount '''text bar and click on '''Pour.'''
+
Type 5 in the '''Transfer amount''' text bar and click on '''Pour'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click and drag distilled water to a corner.
+
|| Click and drag distilled water to a corner.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Move the distilled water to a corner of the Workbench.
+
|| Move the distilled water to a corner of the Workbench.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| .Cursor on P'''ipet'''
+
|| Cursor on '''Pipet'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Move the 5 ml P'''ipet''' onto Erlenmeyer Flask.
+
|| Move the 5 ml '''Pipet''' onto Erlenmeyer Flask.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type 10 in the '''Transfer amount(ml''') text bar below and click on '''Withdraw.'''
+
|| Type 10 in the '''Transfer amount(mL)''' text bar below >> click on '''Withdraw'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type 5 in the '''Transfer amount''' text bar and click on '''Withdraw'''.
+
|| Type 5 in the '''Transfer amount''' text bar and click on '''Withdraw'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to''' Pipet'''
+
|| Point to '''Pipet'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| 5 ml of water is withdrawn into the Pipet.
+
|| 5 ml of water is withdrawn into the Pipet.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Drag the Pipet and place it on the volumetric Flask.
+
|| Drag the Pipet >> place it on volumetric Flask.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Drag the Pipet onto '''100ml Volumetric Flask.'''
+
|| Drag the Pipet onto '''100 mL Volumetric Flask.'''
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Select
+
|| Select
  
−
'''Tools->Transfer->Realistic Transfer'''
+
'''Tools >> Transfer >> Realistic Transfer'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Change the transfer mode to '''Realistic Transfer '''using''' Tools '''menu.
+
|| Change the transfer mode to '''Realistic Transfer '''using''' Tools '''menu.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Pou'''r button
+
|| Click on '''Pour''' button
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on '''Pour '''button gradually so as to make upto the mark.
+
|| Click on '''Pour'''button gradually so as to make up to the mark.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to the mark on volumetric Flask.
+
|| Point to the mark on volumetric Flask.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| For colourless solutions, the lower meniscus must be on the 100 ml mark.
+
|| For colourless solutions, the lower meniscus must be on the 100 ml mark.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Point to the''' Flask.'''
+
|| Point to the '''Flask'''.
  
  
−
Point to''' solution info panel.'''
+
Point to '''solution info panel'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on the standard Flask.
+
|| Click on the standard Flask.
  
  
−
We now have 100 ml of sodium chloride('''NaCl) '''solution as indicated in the '''Solution info panel'''.
+
We now have 99.856 mL of '''sodium chloride(NaCl)''' solution as indicated in the '''Solution info panel'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the '''Solution Info Panel.'''
+
|| Cursor on '''Solution Info Panel'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Click on the standard Flask.
+
|| Click on the standard Flask.
  
  
−
'''Solution Info Panel''' on the right displays the '''Species '''and the corresponding '''Molarity.'''
+
'''Solution Info Panel''' on the right displays the '''Species ''' and the corresponding '''Molarity'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the '''Solution Info Panel.'''  
+
|| Cursor on the '''Solution Info Panel'''.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Observe that the concentration of '''sodium cation''' is approximately''' 1.0 molar.'''
+
|| Observe that the concentration of '''sodium cation''' is approximately '''1.0 molar'''.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the problem statement.
+
|| Highlight the problem statement.
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Go back to Problem description window.  
+
|| Go back to Problem description window.  
  
  
Line 451: Line 425:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number'''
+
|| '''Slide Number'''
  
 
'''Summary '''
 
'''Summary '''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us summarize.
+
|| Let us summarize.
  
 
In this tutorial we have learnt to prepare,
 
In this tutorial we have learnt to prepare,
  
−
100 ml of 1molar sodium chloride solution.
+
100 ml of 1 molar sodium chloride solution.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number'''
+
|| '''Slide Number'''
  
 
'''Assignment'''
 
'''Assignment'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| As an assignment,
+
|| As an assignment,
  
 
Prepare the following standard solutions,
 
Prepare the following standard solutions,
  
  
−
200 ml of 5 molar sodium chloride solution
+
250 ml of 5 molar sodium chloride solution
  
  
Line 475: Line 449:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number13:'''
+
|| '''Slide Number13'''
  
 
'''About Spoken Tutorial project'''
 
'''About Spoken Tutorial project'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The video at the following link summarizes the Spoken Tutorial project.
+
|| The video at the following link summarizes the Spoken Tutorial project.
  
 
Please download and watch it.
 
Please download and watch it.
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number14:'''
+
|| '''Slide Number14'''
  
 
'''Spoken Tutorial workshops'''
 
'''Spoken Tutorial workshops'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The '''Spoken Tutorial Project '''team:
+
|| The '''Spoken Tutorial Project''' team,
  
 
conducts workshops using spoken tutorials and
 
conducts workshops using spoken tutorials and
Line 495: Line 469:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 15:'''
+
|| '''Slide Number 15'''
  
−
'''Forum for specific questions:'''
+
'''Forum for specific questions'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Do you have questions in THIS Spoken Tutorial?
+
|| Do you have questions in THIS Spoken Tutorial?
  
 
Please visit this site
 
Please visit this site
Line 506: Line 480:
  
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 16'''
+
|| '''Slide Number 16'''
  
−
'''Forum for specific questions:'''
+
'''Forum for specific questions'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The Spoken Tutorial forum is for specific questions on this tutorial
+
|| The Spoken Tutorial forum is for specific questions on this tutorial
  
 
Please do not post unrelated and general questions on them
 
Please do not post unrelated and general questions on them
Line 515: Line 489:
 
With less clutter, we can use this discussions as instructional material.
 
With less clutter, we can use this discussions as instructional material.
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide Number 17:'''
+
|| '''Slide Number 17'''
  
 
'''Acknowledgement'''
 
'''Acknowledgement'''
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
+
|| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
  
 
More information on this mission is available at this link.
 
More information on this mission is available at this link.
 
|-
 
|-
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|  
+
||  
−
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This tutorial is contributed by Snehalatha Kaliappan and Madhuri Ganapathi from IIT-Bombay.
+
|| This tutorial is contributed by Snehalatha Kaliappan and Madhuri Ganapathi from IIT-Bombay.
  
 
Thank you for joining.
 
Thank you for joining.
 
|-
 
|-
 
|}
 
|}

Latest revision as of 12:39, 23 February 2021

Visual Cue Narration
Slide Number 1

Title Slide

Welcome to this spoken tutorial on Preparation of Standard Solutions.
Slide Number 2

Learning Objectives

To prepare standard solution.

In this tutorial, we will learn to prepare standard solution of:

1 molar sodium chloride

Slide Number 3

Pre-requisites

To follow this tutorial you should be familiar with,

Higher secondary school Chemistry.

Slide Number 4

System Requirement

Here I am using

Mac OS version 10.10.5

ChemCollective Vlabs version 2.1.0

Java version 8.0

To run this application smoothly, please install latest version of Java.

Point to the window. Here I have opened Virtual Chemistry labs application window.
Cursor on the Workbench We will begin by preparing standard solutions from solids.
Go to File menu and click on Load homework option. Go to File menu and select Load Homework option.
A dialog box opens. Default Lab Setup dialog box opens.
The dialog box lists a number of local problems.

Select Molarity and Density

The dialog box lists a number of Local Problems.

From the list, double-click to select Molarity and Density.

Sub menu >> double click on Making solutions from solids From the sub menu, double-click on Making solutions from solids.
Cursor on the stockroom explorer On the left panel, Stockroom explorer opens.

It displays the required solutions and the problem description.

Click on problem description. Double-click on problem description icon.
A problem description window opens. A problem description window opens next to the Workbench.
Hover the mouse on the window. Window briefly describes list of problems you need to solve.
Cursor on the window. Let's start with the first problem.
Highlight the sentence. We need to prepare 100 ml of 1 molar Sodium Chloride solution.
Click on Workbench Switch back to the Workbench by clicking on Workbench tab.
Cursor on Stockroom explorer. On the right-side panel, Stockroom Explorer opens.

It lists various chemicals to be used for this experiment.

Cursor on Stockroom explorer. It has distilled water for making solutions.

Some solids such as Sodium Chloride, Magnesium Chloride and Sodium Sulphate.

Cursor on workbench. Let us place the required chemicals and apparatus on the Workbench.
Cursor on Stockroom explorer. Double-Click on Sodium chloride and Distilled water icons.

Sodium Chloride bottle and Distilled water are added to the Workbench.

Click on Click to select the tools from the drop down menu option on Workbench. Click on Click to select tools from the drop down menu.
Click on Scale

Cursor on the Workbench

Click on Scale.


Scale appears on the work bench.

Go to Click to select new glassware from the drop down menu icon

Select Erlenmeyers.


A sub menu appears.

Click on 250 ml Erlenmeyer Flask.

Point to the Erlenmeyer.

Go to Click to select new glassware from the drop down menu icon.


Select Erlenmeyers,


From the sub menu, select 250 ml Erlenmeyer Flask.

Go to Click to select new glassware from the drop down menu

Select Volumetrics.

A sub menu appears.

Click on 100ml Volumetric Flask.

Go to Select new glassware icon.


Select Volumetrics.


From the sub menu, select 100ml Volumetric Flask.

Go on Click to select new glassware from the drop down menu.

Select Pipet.

A sub menu appears.

Click on 10ml Pipet.

Again click on Select new glassware icon.

Select Pipets.

From the sub menu, select 5ml Pipet.

Slide number 5

Calculation

molar mass of sodium chloride = 58.44g/mol.


Formula: M = Wt/Molar mass X 1000/ mL


1.0= Wt/58.44 x1000/100

Wt= 5.844g

Molar mass of sodium chloride is 58.44 g/mol.


Use the given formula to calculate Molarity.


For 100ml of 1 M(molar) solution we need 5.844 grams of Sodium Chloride.

Click on the Erlenmeyer Flaskand drag. Back to the workbench.

Drag the Scale to a convenient position on the Workbench.


Click on Erlenmeyer Flask and drag on to the Scale.


Release the mouse button after you see a green plus mark.

Point to the weight given on the Scale. Green plus mark indicates suitable position for placing the Erlenmeyer Flask.


Release the mouse button, to place the Erlenmeyer Flask on the Scale.


Scale shows mass of the Erlenmeyer Flask.

Click on Tare button on the Scale Click on TARE button on the Scale.

This step will reset the weight value to zero.

Point to Scale. Scale reads 0 g(zero grams).
Click on NaCl bottle and move Click on Sodium Chloride bottle and move it over the Erlenmeyer Flask.


Place the bottle in the correct position after it shows green plus mark.

Type 0.5844 in Transfer amount(g) text bar >> click on Pour. Type 5.844 in the Transfer amount text bar at the bottom of the Workbench.


Click on Pour button.

Point to Scale You can see that the Scale reads exactly 5.844 grams.
Click >> drag the NaCl bottle Click and drag Sodium Chloride bottle to a different place on the Workbench.
Click, drag Erlenmeyer Flask >> place it on Workbench. Remove the Erlenmeyer Flask and keep it aside.
Click on the Scale, press Backspace. To remove the Scale from the Workbench, Click on the Scale and press Delete.
Drag Distilled water' on 250ml Erlenmeyer Flask. Drag the Distilled water on to the 250ml Erlenmeyer Flask.
Type 90 in Transfer bar below. Type 90 in the Transfer bar below.

Click on Pour.


This will transfer 90 ml of distilled water into the Flask.

Drag, place distilled water to a corner of the Workbench. Drag and place the distilled water to a corner of the Workbench.
Drag volumetric flask next to Erlenmeyer flask. Place the volumetric flask next to Erlenmeyer flask.
Click, drag the Erlenmeyer on to the 100ml Flask. Click and drag the Erlenmeyer on to 100ml Volumetric Flask.


Make sure that green plus mark appears.

To transfer the contents of the Flask, use Realistic Transfer option.

Click on Tools menu.

Scroll down >> click on Transfer.

A sub menu appears.

Click on 'Realistic Transfer.

Click on Tools menu.

Scroll down and click on Transfer Bar.

From the sub menu click on Realistic Transfer radio button.

Cursor on Realistic transfer Scale. Realistic transfer Scale appears at the bottom of the Workbench.
Hold down the mouse button on Pour. Click on Pour button.


Hold the left mouse button until entire amount has been transferred to the Flask.

Place the water tank over Erlenmeyer Flask. To wash the Erlenmeyer Flask with distilled water;

Place the water tank over the Erlenmeyer Flask and transfer 5ml distilled water.

Type 5 in the realistic transfer bar.

Click on pour.

Change the Transfer Bar to Precise Transfer using Tools menu.

Type 5 in the Transfer bar below.

Click on Pour button.

Cursor on the Workbench. Now pour the contents of the Erlenmeyer Flask into the Volumetric Flask.


To transfer the contents of the Flask, use Realistic Transfer option.

Click on Pour button.

Hold the left mouse button until entire amount has been transferred to the Flask.

Click on Pour button.

Hold the left mouse button until entire amount has been transferred to the Flask.

Tools >> Transfer bar >> Precise transfer. Change the transfer mode to Precise Transfer.

Place the distilled water above the Erlenmeyer Flask.


Transfer 5 ml distilled water into Erlenmeyer Flask.


Type 5 in the Transfer amount text bar and click on Pour.

Click and drag distilled water to a corner. Move the distilled water to a corner of the Workbench.
Cursor on Pipet. Move the 5 ml Pipet onto Erlenmeyer Flask.
Type 10 in the Transfer amount(mL) text bar below >> click on Withdraw. Type 5 in the Transfer amount text bar and click on Withdraw.
Point to Pipet 5 ml of water is withdrawn into the Pipet.
Drag the Pipet >> place it on volumetric Flask. Drag the Pipet onto 100 mL Volumetric Flask.
Select

Tools >> Transfer >> Realistic Transfer.

Change the transfer mode to Realistic Transfer using Tools menu.
Click on Pour button Click on Pourbutton gradually so as to make up to the mark.
Point to the mark on volumetric Flask. For colourless solutions, the lower meniscus must be on the 100 ml mark.
Point to the Flask.


Point to solution info panel.

Click on the standard Flask.


We now have 99.856 mL of sodium chloride(NaCl) solution as indicated in the Solution info panel.

Cursor on Solution Info Panel. Click on the standard Flask.


Solution Info Panel on the right displays the Species and the corresponding Molarity.

Cursor on the Solution Info Panel. Observe that the concentration of sodium cation is approximately 1.0 molar.
Highlight the problem statement. Go back to Problem description window.


Similarly you can also try some of these problems.

Slide Number

Summary

Let us summarize.

In this tutorial we have learnt to prepare,

100 ml of 1 molar sodium chloride solution.

Slide Number

Assignment

As an assignment,

Prepare the following standard solutions,


250 ml of 5 molar sodium chloride solution


500 ml of 10 normal Magnesium chloride solution.

Slide Number13

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Please visit this site Choose the minute and second where you have the question. Explain your question briefly Someone from our team will answer them.

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Forum for specific questions

The Spoken Tutorial forum is for specific questions on this tutorial

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Slide Number 17

Acknowledgement

Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

More information on this mission is available at this link.

This tutorial is contributed by Snehalatha Kaliappan and Madhuri Ganapathi from IIT-Bombay.

Thank you for joining.

Contributors and Content Editors

Madhurig, PoojaMoolya

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