ChemCollective-Virtual-Labs/C2/Density-of-Solids-and-Liquids/English - Revision history

Madhurig at 07:50, 4 June 2018

2018-06-04T07:50:52Z

Snehalathak at 11:07, 20 December 2016

2016-12-20T11:07:21Z

Snehalathak at 10:59, 20 December 2016

2016-12-20T10:59:44Z

Madhurig at 10:46, 20 December 2016

2016-12-20T10:46:48Z

Madhurig: Created page with "{| border=1 ||'''Visual Cue''' ||'''Narration''' |- ||'''Slide Number 1''' '''Title Slide''' || Welcome to this tutorial on '''Density of Metals and Liquids''' using '''Vlabs..."

2016-12-20T09:45:18Z

Created page with "{| border=1 ||'''Visual Cue''' ||'''Narration''' |- ||'''Slide Number 1''' '''Title Slide''' || Welcome to this tutorial on '''Density of Metals and Liquids''' using '''Vlabs..."

New page

{| border=1
||'''Visual Cue'''
||'''Narration'''
|-
||'''Slide Number 1'''

'''Title Slide'''
|| Welcome to this tutorial on '''Density of Metals and Liquids''' using '''Vlabs'''.

|-
|| '''Slide Number 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn to determine,

Densities of Metals and liquids.
|-
|| '''Slide Number 3'''

'''Pre-requisites'''

'''www.spoken-tutorial.org'''
|| To follow this tutorial you should be familiar with,

'''ChemCollective Vlabs''' interface.

If not, for relevant tutorials please visit our website.

|-
|| '''Slide Number 4'''

'''System Requirement'''
|| Here I am using

Mac OS version 10.10.5

ChemCollective Vlabs version 2.1.0

Java version 8.

|-
|| Cursor on the window.
|| Here I have opened a '''Vlabs''' window.

|-
|| Click on '''File->Load homework''' option.
|| Click on '''File menu''' and select '''Load homework''' option.
|-
|| Select '''Molarity and Density''' from the list.
|| Select '''Molarity and Density''' from the list.

|-
|| Click on '''Metal density problem''' from the drop down menu
|| Double-click on '''Metals Density Problem''' from the sub-menu.

|-
|| Go to '''problem description''' in the '''stockroom explorer.'''
|| Go to '''problem description''' in the '''stockroom explorer.'''

|-
|| Point to '''problem.'''
|| Pause the video to read the problem and then resume again.

|-
|| Point to '''problem.'''

'''Silver-10.5, '''

'''Rhodium-12.4''' and

'''Platinum- 21.45 grams per cubic centimeter.'''
|| Problem states that you have 3 '''unlabeled''' bottles with '''metallic''' powder.

You need to identify the metals in the bottles.

The metal '''densities''' are given in the '''problem description'''.

We will use '''Archimedes' Principle''' to find the densities of metals.

|-
|| '''Slide Number 5'''

'''Archimedes Principle'''
|| An object when immersed in water will displace water.

The displaced water will be equal to its volume.

|-
|| '''Slide Number 6'''

'''Archimedes Principle'''

|| Different metals have different densities.

Hence, different metals of the same weight have different volumes.

A metal that is less dense will displace more water than a denser one.

|-
|| Click on '''Workbench'''
|| Switch to '''Workbench'''
|-
|| Cursor on the '''stockroom explorer'''.
|| Double Click on '''Metal 1, Metal 2, Metal 3''' to add them to the '''Workbench.'''

Double click on '''water''' icon.
|-
|| Go to '''Click to select new glassware from the drop down menu'''

Select '''Graduated Cylinders'''.

A sub menu appears.

Click on '''25ml Graduated Cylinder.'''
|| Click on '''Glassware''' icon.

Select '''Graduated Cylinders'''.

From the sub-menu select '''25ml Graduated Cylinder.'''

|-
|| Right-click on '''Graduated Cylinder.'''

'''Context menu opens.'''
|| We need three 25ml ''' Graduated Cylinders''' for this experiment.

Right-click on '''Graduated Cylinder.'''

'''Context menu opens.'''

Using '''Duplicate''' option make 2 copies of the '''Graduated Cylinder'''.

|-
|| Click and hold the left mouse button.

Drag over the cylinders to select.

Click on any cylinder >> drag to the convenient position.
|| Drag and bring the '''Graduated Cylinders '''to the center of the '''Workbench'''.

|-
|| Right-click on '''Graduated Cylinder.'''

From the '''Context-menu''' select '''Rename''' option.

Text box opens, type '''1''' in the text box and click '''Ok''' button.
|| Label the '''Cylinders''' as 1, 2 and 3.

|-
|| Drag '''graduated cylinder 1''' to the Distilled water tank.

Point to the red warning icon.
|| Let us drag '''graduated cylinder 1''' to the water tank.

Notice that a red warning icon appears.

This indicates that procedure is incorrect.

Place '''graduated cylinder 1''' aside.

The correct procedure is to drag '''water''' on to the '''graduated cylinder.'''

|-
|| Tools>>Transfer bar>>Precise transfer.
|| Change the transfer mode to '''Precise Transfer''' using '''Tools''' menu.

|-
|| Type 10 in the '''Transfer amount input bar>>''' click on '''pour.'''

Point to the '''graduated cylinder.'''
|| Type 10 in the '''Transfer amount input bar.'''

Click on '''pour.'''

10 ml of water is transferred into the '''graduated cylinder 1.'''

|-
|| Type 10 in the '''Transfer amount input bar''' >> click on '''pour.'''
|| Likewise transfer 10ml of water into '''graduated cylinders 2''' and ''' 3.'''

|-
|| Drag the water tank to a different place on the '''Workbench'''
|| Move the water tank to a different place on the '''Workbench.'''

|-
|| Click on '''Select Tools''' menu, from the list, select '''Scale'''.
|| Click on '''Select Tools''' menu, from the list, select '''Scale'''.

Drag the Scale to a convenient position on the Workbench.

|-
|| Click on '''Select Tools''' menu >>from the list select '''Weighing Boat.'''
|| Again click on '''Select Tools''' menu, from the list select '''Weighing Boat.'''

|-
|| Right-click on '''Weighing Boat.'''

'''Context menu opens.'''

Using copy and paste option make 2 copies of the '''Weighing Boat'''.
|| We need three '''Weighing Boats''' for this experiment.

We can also use short-cut keys, to copy and paste.

Click on '''Weighing Boat.'''

Use '''Ctrl-C''' to copy and '''Ctrl-V''' to paste.

|-
|| Click and hold the left mouse button.

Drag over the weighing boats to select.

Click on any weighing boat >> drag to the convenient position.
|| Drag and bring the '''weighing boats '''to the center of the '''Workbench'''

|-
|| Right-click on '''Weighing Boat.'''

From the '''Context-menu''' select '''Rename''' option.

Text box opens, type ''' 1''' in the text box and click '''Ok''' button.

|| Label the '''Weighing Boats''' as 1, 2 and 3.

|-
|| Place '''weighing boat 1''' over the '''scale'''.
|| Place '''weighing boat 1''' over the '''scale'''.

Click on '''Tare''' button on the scale.

|-
|| Drag the '''Metal 1 ''' over the '''weighing boat.'''

|| Drag '''Metal 1 ''' over to '''weighing boat 1.'''

|-
|| Type '''50''' in the '''Transfer Amount(g)''' text bar.

Click on '''Pour'''.

Drag the bottle.
|| Type 50 in the '''Transfer Amount(g)''' input bar

Click on''' Pour. '''

Place the bottle aside.

|-
|| Cursor on the''' weighing boat.'''

Drag the''' weighing boat 1''' over the '''graduated cylinder 1.'''
|| Remove the '''weighing boat''' from the ''' scale.'''

Place '''weighing boat 1''' over the '''graduated cylinder 1.'''

|-
|| Type 50 in the '''Transfer amount input bar''' below.

Click on '''Pour.'''
|| Type 50 in the '''Transfer Amount input bar''' .

Click on''' Pour.'''

|-
|| Point to '''graduated cylinder.'''

Drag''' weighing boat 1 '''aside.
|| Observe the level of water in the cylinder.

It has risen by 5 ml.

Keep the '''weighing boat 1''' aside.

|-
|| Place '''weighing boat 2''' over the '''scale'''.

Click on '''TARE''' button on the scale.
|| Now, Place '''weighing boat 2''' on the '''scale'''.

Click on '''TARE''' button on the scale.

|-
|| Drag '''Metal 2 ''' over the '''weighing boat.'''
|| Drag '''Metal 2 ''' over '''weighing boat 2.'''

|-
|| Type '''50''' in the '''Transfer Amount(g) input bar'''

Click on ''' Pour.'''

Drag the bottle.
|| Type '''50''' in the '''Transfer Amount(g) input bar'''.

Click on''' Pour.'''

Place the bottle aside.

|-
|| Click on the '''weighing boat '''and drag.

Place '''weighing boat 2''' over the '''graduated cylinder 2.'''
|| Remove the '''weighing boat 2''' from the''' scale.'''

Place '''weighing boat 2''' over the '''graduated cylinder 2.'''

|-
|| Type 50 in the '''Transfer Amount(g) input bar'''.

Click on''' Pour.'''
|| Type 50 in the '''Transfer Amount(g)input bar'''.

Click on''' Pour.'''

|-
|| Point to '''graduated cylinder 2.'''

Keep the '''weighing boat 1''' aside.
|| Observe that the water level in the cylinder has risen by 4 ml.

Keep the '''weighing boat 1''' aside.

|-
|| Place '''weighing boat 3''' over the '''graduated cylinder 3.'''
|| Similarly, weigh 50 grams of metal 3 using '''weighing boat 3. '''

Place '''weighing boat 3''' over the '''graduated cylinder.'''

|-
|| Type 50 in the '''Transfer Amount(g) input bar'''.

Click on ''' Pour.'''

|| Type 50 in the '''Transfer Amount(g) input bar'''.

Click on ''' Pour.'''

|-
|| Point to '''graduated cylinder 3.'''

Keep the '''weighing boat 1''' aside.
|| Water level in the cylinder has risen by 2.5 ml.

Keep the '''weighing boat 1''' aside.

|-
|| '''Slide Number 7'''

'''Results'''

Calculate the densities using the formula:

Density= mass/volume.

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Solid
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mass (m)
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume (V) <nowiki>= V2-V1</nowiki>
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Density<nowiki>= m/V</nowiki>
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Given Density
| style="border:0.05pt solid #000000;padding:0.097cm;"| Metal

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Metal 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50 g
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 15-10<nowiki>=5</nowiki>
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50/5='''10'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''10.5'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Silver

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Metal 2
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50 g
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 14-10=4
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50/4='''12.25'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''12.4 '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rhodium

|}

|| This slide shows the density calculations for the metals.

Calculate the densities using the formula:

Density= mass/volume.

Experimental density of Metal 1 is 10 which corresponds to '''Silver'''.

Metal 2 is 12.2 which corresponds to ''' Rhodium.'''

Metal 3 is 20 which corresponds to '''Platinum.'''

|-
|| '''Slide Number 8'''

'''Assignment '''
|| Repeat the above experiment with different metal weights (30 g and 40 g).

Tabulate and analyse your results.

|-
|| Cursor on the Workbench
|| Lets proceed to the liquid density problem.

|-
|| Click on''' File->New '''workbench option.
|| Let us add a new workbench.

Click on''' File''' and select ''' New workbench''' option.

Click on the '''workbench.'''

|-
|| Go to ''' File->Load homework''' option
|| Go to ''' File''' menu and select '''Load homework''' option.

|-
|| Select '''Molarity and Density''' from the list.
|| Select '''Molarity and Density''' from the list.

|-
|| Click on '''Liquid density''' problem.
|| Double-click on '''Liquid density problem'''.

|-
|| Click on '''problem description''' in the '''stockroom explorer'''.
|| Double-click on '''problem description''' in the '''stockroom explorer'''.

|-
|| Point to '''problem.'''
|| Pause the video to read the problem statement.

Resume after reading.

|-
|| Cursor on the '''problem description.'''
|| The problem states that there are two compounds of '''A-1''' and '''A-2'''.

One of the liquids is a preservative, other liquid is not a preservative.

The preservative has higher density.

Our aim is to find the liquid containing '''Preservative.'''

For this we need to measure densities of '''A-1 '''and '''A-2'''.

|-
|| Click on '''Workbench'''
|| Switch back to '''Workbench'''

|-
|| Click on the two compounds '''A-1''' and '''A-2 ''' to add to it to '''work bench'''
|| Double-click on compounds '''A-1''' and '''A-2''' to add them to '''Workbench'''.

|-
|| Go to '''Click to select new glassware from the drop down menu'''.

Select '''Volumetrics.'''

A sub menu appears.

Click on''' 100ml volumetric flask.'''
|| Obtain a '''100ml volumetric flask''' from the glassware option.

|-
|| Right-click on '''Volumetric flask.'''

From the '''Context-menu''' select '''Duplicate''' option.
|| We need two '''100ml volumetric flasks''' for this experiment.

We can make a copy using '''Duplicate''' option.
|-
|| Drag and bring the flasks to the center of the workbench.
|| Drag and bring the flasks to the center of the workbench.

|-
|| Select '''Volumetric flask.'''

Press '''F2''' .

Enter '''A-1''' in the text box

Click on OK.

Similarly press '''F2''' to rename other flask as '''A-2'''.
|| Label the flasks '''A-1''' and '''A-2'''.

We can rename by pressing '''F2'''.
|-
|| Click on '''Click to select tools from the drop down menu.'''

Select '''Scale ''' and add it to the '''Workbench'''
|| Click on '''Select tools '''icon.

Select '''Scale ''' and add it to the '''Workbench.'''

|-
|| Place one 100ml '''volumetric flask''' on the '''scale''' >> click on '''TARE ''' button.
|| Place the '''volumetric flask A-1 '''on the scale.

click on '''TARE''' button.

|-
|| Transfer 100ml of '''Compound A1''' to the 100ml volumetric flask by '''Trecise Transfer mode'''
|| Transfer 100ml of '''Compound A1''' to '''flask A-1 '''by '''Precise Transfer mode.'''

|-
|| Point to '''scale.'''

Place the '''flask A-1''' aside.

Remove '''Volumetric flask''' from the scale.
|| Note the mass from the scale.

Scale reads '''126 g.'''

Note this value.

Place the flask '''A-1''' aside.

Remove '''Volumetric flask''' from the scale.

|-
|| Place flask A-2 on the scale, click on '''TARA''' button.

Transfer 100ml of '''Compound A1''' to '''flask A '''by '''Precise transfer mode.'''
|| Next place flask '''A-2''' on the scale, click on '''TARE'''.

Pour 100 ml of Compound '''A-2'''.

Scale reads '''85 g.'''

Note this value.

|-
|| '''Slide number 9'''

'''Results'''

Calculate densities using the formula:

Density=mass/volume

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Liquid
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mass (m)
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume (V)
| style="border:0.05pt solid #000000;padding:0.097cm;"| Density=m/v

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| A-1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 126.0 g
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 100 mL
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| 126/100=1.26 g/mL

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| A-2
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 85.0 g
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 100 mL
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| 85/100=0.85 g/mL

|}

|| Experimental results are tabulated on this slide.

Calculate densities using the formula:

Density=mass/volume

Observe that density of '''Compound A-1''' is more than '''Compound A-2.'''

Therefore '''Compound A-1''' contains the '''preservative.'''

|-
|| '''Slide Number 10'''

'''Summary '''
| | Let's summarize.

In this tutorial we have learnt to measure,

Densities of silver, rhodium and platinum using Archimedes' Principle.

Densities of liquids with unknown concentration.

|-
|| '''Slide Number 11'''

'''Assignment'''
|| For the assignment.

Open default lab setup window.

You will find many stock solutions.

Find density for a few solutions of your choice.

|-
|| '''Slide Number 12:'''

'''About Spoken Tutorial project'''
|| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

|-
|| '''Slide Number 13:'''

'''Spoken Tutorial workshops'''
|| The '''Spoken Tutorial Project '''team:

<nowiki>* </nowiki>conducts workshops using spoken tutorials and

* <nowiki>* gives certificates on passing online tests.</nowiki>

For more details, please write to us.

|-
|| '''Slide Number 14:'''

'''Forum for specific questions:'''

Do you have questions in THIS Spoken Tutorial?

* 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

|| Please post your timed queries in this forum.

|-
|| '''Slide Number 15:'''

'''Acknowledgemen'''t
|| 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
|-
|}

@@ Line 404: / Line 404: @@
 Density= mass/volume.
 {| style="border-spacing:0;"
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Solid
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mass (m)
-| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume (V) <nowiki>= V2-V1</nowiki>
+| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Density<nowiki>= m/V</nowiki>
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Given Density
@@ Line 417: / Line 420: @@
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50 g
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 15-10<nowiki>=5</nowiki>
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50/5='''10'''
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''10.5'''
@@ Line 428: / Line 434: @@
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''12.4 '''
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rhodium
 |}
 || This slide shows the density calculations for the metals.
@@ Line 605: / Line 620: @@
 Density=mass/volume
 || Experimental results are tabulated on this slide.
@@ Line 644: / Line 638: @@
 '''Summary '''
-| | Let's summarize.
+|| Let's summarize.
@@ Line 681: / Line 675: @@
 || The '''Spoken Tutorial Project '''team:
-<nowiki>* </nowiki>conducts workshops using spoken tutorials and
+conducts workshops using spoken tutorials and
-* <nowiki>* gives certificates on passing online tests.</nowiki>
+gives certificates on passing online tests.
 For more details, please write to us.
@@ Line 695: / Line 689: @@
 Do you have questions in THIS Spoken Tutorial?
-* Please visit this site
+Please visit this site
-* Choose the minute and second where you have the question
-* Explain your question briefly
+Choose the minute and second where you have the question
-* Someone from our team will answer them
 || Please post your timed queries in this forum.
@@ Line 706: / Line 701: @@
 || '''Slide Number 15:'''
-'''Acknowledgemen'''t
+'''Acknowledgement'''
 || Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

@@ Line 544: / Line 544: @@
 Similarly press '''F2'''  to rename other flask as '''A-2'''.
-|| Label the flasks '''A-1''' and '''A-2'''.
+|| Label the flasks as '''A-1''' and '''A-2'''.
 We can rename by pressing '''F2'''.

@@ Line 302: / Line 302: @@
 Drag''' weighing boat 1 '''aside.
-|| Observe the level of water in the cylinder.
+|| Observe the level of water in the graduated cylinder.
 It has risen by 5 ml.

@@ Line 33: / Line 33: @@
 '''System Requirement'''
-|| Here I am using
+|| Here I am using,
 Mac OS version 10.10.5
@@ Line 57: / Line 57: @@
 |-
-|| Go to '''problem description''' in the '''stockroom explorer.'''
+|| Go to '''Problem description''' in the '''Stockroom explorer.'''
-|| Go to '''problem description''' in the '''stockroom explorer.'''
+|| Go to '''Problem description''' in the '''Stockroom explorer.'''
 |-
@@ Line 127: / Line 127: @@
-From the sub-menu select '''25ml Graduated Cylinder.'''
+From the sub-menu select '''25 ml Graduated Cylinder.'''
 |-
@@ Line 134: / Line 134: @@
 '''Context menu opens.'''
-|| We need three 25ml ''' Graduated Cylinders''' for this experiment.
+|| We need three 25 ml ''' Graduated Cylinders''' for this experiment.
@@ Line 152: / Line 152: @@
 Click on any cylinder >> drag to the convenient position.
-|| Drag and bring the '''Graduated Cylinders '''to the center of the '''Workbench'''.
+|| Drag and bring the '''Graduated Cylinders ''' to the centre of the '''Workbench'''.
 |-
@@ Line 242: / Line 242: @@
 Click on any weighing boat >> drag to the convenient position.
-|| Drag and bring the '''weighing boats '''to the center of the '''Workbench'''
+|| Drag and bring the '''weighing boats ''' to the centre of the '''Workbench'''
 |-
@@ Line 258: / Line 258: @@
 || Place '''weighing boat 1''' over the '''scale'''.
-Click on '''Tare''' button on the scale.
+Click on '''TARE''' button on the scale.
 |-
@@ Line 266: / Line 266: @@
 |-
-|| Type '''50''' in the '''Transfer Amount(g)''' text bar.
+|| Type '''50''' in the '''Transfer Amount(g)''' input bar.
 Click on '''Pour'''.
@@ Line 274: / Line 274: @@
 || Type 50 in the '''Transfer Amount(g)''' input bar
-Click on''' Pour. '''
+Click on ''' Pour. '''
 Place the bottle aside.
@@ Line 342: / Line 342: @@
 Place '''weighing boat 2''' over the '''graduated cylinder 2.'''
-|| Remove the '''weighing boat 2''' from the''' scale.'''
+|| Remove the '''weighing boat 2''' from the ''' scale.'''
@@ Line 361: / Line 361: @@
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 2''' aside.
 || Observe that the water level in the cylinder has risen by 4 ml.
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 2''' aside.
 |-
@@ Line 389: / Line 389: @@
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 3''' aside.
 || Water level in the cylinder has risen by 2.5 ml.
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 3''' aside.
 |-
@@ Line 531: / Line 531: @@
 We can make a copy using '''Duplicate''' option.
 |-
-|| Drag and bring the flasks to the center of the workbench.
+|| Drag and bring the flasks to the centre of the workbench.
 || Drag and bring the flasks to the center of the workbench.
@@ Line 558: / Line 558: @@
 |-
 || Place one 100ml '''volumetric flask''' on the '''scale''' >> click on '''TARE ''' button.
-|| Place the '''volumetric flask A-1 '''on the scale.
+|| Place the '''volumetric flask A-1 ''' on the scale.
 click on '''TARE''' button.
 |-
-|| Transfer 100ml of '''Compound A1''' to the 100ml volumetric flask by '''Trecise Transfer mode'''
+|| Transfer 100ml of '''Compound A1''' to the 100ml volumetric flask by '''Precise Transfer mode'''
 || Transfer 100ml of '''Compound A1''' to '''flask A-1 '''by '''Precise Transfer mode.'''