Snehalathak at 11:47, 25 April 2018

2018-04-25T11:47:24Z

Snehalathak at 11:21, 25 April 2018

2018-04-25T11:21:28Z

Snehalathak: Created page with " {|border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide ''' || Welcome to this spoken tutorial on '''Determination of Solubility Produc..."

2018-04-24T12:09:30Z

Created page with " {|border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide ''' || Welcome to this spoken tutorial on '''Determination of Solubility Produc..."

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

'''Title Slide '''
|| Welcome to this spoken tutorial on '''Determination of Solubility Product '''using Vlabs.

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

'''Learning Objectives '''

|| In this tutorial we will learn to,

Determine Solubility of salts, and

Calculate Solubility Product of various sparingly soluble salts.

|-
|| '''Slide Number 3'''

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

Mac OS version 10.10.5

ChemCollective Vlabs version 2.1.0 and

Java version 8.0
|-
|| '''Slide Number 4'''

'''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.
|-
|| Point to the window.
|| Here I have opened''' Virtual Chemistry labs''' application window.

|-
|| Click on '''file>>Load Homework'''.

Point at''' Default Lab Setup''' dialog-box.

Double- click on '''Solubility and Solids''' option.

Double- click on '''Determining the Solubility Product'''
|| Click on''' File '''menu and select '''Load Homework''' option.

'''Default Lab Setup''' dialog-box opens.

Double-click on '''Solubility and Solids''' option.

From the sub-menu, double-click on '''Determining the solubility product''' option.

|-
|| Cursor on chemicals, apparatus and Problem Description.

Double click on '''Problem Description''' from Stockroom Explorer.
|| A workbench opens with required chemicals and Problem Description.

Under the '''Stockroom Explorer''' double click on '''Problem Description'''.

|-
|| Cursor on '''Problem Description''' window.

Highlight relevant portions of '''Problem Description'''.
|| '''Problem Description''' window opens.

The problem states that, using Virtual labs.

We have to determine Solubility Products of

Silver chloride

Strontium Sulphate

Silver Carbonate and

Strontium Iodate.

We have to also find the solubility of the above salts in Moles/Litre.

Finally we have to compare the Solubility and Solubility Products for pairs of salts.
|-
|| Click on 'x' on the top right corner of the window.
|| Close the '''Problem Description''' window.

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

'''Solubility Product'''
|| A substance's solubility product, is the mathematical product of its dissolved ion concentrations raised to the power of their stoichiometric coefficients.

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

'''Solubility Product:Equation 1'''

'''AgCl(s) ⇌ Ag+(aq) + Cl¯(aq)'''

Stoichiometric Concentrations are

[Ag+] : [Cl-]

1 : 1

[Ag+] = S, [Cl-] = S

'''Ksp = [Ag+] [Cl¯]'''

Solubility Product <nowiki>= </nowiki>S x S <nowiki>= S</nowiki>2

|| For Example:

Solubility of Silver Chloride in its saturated solution is given as follows:

For every one mole of silver chloride that dissolves,

one mole of silver ion and one '''mole of chloride ion is''' '''produced.

Let us assign a variable '''S''' to represent solubility of Silver and Chloride ions.

Solubility Product of silver chloride is S squared.

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

'''Solubility Product:Equation 2'''

'''Ag2CO3 ⇌ 2Ag+ + CO3-2'''

[Ag+] : [CO3-2]

2 : 1

[Ag+] = 2S, [CO3-2] = S

'''Ksp = [Ag+]2 [CO3-2]'''

Solubility Product <nowiki>= (2S)</nowiki>2 x S <nowiki>= 4S</nowiki>3
|| Here is the solubility of Silver carbonate in its saturated solution.

Stoichiometric concentrations of the ions are in the ratio of 2 : 1

In this equation, solubility of silver ion is two S and carbonate ion is S.

Solubility Product of silver carbonate is four S cube.

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

'''Solubility Product:Significance'''
|| Significance of Solubility Product.

Solubility Product applies to solutions where salts do not fully dissolve. 

Water is generally used as a solvent. 

Solubility Product changes with temperature.
|-
|| '''Slide Number 9'''

'''Solubility Product:Significance'''
||Solubility Product is a heterogeneous equilibrium constant. 

The smaller the Solubility Product of a substance, the lower is its solubility. 
|-
|| '''Slide Number 10'''

'''Solubility Product:Significance'''
|| Solubility Product values are useful in predicting, the precipitation in reactions.

when the Ionic product is greater than Solubility Product, then precipitation will occur

when the Ionic product is smaller than Solubility Product, then precipitation will not occur
|-
|| Cursor on Vlabs workbench.

From the Stockroom Explorer, double-click to select,

Silver chloride

Strontium Sulphate

Silver Carbonate

Strontium Iodate.

|| Back to the workbench.

From the Stockroom Explorer, double-click to select,

Silver chloride

Silver Carbonate

Strontium Sulphate and

Strontium Iodate.
|-
|| Click on''' Select tools '''icon.

Click to select''' Scale '''

Click on''' Select tools '''icon. Click to select '''Weighing boat.'''
|| Click on''' Select tools '''icon.

Click to select''' Scale '''and '''Weighing boat.'''

|-
|| Right-click on the''' Weighing boat>> duplicate''' option.
|| For this demonstration we require 4 copies of '''Weighing boats. '''

Right-click on the ''' Weighing boat'''.

Select '''Duplicate''' option from the context menu.

A new '''weighing boat appears'''.

Similarly obtain other w'''eighing boats'''.

Rearrange the '''weighing boats''' on the workbench.

|-
|| Right-click on weighing boat>> '''Rename''' option.

Click on Ok.

Rename the weighing boats as 1, 2, 3 and 4.
|| Let us assign names to each one of them.

Right-click on the '''weighing boat'''.

Select '''Rename''' option from the context menu.

Rename the '''weighing boats''' as 1, 2, 3 and 4.

|-
|| From the Stockroom Explorer,

Double-click on '''100 mL Distilled HspO flask'''.

Right-click on the flask, use '''Duplicate''' option.
|| From the '''Stockroom Explorer''',

double-click on '''100 mL Distilled water''' flask.

'''100 mL Distilled water''' flask appears on the workbench.

Right-click on the flask.

Use '''Duplicate''' option to make 4 copies.

Rearrange 100 mL distilled water flasks on the workbench.

|-
|| Right-click on the flask, select '''Rename''' option from the context menu.

Rename the flasks as 1, 2, 3 and 4.
|| Right-click on the flask, select '''Rename''' option from the '''context menu'''.

Rename the flasks as 1, 2, 3 and 4.

|-
|| Drag the Scale.

Drag and place the boat on the scale.

Press '''TARE'''.
|| Bring the '''Scale''' to a convenient position on the workbench.

Place '''weighing boat 1 ''' on the scale.

Click '''TARE'''.

|-
|| Type 5 in the '''transfer amount input bar'''.

Click on '''Pour'''.
|| Weigh 5 grams of Silver Chloride.

Bring the Silver Chloride bottle near to the '''weighing boat 1'''.

In the '''transfer amount input bar''' , type 5.

Click on '''Pour'''.

|-
|| Drag the Silver Chloride bottle aside.

Bring the '''weighing boat 1''' to '''flask 1'''.

Type 5 in the '''transfer input bar'''. Click on '''Pour'''.

Drag and place the '''Weighing Boat '''aside.
|| Keep the Silver Chloride bottle aside.

Now let us transfer Silver Chloride to '''flask 1.'''

Bring '''weighing boat 1''' to '''flask 1'''.

Type 5 in the''' transfer '''amount input bar. Click on '''Pour'''.

Keep '''weighing Boat''' aside.

|-
|| Click on''' Flask 1.'''

Cursor on''' Solution Info Panel'''.
|| Click on '''Flask 1'''.

Observe the '''Solution Info Panel'''.

|-
|| Cursor on '''Aqueous''' radio button.

Click on the black arrow, next to '''molarity'''.

Point towards concentrations of Silver ion and Chloride ion.
|| By default '''Aqueous''' radio button is selected.

Concentrations of all the ionic species present in the solution are given here.

Click on the small black arrow, next to '''Molarity.'''

Here we can express concentrations in '''grams, moles ''' and ''' Molarity'''.

Note the concentrations of Silver ion and Chloride ion in terms of '''Molarity'''.
|-
|| Show all the steps for

'''Strontium Sulphate'''

'''Silver Carbonate''', and

'''Strontium Iodate '''
|| Similarly, using '''weighing boat,''' weigh 5 gm each of,

'''Silver Carbonate'''

'''Strontium Sulphate''', and

'''Strontium Iodate'''

Pour into '''flasks 2, 3''' and ''' 4''' respectively.

|-
|| '''Click on flasks 2, 3 and 4'''.

Wait till equilibrium is reached.
|| Click on each flask.

Wait till equilibrium is reached.

Note the concentrations of ions at equilibrium.

This value is the Solubility of that ion in its saturated solution.

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

'''Calculation Table'''
|| Note solubility values for each ion in table as shown here.

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

'''Calculation Table'''

'''(with Ksp values)'''
|| Calculate Solubility product for each salt.

Note in the table.

|-
|| Cursor on slide number 10
|| Solubility products values for Strontium salts are more when compared to silver salts.

This is because Strontium salts are more soluble in water when compared to silver salts.
|-
|| '''Slide Number 12'''

Standard Values of Solubility Product
|| The experimental values of Solubility Product are comparable with known values.

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

'''Summary '''
|| Let us summarize.

In this tutorial we have,

Determined solubility of the salts.

Calculated Solubility Product of various sparingly soluble salts.

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

'''Assignment'''
|| As an assignment,

For Strontium Sulphate and Strontium Iodate:

Write dissociation equation and Solubility Product expression.
 

Find Solubility Product of these salts at 35° C.

Observe whether dissolution of these salts is exothermic or endothermic.
|-
|| '''Slide Number15:'''

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

Please download and watch it.

|-
|| '''Slide Number16:'''

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

conducts workshops using spoken tutorials and

gives certificates on passing online tests.

For more details, please write to us.

|-
|| '''Slide Number 17:'''

'''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 on this forum.

|-
|| '''Slide Number 18:'''

'''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.
|-
|}

ChemCollective-Virtual-Labs/C3/Determination-of-Solubility-Product/English - Revision history

Snehalathak at 11:47, 25 April 2018

Snehalathak at 11:21, 25 April 2018

Snehalathak: Created page with " {|border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide ''' || Welcome to this spoken tutorial on '''Determination of Solubility Produc..."