Difference between revisions of "PhET-Simulations-for-Chemistry/C3/Salts-and-Solubility/English"

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'''Learning Objectives'''
 
'''Learning Objectives'''
 
|| In this tutorial, we will learn about,
 
|| In this tutorial, we will learn about,
−
 
−
 
 
*Solubility of different salts.
 
*Solubility of different salts.
−
 
 
*Create a neutral compound from anions and cations.  
 
*Create a neutral compound from anions and cations.  
−
 
 
*Equilibrium expression for dissolution of salt in water.
 
*Equilibrium expression for dissolution of salt in water.
  
−
*Calculate the molarity of solutions.
+
|-
 +
|| '''Slide Number 3'''
  
−
*Calculate Solubility Product of the salts.
+
'''Learning Objectives'''
 +
||
 +
*Calculate the '''Molarity''' of solutions.
 +
*Calculate '''Solubility Product''' of the salts.
 +
*Application of '''Le Chaterlier’s principle''' to the dissolution of salts
  
 
|-
 
|-
Line 37: Line 38:
  
 
'''Learning Objectives'''
 
'''Learning Objectives'''
−
|| Application of Le Chaterlier’s principle to the dissolution of salts
+
||  
−
 
+
 
*Design a salt with various combinations of charges and Solubility Products.
 
*Design a salt with various combinations of charges and Solubility Products.
−
 
+
*Use '''Solubility Product''' values to predict solubility.
−
*Use Solubility Product values to predict solubility.
+
−
 
+
−
 
+
  
 
|-
 
|-
−
|| '''Slide Number 3'''
+
|| '''Slide Number 4'''
  
 
'''System Requirement'''
 
'''System Requirement'''
 
|| Here I am using
 
|| Here I am using
  
−
'''Windows 11 (64 bit).'''
+
*'''Windows 11 (64 bit).'''
−
 
+
*'''Java version 1.8'''
−
'''Java version 1.8'''
+
 
|-
 
|-
−
|| '''Slide Number 4'''
+
|| '''Slide Number 5'''
  
 
'''Pre-requisites'''
 
'''Pre-requisites'''
−
 
  
  
 
'''[https://spoken-tutorial.org/ https://spoken-tutorial.org]'''
 
'''[https://spoken-tutorial.org/ https://spoken-tutorial.org]'''
 +
|| To follow this tutorial learner should be familiar with topics in High School science.
  
−
 
+
−
 
+
Please use the link below to access the tutorials on '''PhET Simulations'''.
−
|| To follow this tutorial learner should be familiar with,
+
−
 
+
−
topics in high school science.
+
−
 
+
−
 
+
−
 
+
−
Please use the link below to access the tutorials on PhET Simulations.
+
−
 
+
  
 
|-
 
|-
Line 79: Line 67:
 
'''Link for PhET simulation'''
 
'''Link for PhET simulation'''
  
−
point to
+
Point to '''https://phet.colorado.edu/en/simulations/soluble-salts'''
−
 
+
−
'''https://phet.colorado.edu/en/simulations/soluble-salts'''
+
−
 
+
−
|| Please use the given link to download the PhET simulation.
+
−
 
+
−
 
+
  
 +
|| Please use the given link to download the '''PhET simulation'''.
  
  
  
 
|-  
 
|-  
−
|| '''Point to the file in Downloads folder.'''
+
|| Point to the file in '''Downloads folder.'''
−
|| I have downloaded the '''Salts & Solubility '''simulation, to my Downloads folder.
+
|| I have downloaded the '''Salts & Solubility '''simulation to my '''Downloads''' folder.
 
|-  
 
|-  
 
|| '''Double click the file to open'''
 
|| '''Double click the file to open'''
−
|| To open the simulation double click on the file.
+
|| To open the simulation double-click on the file.
 
|-  
 
|-  
 
|| '''Cursor on the interface.'''
 
|| '''Cursor on the interface.'''
−
|| This is the interface of '''salt and solubility simulation'''.
+
|| This is the interface of '''Salt and solubility simulation'''.
 
|-
 
|-
−
||  
+
|| Cursor moves across the tabs.
−
 
+
|| It has 3 tabs.  
−
Cursor moves across the tabs.
+
−
||  
+
−
 
+
−
It has 3 tabs.  
+
 
|-
 
|-
 
|| Cursor on Table Salt interface.
 
|| Cursor on Table Salt interface.
−
 
−
 
−
 
  
  
Line 131: Line 107:
 
|-
 
|-
 
|| Drag the slider on the inlet water tap.
 
|| Drag the slider on the inlet water tap.
−
 
−
 
−
 
−
 
−
Drag the slider on the outlet water tap.
 
 
|| Drag the slider on the inlet water tap towards the right side to fill the container.
 
|| Drag the slider on the inlet water tap towards the right side to fill the container.
  
−
 
+
|-
−
To drain the water from the container, drag the slider on the outlet water tap.
+
||Drag the slider on the outlet water tap.
 +
||To drain the water from the container, drag the slider on the outlet water tap.
 
|-
 
|-
 
|| Show salt shaker.
 
|| Show salt shaker.
Line 148: Line 120:
 
|-
 
|-
 
|| Cursor on right panel.
 
|| Cursor on right panel.
−
|| On the right panel you will see the Salt''' '''and '''Water '''sections.
+
|| On the right panel you will see the '''Salt''' and '''Water '''sections.
 
|-
 
|-
 
|| Cursor on right panel.
 
|| Cursor on right panel.
−
|| Salt section gives information about the ions present in the container.
+
|| '''Salt''' section gives information about the ions present in the container.
  
  
Line 157: Line 129:
 
|-
 
|-
 
|| Cursor on right panel.
 
|| Cursor on right panel.
−
|| The water section shows the volume of water in the container.  
+
|| The '''Water''' section shows the volume of water in the container.  
−
 
+
−
 
+
  
 
|-
 
|-
Line 176: Line 146:
 
|| Shake the salt shaker.  
 
|| Shake the salt shaker.  
 
|| Shake the salt shaker to add salt to the container.
 
|| Shake the salt shaker to add salt to the container.
−
 
−
 
  
 
|-
 
|-
Line 183: Line 151:
  
  
−
'''Solubility Product expression of NaCl'''
 
  
−
<sup>NaCl(s) ⇄ Na+(aq) + Cl-(aq)</sup>
 
  
−
<sup>K</sup><sub>sp</sub><sup> = [Na+] [Cl-]</sup>
 
  
 +
||
 +
*Table salt is scientifically called '''Sodium Chloride'''.
 +
*It ionizes in water as sodium and chloride ions.
  
−
|| Table salt is scientifically called Sodium Chloride.
+
|-
 +
||'''Slide Number 7'''
  
−
It ionizes in water as sodium and chloride ions.
+
'''Solubility Product expression of NaCl'''
  
 +
<sup>NaCl(s) ⇄ Na+(aq) + Cl-(aq)</sup>
  
 +
<sup>K</sup><sub>sp</sub><sup> = [Na+] [Cl-]</sup>
  
 +
||Here is the '''Solubility Product''' expression of NaCl
  
−
Here is the Solubility Product expression of NaCl
 
  
  
  
−
 
+
The smaller the '''Solubility Product''', the lower the solubility.  
−
 
+
−
 
+
−
 
+
−
 
+
−
The smaller the Solubility Product, the lower the solubility.  
+
−
 
+
−
 
+
  
 
|-
 
|-
Line 214: Line 178:
 
|| Sodium ions are represented as red spheres and chloride ions as green spheres.
 
|| Sodium ions are represented as red spheres and chloride ions as green spheres.
  
−
 
+
|-
−
Add more salt to the container and observe the solution.
+
||Shake the salt dispenser.
 +
||Add more salt to the container and observe the solution.
 
|-
 
|-
 
|| Cursor on sodium and chloride ions.
 
|| Cursor on sodium and chloride ions.
Line 221: Line 186:
 
|-
 
|-
 
|| Cursor on right panel.
 
|| Cursor on right panel.
−
|| Note the number of sodium and chloride ions in the Salt panel on the right.  
+
|| Note the number of sodium and chloride ions in the '''Salt''' panel on the right.  
  
  
Line 243: Line 208:
  
  
−
 
−
 
−
Shake the salt dispenser.
 
 
|| Sodium chloride is highly soluble in water.
 
|| Sodium chloride is highly soluble in water.
  
  
 
The bound ions will be zero until it reaches the saturation level.
 
The bound ions will be zero until it reaches the saturation level.
−
 
+
|-
−
 
+
||Shake the salt dispenser.
−
Add more salt until you see some bound ions in the Salt panel.
+
||Add more salt until you see some bound ions in the '''Salt''' panel.
 
|-
 
|-
 
|| Cursor on the right panel.
 
|| Cursor on the right panel.
Line 260: Line 222:
 
The bound or undissolved ions are in equilibrium with the dissolved ions in solution.
 
The bound or undissolved ions are in equilibrium with the dissolved ions in solution.
  
−
 
+
|-
−
Approximately 180 dissolved ions are observed.
+
||Cursor on the right panel.
 +
||Approximately 180 dissolved ions are observed.
  
  
Line 271: Line 234:
  
 
The ions continuously go back and forth from dissolved to bound state to maintain the equilibrium.
 
The ions continuously go back and forth from dissolved to bound state to maintain the equilibrium.
−
 
−
 
−
 
 
|-
 
|-
 
|| Cursor on the right panel.
 
|| Cursor on the right panel.
−
|| Molar solubility for sodium chloride can be calculated using the information in the right panel.
+
|| '''Molar solubility''' for sodium chloride can be calculated using the information in the right panel.
−
 
+
−
 
+
−
Solubility Product can be calculated from the molar solubility value for each salt.
+
−
 
+
  
  
 +
'''Solubility Product''' can be calculated from the '''Molar Solubility''' value for each salt.
 
|-
 
|-
 
|| Cursor on the right panel.
 
|| Cursor on the right panel.
−
|| Note the number of cations and anions at saturation state for sodium chloride.
+
|| Note the number of cations and anions at saturation state for '''Sodium Chloride'''.
−
 
+
−
 
+
−
It is 180 in 5 x 10<sup>-23 </sup>liters for sodium chloride.
+
−
 
+
  
  
 +
It is 180 in 5 x 10<sup>-23 </sup>liters for '''Sodium Chloride'''.
 
|-
 
|-
−
|| '''Slide Number 7'''
+
|| '''Slide Number 8'''
  
 
'''Calculations: Molar Solubility'''
 
'''Calculations: Molar Solubility'''
−
 
+
|| This slide shows how to calculate '''Molar Solubility''' for '''Sodium Chloride'''.
−
 
+
−
 
+
−
|| This slide shows how to calculate molar solubility for sodium chloride.
+
−
 
+
−
 
+
  
 
|-
 
|-
−
|| '''Slide Number 8'''
+
|| '''Slide Number 9'''
  
 
'''Calculations: Solubility Product'''
 
'''Calculations: Solubility Product'''
Line 310: Line 259:
  
  
−
|| We can also calculate Solubility Product for sodium chloride using molar solubility values.
+
|| We can also calculate '''Solubility Product''' for sodium chloride using '''Molar solubility''' values.
−
 
+
−
 
+
−
Please refer to additional reading material for details of calculations.
+
  
  
 +
Please refer to the '''Additional reading material''' for details of calculations.
  
 
|-
 
|-
Line 340: Line 287:
  
  
−
This is in accordance with Le Chatelier's principle.
+
This is in accordance with '''Le Chatelier's principle'''.
 
|-
 
|-
 
|| Drag the slider on the inlet tap.
 
|| Drag the slider on the inlet tap.
Line 346: Line 293:
 
|-
 
|-
 
|| Cursor on the simulation.
 
|| Cursor on the simulation.
−
|| Please refer to the additional material link for more information on Le Chatelier's principle.
+
|| Please refer to the '''Additional material''' link for more information on '''Le Chatelier's principle'''.
 
|-
 
|-
 
|| Click the '''Reset All '''button.  
 
|| Click the '''Reset All '''button.  
 
|| Click the '''Reset All '''button.
 
|| Click the '''Reset All '''button.
  
−
Practice with a different volume of water in the container.
+
|-
 +
||Narration only
 +
||Practice with a different volume of water in the container.
  
  
Line 368: Line 317:
 
|| The rest of the simulation interface is similar to the '''Table Salt '''screen.
 
|| The rest of the simulation interface is similar to the '''Table Salt '''screen.
 
|-
 
|-
−
|| Shake the salt dispenser.
+
|| Point to the first salt in the list
 +
 
 +
 
 +
Shake the salt dispenser.
 
|| The first salt in the list is '''Strontium Phosphate'''.
 
|| The first salt in the list is '''Strontium Phosphate'''.
  
Line 374: Line 326:
  
 
A little amount of salt is added to the container with water.
 
A little amount of salt is added to the container with water.
−
 
−
 
  
 
|-
 
|-
 
|| Cursor on the right panel.
 
|| Cursor on the right panel.
−
|| Notice the ratio of Strontium to Phosphate ions in the right panel.
+
|| Notice the ratio of '''Strontium''' to '''Phosphate''' ions in the right panel.
 
|-
 
|-
−
|| '''Slide Number 9'''
+
|| '''Slide Number 10'''
  
−
Solubility Product expression for Strontium phosphate.
+
'''Solubility Product''' expression for '''Strontium Phosphate'''.
−
|| This slide shows the Solubility Product expression for Strontium phosphate.
+
|| This slide shows the '''Solubility Product''' expression for '''Strontium phosphate.'''
  
−
The stoichiometry is 3 is to 2 (3:2).
+
The '''stoichiometry''' is 3 is to 2 (3:2).
  
−
Therefore the strontium phosphate molecule consists of:
+
Therefore the '''Strontium Phosphate''' molecule consists of:
  
−
3 atoms of strontium and 2 units of phosphate.
+
3 atoms of '''Strontium''' and 2 units of '''Phosphate.'''
 
|-
 
|-
 
|| Shake the salt dispenser.
 
|| Shake the salt dispenser.
Line 397: Line 347:
  
  
−
 
−
 
−
Observe the right panel.
 
 
|| Shake the salt dispenser a few more times.
 
|| Shake the salt dispenser a few more times.
  
  
−
You will now notice some bound strontium and phosphate ions in the container.
+
You will now notice some bound '''Strontium''' and '''Phosphate''' ions in the container.
  
−
 
+
|-
−
Observe the right panel.
+
||Observe the right panel.
 +
||Observe the right panel.
 
|-
 
|-
 
|| Shake the salt dispenser.
 
|| Shake the salt dispenser.
  
−
 
−
 
−
Observe the right panel.
 
 
|| Shake the salt dispenser a few more times until you see constant unbound ions in solution.
 
|| Shake the salt dispenser a few more times until you see constant unbound ions in solution.
  
 +
|-
 +
||Observe the right panel.
 +
||The solution is now saturated. The equilibrium is established.
  
−
The solution is now saturated. The equilibrium is established.
 
  
−
 
+
At this stage, 45 '''Strontium''' and 30 '''Phosphate''' ions are in dissolved state.
−
At this stage, 45 strontium and 30 phosphate ions are in dissolved state .
+
  
  
Line 425: Line 371:
 
|-
 
|-
 
|| Observe the right panel.
 
|| Observe the right panel.
−
|| Molar solubility for salts can be calculated using the information in the right panel.
+
|| '''Molar solubility''' for salts can be calculated using the information in the right panel.
  
  
−
Solubility Product can be calculated from the molar solubility value for each salt.
+
'''Solubility Product''' can be calculated from the '''Molar Solubility''' value for each salt.
 
|-
 
|-
−
|| '''Slide Number 10'''
+
|| '''Slide Number 11'''
  
 
'''Table Calculations: Molar solubility '''
 
'''Table Calculations: Molar solubility '''
 +
|| This slide shows how to calculate '''Molar Solubility''' for '''Strontium Phosphate'''.
  
  
  
−
|| This slide shows how to calculate molar solubility for strontium phosphate.
+
|-
 +
|| '''Slide Number 12'''
  
 +
'''Table Calculations: Solubility Product'''
  
  
−
|-
 
−
|| '''Slide Number 11'''
 
−
 
−
'''Table Calculations: Solubility Product'''
 
−
|| I have calculated the molar solubility and Solubility Product for strontium phosphate
 
  
 +
|| I have calculated the '''Molar Solubility''' and '''Solubility Product''' for '''Strontium Phosphate'''.
  
  
Line 454: Line 399:
 
|| Increase or decrease the volume of water in the container and observe the results.
 
|| Increase or decrease the volume of water in the container and observe the results.
 
|-
 
|-
−
|| '''Slide Number 12'''
+
|| '''Slide Number 13'''
  
 
'''Assignment'''
 
'''Assignment'''
 
|| You can pause the video and do the following:
 
|| You can pause the video and do the following:
  
−
 
+
#Add more water to the container and observe the dissolved and bound ions in water.
−
Add more water to the container and observe the dissolved and bound ions in water.
+
#Check the solubility of the salts given in the salt drop-down on the right panel.
−
 
+
#Note the ratio of ions in each salt.
−
 
+
#Note the number of ions at saturation for each salt.
−
Check the solubility of the salts given in the salt drop-down on the right panel.
+
−
 
+
−
 
+
−
Note the ratio of ions in each salt.
+
−
 
+
−
 
+
−
Note the number of ions at saturation for each salt.
+
−
 
+
−
 
+
  
 
|-
 
|-
Line 486: Line 422:
 
|| I will select cation charge as +2 and anion as -1.
 
|| I will select cation charge as +2 and anion as -1.
 
|-
 
|-
−
|| Select the Solubility Product as 1 x 10<sup>-19</sup>
+
|| Select the '''Solubility Product''' as 1 x 10<sup>-19</sup>
−
|| I will select the Solubility Product as 1 x 10<sup>-19</sup>.
+
|| I will select the '''Solubility Product''' as 1 x 10<sup>-19</sup>.
 
|-
 
|-
 
|| Shake the salt dispenser.  
 
|| Shake the salt dispenser.  
 
|| Shake the salt dispenser over the container of water.
 
|| Shake the salt dispenser over the container of water.
  
−
 
+
|-
−
Observe the ratio of dissolved cations and anions.
+
||Cursor on right panel
 +
||Observe the ratio of dissolved cations and anions.
  
  
Line 506: Line 443:
 
||  
 
||  
  
−
Select Solubility Product as 1 x 10<sup>-7</sup>.
+
Select '''Solubility Product''' as 1 x 10<sup>-7</sup>.
 
||  
 
||  
  
−
Now increase the Solubility Product of the salt to 1x10<sup>-7</sup>.
+
Now increase the '''Solubility Product''' of the salt to 1x10<sup>-7</sup>.
 
|-
 
|-
 
|| Shake the salt dispenser over the container of water.
 
|| Shake the salt dispenser over the container of water.
Line 522: Line 459:
 
The number of dissolved ions is more this time.
 
The number of dissolved ions is more this time.
  
−
Hence, solubility is more when Solubility Product value is more.
+
Hence, solubility is more when '''Solubility Product''' value is more.
 
|-
 
|-
−
|| '''Slide Number 13'''
+
|| '''Slide Number 14'''
  
 
'''Summary'''
 
'''Summary'''
Line 531: Line 468:
  
 
In this tutorial we have learnt about,
 
In this tutorial we have learnt about,
−
 
−
 
 
*Solubility of different salts
 
*Solubility of different salts
−
 
 
*Created a neutral compound from anions and cations  
 
*Created a neutral compound from anions and cations  
−
 
 
*Equilibrium expression for dissolution of salt in water.
 
*Equilibrium expression for dissolution of salt in water.
−
 
−
*Calculated the molarity of solutions
 
−
 
−
*Calculated Solubility Product of salts
 
−
 
−
 
  
 
|-
 
|-
−
|| '''Slide Number 14'''
+
|| '''Slide Number 15'''
  
 
'''Summary'''
 
'''Summary'''
−
|| Application of Le Chatelier's principle to the dissolution of salts
+
||  
−
 
+
*Calculated the '''Molarity''' of solutions
−
*Designed a salt with various combinations of charges and Solubility Products.
+
*Calculated '''Solubility Product''' of salts
−
 
+
*Application of '''Le Chatelier's principle''' to the dissolution of salts
−
*Used Solubility Product values to predict solubility.
+
 
|-
 
|-
 
|| '''Slide Number 15'''
 
|| '''Slide Number 15'''
 +
 +
'''Summary'''
 +
||
 +
*Designed a salt with various combinations of charges and '''Solubility Products'''.
 +
*Used '''Solubility Product''' values to predict solubility.
 +
|-
 +
|| '''Slide Number 16'''
  
 
'''Assignment'''
 
'''Assignment'''
Line 564: Line 497:
  
 
As an assignment,
 
As an assignment,
−
 
+
#Explore more salts with various combinations of charges and '''Solubility Products'''.
−
 
+
#Calculate the '''Molar Solubility''' and '''Solubility Product''' for the salts.
−
Explore more salts with various combinations of charges and Solubility Products.
+
−
 
+
−
 
+
−
Calculate the molar solubility and Solubility Product for the salts.
+
−
 
+
−
 
+
−
 
+
−
 
+
  
 
|-
 
|-
−
|| '''Slide Number 16'''
+
|| '''Slide Number 17'''
  
 
'''About Spoken Tutorial Project '''
 
'''About Spoken Tutorial Project '''
−
||The video at the following link  
+
||
−
 
+
*The video at the following link summarises the Spoken Tutorial project.
−
 
+
−
 
+
−
 
+
−
 
+
−
Summarises the Spoken Tutorial project  
+
−
 
+
  
 
*Please download and watch it.  
 
*Please download and watch it.  
−
 
  
 
|-
 
|-
−
|| '''Slide Number 17'''
+
|| '''Slide Number 18'''
 
'''Spoken tutorial workshops '''
 
'''Spoken tutorial workshops '''
−
||We conduct workshops using spoken tutorials and give certificates.  
+
||
 +
*We conduct workshops using spoken tutorials and give certificates.  
 
*For more details, please contact us.  
 
*For more details, please contact us.  
−
 
  
 
|-
 
|-
−
|| '''Slide Number 18'''
+
|| '''Slide Number 19'''
  
 
'''Answers for THIS Spoken Tutorial '''
 
'''Answers for THIS Spoken Tutorial '''
  
−
Do you have questions in THIS Spoken Tutorial?
+
|| Please post your timed queries in this forum.
−
 
+
−
Please visit this site
+
−
 
+
−
Choose the minute and second where you have the question.
+
−
 
+
−
Explain your question briefly
+
−
 
+
−
The spoken tutorial project will ensure answer.
+
−
 
+
−
You will have to register on this website to ask questions.
+
−
|| * <div style="margin-left:1.245cm;margin-right:0cm;">Please post your timed queries in this forum.
+
  
  
 
|-
 
|-
−
|| '''Slide Number 19'''
+
|| '''Slide Number 20'''
 
'''Acknowledgement '''
 
'''Acknowledgement '''
 
|| Spoken Tutorial project is funded by Ministry of Education (MoE), Govt. of India  
 
|| Spoken Tutorial project is funded by Ministry of Education (MoE), Govt. of India  
Line 626: Line 533:
  
  
−
This is Vidhi Thakur, a FOSSEE
+
This is Vidhi Thakur, a FOSSEE summer fellow 2022, IIT Bombay  
−
 
+
signing off.
−
summer fellow 2022, IIT Bombay
+
−
 
+
−
signing off
+
  
 
Thank you for joining.  
 
Thank you for joining.  
 
|-
 
|-
 
|}
 
|}

Revision as of 16:25, 7 December 2022

Salts and Solubility


Author: Snehalatha Kaliappan

Keywords: Salts, sparingly soluble salts, solubility, molar solubility, solubility product, molarity, Le Chaterlier’s principle, equilibrium expression, video tutorial


Visual Cue Narration
Slide Number 1

Title Slide

Welcome to this tutorial on Salts and Solubility
Slide Number 2

Learning Objectives

In this tutorial, we will learn about,
  • Solubility of different salts.
  • Create a neutral compound from anions and cations.
  • Equilibrium expression for dissolution of salt in water.
Slide Number 3

Learning Objectives

  • Calculate the Molarity of solutions.
  • Calculate Solubility Product of the salts.
  • Application of Le Chaterlier’s principle to the dissolution of salts
Slide Number 3

Learning Objectives

  • Design a salt with various combinations of charges and Solubility Products.
  • Use Solubility Product values to predict solubility.
Slide Number 4

System Requirement

Here I am using
  • Windows 11 (64 bit).
  • Java version 1.8
Slide Number 5

Pre-requisites


https://spoken-tutorial.org

To follow this tutorial learner should be familiar with topics in High School science.


Please use the link below to access the tutorials on PhET Simulations.

Slide Number 5

Link for PhET simulation

Point to https://phet.colorado.edu/en/simulations/soluble-salts

Please use the given link to download the PhET simulation.


Point to the file in Downloads folder. I have downloaded the Salts & Solubility simulation to my Downloads folder.
Double click the file to open To open the simulation double-click on the file.
Cursor on the interface. This is the interface of Salt and solubility simulation.
Cursor moves across the tabs. It has 3 tabs.
Cursor on Table Salt interface.


Table Salt tab opens first by default.


The main panel shows a container with inlet and outlet water taps.

Show the location of inlet and outlet taps. Inlet water tap is placed at the top-left of the container.


Outlet water tap is placed at the bottom-left of the container.

Cursor on container. The container is graduated and is filled with water.


The markings show from 1x 10-23 Liters to 8x 10-23 Liters.

Drag the slider on the inlet water tap. Drag the slider on the inlet water tap towards the right side to fill the container.
Drag the slider on the outlet water tap. To drain the water from the container, drag the slider on the outlet water tap.
Show salt shaker. A salt shaker is placed at the top of the container.


Shake the salt dispenser to add salt to the container.

Cursor on right panel. On the right panel you will see the Salt and Water sections.
Cursor on right panel. Salt section gives information about the ions present in the container.


It shows the number of dissolved, bound and total number of ions in the container.

Cursor on right panel. The Water section shows the volume of water in the container.
Cursor on Reset All button. Click on the Reset All button on the right panel.


To reset the simulation to the default parameters.

Cursor on the water container. Let us see how table salt dissolves in water.


Let the water level in the container be at the default level, 5x10-23 liters mark.

Shake the salt shaker. Shake the salt shaker to add salt to the container.
Slide Number 6



  • Table salt is scientifically called Sodium Chloride.
  • It ionizes in water as sodium and chloride ions.
Slide Number 7

Solubility Product expression of NaCl

NaCl(s) ⇄ Na+(aq) + Cl-(aq)

Ksp = [Na+] [Cl-]

Here is the Solubility Product expression of NaCl



The smaller the Solubility Product, the lower the solubility.

Cursor on sodium and chloride ions. Sodium ions are represented as red spheres and chloride ions as green spheres.
Shake the salt dispenser. Add more salt to the container and observe the solution.
Cursor on sodium and chloride ions. As soon as the salt touches the water it dissociates into sodium ions and chloride ions.
Cursor on right panel. Note the number of sodium and chloride ions in the Salt panel on the right.


They are equal in number.

The sodium chloride is neutral molecule

It has one positive sodium ion and one negative chloride ion.

Shake the salt dispenser.


180 ions in solution, no bound ions.

Add more salt to the container.

Observe the right panel.

Wait for a few seconds for the solution to reach equilibrium.

Cursor on the water container.


Sodium chloride is highly soluble in water.


The bound ions will be zero until it reaches the saturation level.

Shake the salt dispenser. Add more salt until you see some bound ions in the Salt panel.
Cursor on the right panel. The salt solution has now reached saturation level.


The bound or undissolved ions are in equilibrium with the dissolved ions in solution.

Cursor on the right panel. Approximately 180 dissolved ions are observed.


Notice the continuous adjustment of dissolved and bound ions on the panel.

Cursor on the water container. Observe the ions in the container.


The ions continuously go back and forth from dissolved to bound state to maintain the equilibrium.

Cursor on the right panel. Molar solubility for sodium chloride can be calculated using the information in the right panel.


Solubility Product can be calculated from the Molar Solubility value for each salt.

Cursor on the right panel. Note the number of cations and anions at saturation state for Sodium Chloride.


It is 180 in 5 x 10-23 liters for Sodium Chloride.

Slide Number 8

Calculations: Molar Solubility

This slide shows how to calculate Molar Solubility for Sodium Chloride.
Slide Number 9

Calculations: Solubility Product


We can also calculate Solubility Product for sodium chloride using Molar solubility values.


Please refer to the Additional reading material for details of calculations.

Cursor on Simulation interface.


Back to the simulation.


Add more salt.

The number of bound ions increases in the solution.

Drag the slider on the inlet tap. Add some water to the container.

Observe the ions in the panel as well as in the container.

Cursor on the simulation. The number of dissolved ions increases with dilution.

This is because the bound ions now dissolve in the extra added water.


This is in accordance with Le Chatelier's principle.

Drag the slider on the inlet tap. Add more water until all the bound ions completely dissolve.
Cursor on the simulation. Please refer to the Additional material link for more information on Le Chatelier's principle.
Click the Reset All button. Click the Reset All button.
Narration only Practice with a different volume of water in the container.


Observe the results.

Click on Slightly Soluble Salts tab. Next click on Slightly Soluble Salts tab.


The right panel on the screen shows a drop-down in the Salt section.

Cursor on the right panel. 6 different types of sparingly soluble salts are listed here.
The rest of the simulation interface is similar to the Table Salt screen.
Point to the first salt in the list


Shake the salt dispenser.

The first salt in the list is Strontium Phosphate.

Shake the salt dispenser.

A little amount of salt is added to the container with water.

Cursor on the right panel. Notice the ratio of Strontium to Phosphate ions in the right panel.
Slide Number 10

Solubility Product expression for Strontium Phosphate.

This slide shows the Solubility Product expression for Strontium phosphate.

The stoichiometry is 3 is to 2 (3:2).

Therefore the Strontium Phosphate molecule consists of:

3 atoms of Strontium and 2 units of Phosphate.

Shake the salt dispenser.



Shake the salt dispenser a few more times.


You will now notice some bound Strontium and Phosphate ions in the container.

Observe the right panel. Observe the right panel.
Shake the salt dispenser. Shake the salt dispenser a few more times until you see constant unbound ions in solution.
Observe the right panel. The solution is now saturated. The equilibrium is established.


At this stage, 45 Strontium and 30 Phosphate ions are in dissolved state.


The ratio is 3: 2

Observe the right panel. Molar solubility for salts can be calculated using the information in the right panel.


Solubility Product can be calculated from the Molar Solubility value for each salt.

Slide Number 11

Table Calculations: Molar solubility

This slide shows how to calculate Molar Solubility for Strontium Phosphate.


Slide Number 12

Table Calculations: Solubility Product


I have calculated the Molar Solubility and Solubility Product for Strontium Phosphate.


Make a data table as shown here in your notebook and fill the columns.

Cursor on the simulation interface. Increase or decrease the volume of water in the container and observe the results.
Slide Number 13

Assignment

You can pause the video and do the following:
  1. Add more water to the container and observe the dissolved and bound ions in water.
  2. Check the solubility of the salts given in the salt drop-down on the right panel.
  3. Note the ratio of ions in each salt.
  4. Note the number of ions at saturation for each salt.
Click on Design a Salt tab. Now click on Design a Salt tab at the top of the simulation.
Cursor on the simulation interface. Here we can creatively design a salt using the different charges for cation and anion.
Cursor on the right panel. On the right panel using the drop-down buttons select the charges of your choice.
Select cation charge as +2 and anion as -1. I will select cation charge as +2 and anion as -1.
Select the Solubility Product as 1 x 10-19 I will select the Solubility Product as 1 x 10-19.
Shake the salt dispenser. Shake the salt dispenser over the container of water.
Cursor on right panel Observe the ratio of dissolved cations and anions.


We see two anions for every one cation.


The number of anions is double the number of cations.


This ratio is in accordance with the charges we selected for cation and anion for the salt.

Select Solubility Product as 1 x 10-7.

Now increase the Solubility Product of the salt to 1x10-7.

Shake the salt dispenser over the container of water. Shake the salt dispenser over the container of water.

Observe the number of dissolved ions in the right panel.

Cursor on the right panel. Notice the solubility of the salt.


The number of dissolved ions is more this time.

Hence, solubility is more when Solubility Product value is more.

Slide Number 14

Summary

Let us summarize.


In this tutorial we have learnt about,

  • Solubility of different salts
  • Created a neutral compound from anions and cations
  • Equilibrium expression for dissolution of salt in water.
Slide Number 15

Summary

  • Calculated the Molarity of solutions
  • Calculated Solubility Product of salts
  • Application of Le Chatelier's principle to the dissolution of salts
Slide Number 15

Summary

  • Designed a salt with various combinations of charges and Solubility Products.
  • Used Solubility Product values to predict solubility.
Slide Number 16

Assignment


Show table here.

As an assignment,

  1. Explore more salts with various combinations of charges and Solubility Products.
  2. Calculate the Molar Solubility and Solubility Product for the salts.
Slide Number 17

About Spoken Tutorial Project

  • The video at the following link summarises the Spoken Tutorial project.
  • Please download and watch it.
Slide Number 18

Spoken tutorial workshops

  • We conduct workshops using spoken tutorials and give certificates.
  • For more details, please contact us.
Slide Number 19

Answers for THIS Spoken Tutorial

Please post your timed queries in this forum.


Slide Number 20

Acknowledgement

Spoken Tutorial project is funded by Ministry of Education (MoE), Govt. of India
The script for this tutorial is contributed by Snehalatha Kaliappan from IIT Bombay.


This is Vidhi Thakur, a FOSSEE summer fellow 2022, IIT Bombay signing off.

Thank you for joining.

Contributors and Content Editors

Madhurig, Nancyvarkey, Vidhithakur

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