In this video we want to discuss how to determine solubility of a sparingly soluble salt from its solubility product Ksp.
But first we need to establish the fact that Ksp and solubility are both related to a saturated solution.
1. Solubility Product Ksp and Saturated Solution
When a salt dissolves and the solution is diluted, the concentration of ions is expected to continue to increase.
This means the system is not at equilibrium and equilibrium constant Ksp is not relevant for a diluted solution.
When the solution is saturated, the concentration of ions is at its maximum and constant.
Hence the system is now at equilibrium and Ksp is relevant for a saturated solution.
2. Solubility and Saturated Solution
Solubility is the amount of salt that dissolves to give a saturated solution.
Therefore solubility is directly related to a solution that is saturated.
Since both Ksp and solubility are related to a saturated solution, this means Ksp and solubility are related to each other, and we can use one of the value to find the other.
3. Dissocation of Sparingly Soluble Salt CaF2
Let's use CaF2 as an example.
When CaF2 is put in a beaker of water, it'll dissociate partially to form Ca2+ and F- ions.
We can represent this using the following equation.
If we let x be the solubility of CaF2, x moles of CaF2 will dissolve to give a saturated solution which contains x moles of Ca2+ and 2x moles of F-.
We can now write out the solubility product and express this in terms of solubility x to work out the relationship between Ksp and x.
This means that if Ksp is given, we can determine solubility of the salt, and vice versa.
For the detailed step-by-step discussion on how to determine solubility of a sparingly soluble salt from its solubility product Ksp, check out this video!
Topic: Solubility Product, Physical Chemistry, A Level Chemistry, Singapore
Found this video useful?
Please LIKE this video and SHARE it with your friends!
Any feedback, comments or questions to clarify?
Suggestions for new video lessons?
Drop them in the COMMENTS Section, I would love to hear from you!
You can also view this video lesson with screenshots and detailed explanation at https://chemistryguru.com.sg/solubili...
Do check out the following for more video lessons:
Physical Chemistry Videos at https://chemistryguru.com.sg/a-level-...
A Level Chemistry Videos at https://chemistryguru.com.sg/a-level-...
If you are looking for H2 Chemistry Tuition, do consider taking up my classes at Bishan. More info at https://chemistryguru.com.sg/
Or you can save both time and cost by learning A Level Chemistry online! Find out more at https://chemistryguru.com.sg/a-level-...
-~-~~-~~~-~~-~-
Please watch my latest video: "Determine Limiting Reagent"
https://www.youtube.com/watch?v=rdJsG...
-~-~~-~~~-~~-~-
Solubility Product and Solubility of a Sparingly Soluble Salt | |
| 5 Likes | 5 Dislikes |
| 141 views views | 1,940 followers |
| Education | Upload TimePublished on 27 Nov 2018 |
Không có nhận xét nào:
Đăng nhận xét