Solubility Equilibria

Please login.

As seen in previous assignments, the Review Objectives (think of them as a list of things you should have to do to be successful) are listed first, and the homework questions are below the objectives.  The homework questions for each section of this assignment are listed below a link to the OpenStax textbook that may help you with the homework questions.

This is a 9 point assignment.

Objectives: After completing this unit, students should be able to:

1. Distinguish between solubility and solubility product constant.
2. Write the dissociation equation and the K_sp expression for a salt given its name or chemical formula.
3. Calculate the K_sp given the solubility of a partially soluble salt or the solubility given K_sp.
4. Explain, using equations, the effect of a common ion on the solubility of a salt.
5. Calculate the solubility of a salt in the presence of a common ion.
6. Write the equations for the reaction that occurs to increase the solubility when an acid is added to a salt then predict whether its solubility depends on pH and calculate the molar solubility of a salt at a given pH.
7. Predict whether a precipitate will form when two solutions of known concentration of ions are mixed.
8. Predict when ions are added to a solution containing a mixture of several ions, the minimum concentration of the added ion that will cause precipitation and what salt will precipitate.

Reading and Homework Exercises

Table of Contents from: OpenStax Chemistry 2e: Chapter 15 – Equilibria of other Reaction Classes

• 15.1 Precipitation and Dissolution
• 15.3 Coupled Equilibria

Questions 1 and 2 test your ability to write correct solubility product constant (Ksp expressions for slightly soluble salts.  You may find it helpful to write a dissociation equation first.

Question 1:

Question 2:

Questions 3 and 4 test your ability to calculate solubility given solubility product constant and vice versa.

Question 3:

Question 4:

Questions 5-10 test your understanding of dissociation equations and the common ion effect in solubility equilibria.

Question 5:

Question 6:

Question 7:

Question 8:

Question 9:

Question 10:

Questions 11 and 12 test your understanding of using solubility equilibria calculations to evaluate precipitation of slightly soluble salts

Question 11:

Question 12: