Solubility Product

Question 1

What is the general formula when ions dissolve?

AaBb

Answer 1

aA^b+ + bB^a-

Question 2

What does Ksp tell us?

Answer 2

How soluble a salt is

Question 3

How does the magnitude of Ksp link to solubility

Answer 3

Small Ksp is less soluble
large Ksp is more soluble

Question 4

Is Ksp temperature dependent

Answer 4

yes

Question 5

What are the units of Ksp?

Answer 5

They need to be calculated! Like all K calculations

Question 6

What methodology could we follow to determine solubility?

Answer 6

Titration until precipitate forms

Question 7

What occurs at saturation point?

Answer 7

There is an equilibrium between insoluble precipitate and ions in solution.

Question 8

What steps would you need to do in order to solve a Ksp calculation?

Answer 8

1. Find the ratio it splits to and then the corresponding concentrations
2. Then put into the Ksp equation

Question 9

What assumption do we make?

Answer 9

Volume doesn’t change upon dissolving

Question 10

If I have x moles of Ca(OH)2 how many moles of Ca ions and OH ions would i have?

Answer 10

x moles of Ca2+

2x moles of OH- ions

Remember the ratios