7.6 Solubility Equilibrium & the Solubility Product Constant

Question 1

Solubility Equilibrium

Answer 1

A dynamic equilibrium between a solute and a solvent in a saturated solution in a closed system

Question 2

When does a dynamic equilibrium form?

Answer 2

When the rate of dissolution equals the rate of precipitation

Question 3

Dissolution

Answer 3

A solid compound dissociates and dissolves into its ions

Question 4

Precipitation

Answer 4

The aqueous ions collide and reform the solid

Question 5

What is the solubility product constant (Ksp)?

Answer 5

The equilibrium constant for a solid ionic substance dissolving in an aqueous solution

Question 7

When is the Ksp value higher?

Answer 7

When a substance is more soluble

Question 8

What happens when anions and cations are more highly charged?

Answer 8

• They are less soluble
• It takes more energy to break the ionic bonds in the crystal lattice

Question 9

What is the molar solubility of an ionic compound?

Answer 9

The maximum quantity that will dissolve in a given volume of solvent at a particular temp to form a saturated solution

Question 10

What is Ksp based on?

Answer 10

• Concentration
• Does not change with the amount of solute or solvent

Question 11

Common Ion Effect

Answer 11

If a common ion is added, the equilibrium shifts towards the reactants