Practice: Determine the equilibrium expression of the barium nitride solid.

**Solubility Product Constant (Ksp**) is associated with any ionic compound, which measures how soluble the compound will be in a solvent.

Concept #1: Solubility Product Constant (Ksp)

Example #1: Which substance is the most soluble?

a) AgCl Ksp = 1.6 x 10^{-10}

b) MgCO_{3} Ksp = 3.5 x 10^{-8}

c) CaSO_{4} Ksp = 7.1 x 10^{-5}

d) CuS Ksp = 8.5 x 10^{-45}

Concept #2: Equilibrium Expressions

Example #2: Provide the equilibrium expression for calcium nitrate, Ca(NO_{3})_{2}.

Concept #3: Calculating Ksp from Solubility

Concept #4: Calculating Solubility from Ksp

Practice: Determine the equilibrium expression of the barium nitride solid.

Practice: Manganese (V) hydroxide has a measured solubility of 3.4×10^{–5} M at 25ºC. Calculate its K_{sp} value.

Practice: The K_{sp} value for strontium fluoride, SrF_{2}, is 7.9×10^{–10} at 25ºC. Calculate its solubility in g/L.