Ksp

• solubility product constant• shows dissolution of “insoluble” ionic

salts

MgF2(s)

Ca3(PO4)2

Ksp values in Ch. 16 and Appendix II of textbook

Ksp

• larger value means salt is (comparatively) more soluble

• smaller value means salt is less soluble

Terminology

Solubility

Molar Solubility

grams of solute per liter of saturated solution

moles of solute per liter of saturated solution

The molar solubility of PbF2 is 2.15 x 10-

3 M. Calculate the Ksp.

Calculate the solubility of Fe(OH)3 in g/L, given Ksp = 2.79 x 10-39.