When 100 mL each of 2.0 × 10-4 M Ca2+ and 2.0 × 10-2 M F- are
mixed, what is the remaining Ca2+ ion concentration ? The
solubility product constant of CaF2 is 5.3 × 10-9. (Hint: Determine
the limiting reactant, the concentration of excess reactant after
precipitation, and how the concentration of excess reactant
influences the solubility of CaF2).