A solution is 0.20 M in Cd2+ and 0.20 M in Ca2+. NaOH solution is added slowly through a burette.
Ca(OH)2 (s) <------> Ca2+ (aq) +2OH (aq) Ksp= 5.5*10^-6
Cd(OH)2 (s) <-----> Cd2+ (aq) +2OH (aq) Ksp= 2.5*10^-14
Calculate the concentrations of hydroxide ion, calcium ion, and cadmium ion at the point of maximum separation in a selective precipitation.