An aqueous solution of
KF is add dropwise to an aqueous micture containing 0.25M Ca2+ and 0.75M Mg2+
calcuate the minimum molarity of F that is nessaryvto initate the precipitation of each salt? Which precipitate first?
Ksp of CaF2 :5.4x10^-9
Ksp of MgF2 :3.6x10^-8