A solution is 0.050 M in K2SO4 and 0.050 M in K2CrO4. A solution of Pb(NO3)2 is slowly added to this solution (without much change in volume).
(a) Which salt, PbSO4 (Ksp = 1.8x10-8) or PbCrO4 (Ksp = 1.8x10-14), will precipitate first?
(b) What is the [Pb2+] when the salt in part (a) begins to precipitate?
(c) What is the [Pb2+] when the other salt begins to precipitate?