Compute the concentration of io3- in a 592 mm pbno32

Question

1) Explain what is the concentration of S2- in equilibrium with MnS(s) (Ksp = 4.6× 10-14) and 0.060 M Mn2.

2) Compute the concentration of IO3- in a 5.92 mM Pb(NO3)2 solution saturated with Pb(IO3)2. The Ksp of Pb(IO3)2 is 2.5 × 10-13. Presume that Pb(IO3)2 is a negligible source of Pb2 compared to Pb(NO3)2.