Determine the value of the equilibrium constant for each of the following reactions. Each reaction is the sum of simpler reactions.
a) Cu(OH)2(s) + 2H3O+(aq) <--> Cu2+(aq) + 4H2O(l)
b) 2Ag(CN)2-(aq) + SO4^2-(aq) <--> Ag2SO4(s) + 4CN-(aq)
c) PbCl2(s) + 2F-(aq) <--> PbF2(s) + 2Cl-(aq)