How do I write the solubility equillibrim equations that are described by the following Ksp?

Question

A. Ksp= [Pb 2+][Cl-]^2

 

B. Ksp=[Mg 2+]^3 [PO4 3-]^3

 

C. Ksp= [Sr 2+][CO2 3-]

 

D. Ksp= [Hg2 2+][ Cl-]^2

Answer 1

A.  PbCl₂(s) <==> Pb²⁺(aq) + 2Cl^-(aq)

 

B.  Mg₃(PO₄)₂(s) <==> 3Mg²⁺(aq) + 2PO₄^3-(aq)

 

Get the idea?  You should be able to complete C and D