A solution contains 0.20 M Cl- and 0.20 M SO4^2-.

Question

a) identify a cation that could be added to the solution to give a precipitate with only one of these anions.

MY answer: Cu+

b) write the net ionic equation for the precipitation reaction in part a)

MY answer: Cl^- + Cu^+ ==> Cu^+ + Cl^-

thank you, Im not very sure how to do b...