Question

In the copper-silver cell, why must the Cu2+ and Ag+ solutions be kept in separate in containers?

Answer 1

If you have a Ag electrode dipping into the mixed solution and a Cu electrode dipping into the mixed solution, you get the battery reaction up front; i.e.,
Cu + 2Ag^+ ==> Cu^2+ + Ag(s)

Answer 2

I think best✌👍🏻👌