Calculating Δm in a galvanic cell?

Question

Say we have a cell of Cu^2+/Cu and Ag+/Ag.

The overall equation for the reaction will be:

Cu + 2Ag+ --> Cu^2+ + Ag

If the mass of the copper electrode changes from 16.58g to 15.31, how can we calculate the change in mass of the Silver electrode?

Im guessing it is as follows, but I'm not really sure.

Δm(Cu)= 1.27g

Δn(Cu)= 0.02

Δn(Ag) = 0.02 x 2 (Because there is a ratio of 1:2)

∴ Δm(Ag) = 4.316g

is this right? Because I'm really just guessing here (The method that is, not the answer)

Answer 1

You are correct! ... although your equation needs a "2" in front of Ag.