Calculate cell potential when concentrations aren't 1M, but are the same.

[VertiGhost]

Homework Statement

Calculate standard potential for a Cu2+ 0.5M, Zn2+ 0.5M cell.

Homework Equations

Ecell = E0cell - (RT/nF)lnQ

The Attempt at a Solution

So, I know at standard conditions it would simply be
Ecell = 0.340 - (-0.763)
Ecell = 1.103

It's the concentrations that are confusing me. If they are the same and no half reactions are multiplied, I get a Q value of 1.
lnQ = ln(1) = 0.
So in this case does it not matter what the concentrations are as long as they are the same?

 

[Borek]

In this case potentials of both half reactions are shifted by the same amount, so the final result stays the same. It doesn't have to be always this way.

 

[VertiGhost]

Sorry for the delayed thank you, but thank you :)