Calculate the unknown of Ag+ if the potential of the following concentration cell is 300 mV at 25.0 C.

Question

Ag|Ag+(unknown)||Ag+(0.100M)|Ag

I think I have to use Nernst Equation of

Ecell=E0-.0592/nlogQ

And at 25C is at 298K so i don't have to change anything. I am not sure if i just plug everything in or not.

Thank you in advance

Answer 1

Ecell=E0-(.0592/n)logQ
Eo is 0
0.3 = -0.0592*log Q
Solve for Q. Then
Q = (dilution solution)/(concentrated solution)
You have no way of knowing which the the more dilute but you can try it both ways; i.e. substitute Q and 0.1 and try it.
Q = 0.1/x and Q = x/0.1. One of the answers will not be realistic so you take the other one.

Answer 2

Thank you so much