Question

A concentration cell was constructed by immersing two silver electrodes in 0.05 M and 

1M AgNO3 solutions. Give the cell representation, write the cell reactions and calculate 

the emf of the cell.

Answer 1

Cell representation:

$Ag^0|Ag^+(0.05M)||Ag^+(1M)|Ag^0$

Cell reactions:

A(-) Ag⁰ - e^- = Ag⁺

C(+) Ag⁺ + e⁺ =Ag⁰

Calculation of the emf of the cell:

EMF = $\frac{0.0592}{z}*log( \frac{C_2}{C_1})=\frac{0.0592}{1}*log( \frac{1}{0.05})=0.077V$