NERNST EQUATION

NERNST EQUATION :

The relationship between the concentration of ions and electrode potential is given by Nernst equation.

For a electrochemical cell,

Concentration of pure solids and liquids is taken as unity.

Nernst equation and K_c.

At equilibrium :

Here, ΔG° is the standard Gibbs free energy change.

Relationship between free energy change and equilibrium constant

                                   ΔG° = – 2.303RT log K_c.