Question

Describe the gas electrode give an example, with reference to formulation, electrode reaction and Nernst equation for electrode potential.

Answer 1

In the gas electrode system, the ion selective electrode method is generally used us.

The top example of such system is H2, O2, Cl2, etc. If we take the reaction of,

H2 ----- 2H+ + 2e-

Then you need to place the reaction to the Nernst equation which will be

E(H2/H) – RT/2F ln1/a^2 (H+)