Question

By convention, the potential of standard hydrogen electrode at all temperature is :

• A. 0 V
• B. 1 V
• C. 10 V
• D. 100 V

Answer 1

The correct option is A 0 V

The standard hydrogen electrode is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. To form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential $\left(E^o\right)$ is declared to be zero at all temperatures. Potentials of any other electrode is compared with that of the standard hydrogen electrode at the same temperature.