Question

How is standard electrode potential of a cell related to equilibrium constant?

Answer 1

Answer:

Because the electrode half-reaction involves hydrogen ions, the electrode potential depends on the activity of hydrogen ions. ... For practical pH measurement, a second pH independent reference electrode (such as a silver chloride electrode) is also used. This reference electrode does not respond to the pH.

Explanation:

The SHE is the universal reference for reporting relative half-cell potentials. It is a type of gas electrode and was widely used in early studies as a reference electrode, and as an indicator electrode for the determination of pH values.