Question

A standard hydrogen electrode has zero electrode potential because ______.

Options

• hydrogen is easiest to oxidise.

• the electrode potential is assumed to be zero.

• hydrogen has only one electron.

• hydrogen is the lightest element.

Answer 1

A standard hydrogen electrode has zero electrode potential because the electrode potential is assumed to be zero.

Explanation:

The standard hydrogen electrode (SHE) is assigned a potential of zero volts by convention to serve as a reference for measuring the electrode potentials of other electrodes. It is not zero due to any physical or chemical property, but by definition.