Question

What is understood by a normal hydrogen electrode?

Answer 1

1. A reference electrode is an electrode with a known, constant potential used to measure the electrode potential of other half-cells.
2. It helps establish a standard point of comparison in electrochemical measurements. 
3. The Normal Hydrogen Electrode (NHE) is the primary reference electrode, consisting of hydrogen gas at 1 atm bubbled over a platinum electrode dipped in 1 M H⁺ solution at 25°C.
4. Its standard electrode potential is defined as 0.00 V, and it serves as a universal reference for determining the electrode potentials of other cells.