Question

what is standard hydrogen electrode​

Answer 1

The standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. ... aH+ is the activity of the hydrogen ions, aH+ = fH+CH+ / C. 0. pH2 is the partial pressure of the hydrogen gas, in pascals, Pa.

Answer 2

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The standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E°) is declared to be zero volts at any temperature. Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature.

Hydrogen electrode is based on the redox half cell:

2 H+(aq) + 2 e− → H2(g)

Explanation:

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