What is standard reduction potential, e° for the half reaction mg2+(aq)+2e- mg(s)

-2.372 V

Explanation:

The standard reduction potential is the potential of a cell in which a standard hydrogen electrode (SHE) is one of the half-cells.

The standard potential of a SHE is defined as 0 V.

Mg²⁺(aq) + 2e⁻ ⟶ Mg(s);                     E° =  x        V

H₂(g) ⟶ 2H⁺(aq) +2e⁻;                        E° =  0        V

Mg²⁺(aq) + H₂(g) ⟶ Mg(s) + 2H⁺(aq); E° = -2.372 V

x + 0 = -2.372

x = -2.372

The standard reduction potential of Mg is -2.372 V .

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