What does the standard potential of a metal being negative ($E^{\circ}_{\mathrm{Zn^{2+}/Zn}} = -0.76$ V) indicate?

The metal is a stronger reducing agent than hydrogen — it acts as the anode when coupled with the SHE (it can displace H₂ from acids).

CBSE Class 12 · 2000 · All India · Redox Reactions and ElectrochemistryVery Short Answer

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What does the standard potential of a metal being negative (

E_{Z n^{2 +} /Zn}^{\circ} = - 0.76

V) indicate?

Solution

A negative standard electrode potential means the metal's tendency to be oxidised is greater than that of hydrogen.
Coupled with the standard hydrogen electrode, such a metal acts as the anode — it is a stronger reducing agent than H

_{2}

and can liberate hydrogen from acids.

CBSE Class 12 Board · 2000 · All India · Subjective

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