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Electrochemistry & Redox

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Electrochemistry & Redox

Overpotential

The extra voltage beyond the theoretical value that must be applied before an electrode reaction proceeds at a useful rate.

η = E_applied − E_equilibrium V
Electrochemistry & Redox

Oxidation

The loss of electrons by a species, accompanied by an increase in its oxidation number.

M → Mⁿ⁺ + n e⁻ Dimensionless
Electrochemistry & Redox

Oxidation Number

The hypothetical charge an atom would carry if all its bonds were treated as fully ionic.

Σ oxidation numbers = overall charge Dimensionless
Electrochemistry & Redox

Oxidising Agent

A species that accepts electrons from another substance and is itself reduced in the process.

V