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Nernst equation

In electrochemistry, the Nernst equation (named after German physical chemist Walther Nernst) gives the reversal potential of an electrode E, relative to the standard electrochemical potential, E0, of the electrode couple or, equivalently, of the half cells of a battery

where R is the universal gas constant, T the temperature in Kelvin, z the charge number or valence of the electrode reaction, and a the chemical activities on the reduced and oxidized side, respectively. F is the Faraday constant, equal to 96,485 C mol-1.

See also: electrodiffusion.