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.