## Quick Reference

An equation that relates the electrode potential *E* of an electrode that is in contact with an ionic solution to the ionic concentration *c*. The equation is:*E*=*E*_{⦵} – *RTzF*ln*c*, where *E*_{⦵} is the standard electrode potential, *R* is the gas constant, *T* is the absolute temperature, *z* is the valence of the ion, and *F* is the Faraday constant. The equation was derived by Walther Nernst in 1889. It is fundamental to the thermodynamics of electrochemical cells.

*E*=*E*_{⦵} – *RTzF*ln*c*

*Subjects:*
Chemistry.

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