Nernst's equation

 (1) Nernst's equation for the electrode potential can be described as

The potential of the electrode at which the reaction, 

takes place is described by the equation, 

or 

above eq. is called the Nernst equation.

Where,

E_Mⁿ⁺/M = potential of the electrode at the given concentration,

E⁰_Mⁿ⁺/M = the standard electrode potential

R = the universal gas constant, which is 8.31 JKmol^-1

T= temperature on absolute scale,

n = number of electrons involved in electrode reaction,

F = the Faraday constant: (96500 C),

[M(s)] = concentration of deposited metal,

[Mⁿ⁺(aq) = molar concentration of metal ion in the solution,

The concentration of pure metal M(s) is taken as unity. So, the Nernst equation for the  electrode is written as,

At 298 K, the Nernst equation for the  Mⁿ⁺/M electrode can be written as,

For an electrode (half - cell) corresponding to the electrode reaction,

Oxidised form +ne^- - Reduced form

The Nernst equation for the electrode is written as,

At 298 K, the Nernst equation can be written as,

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