Question

Write Nearst equation and explain the terms involved in it. What part of the equation represent the correction factor for nonstandard state conditions?

Answer 1

Let us consider a reaction, $aA+bB\to cC+dD$

Therefore, Nernst equation is as follows :-

$E_{cell}=E_{cell}^0-\frac{2.303RT}{nF}log\frac{{\left[C\right]}^c{\left[D\right]}^d}{{\left[A\right]}^a{\left[B\right]}^b}$

where, $E_{cell}=$ potential of cell at given conditions

$E_{cell}^0=$ potential of cell at standard conditions

$n\to$ number of electrons involved in the reaction

$F=$ Faraday's constant $=96500C$

The correction factor for non-standard state conditions is represented by $\frac{-2.303RT}{nF}log\frac{{\left[C\right]}^c{\left[D\right]}^d}{{\left[A\right]}^a{\left[B\right]}^b}$

where, $R$ is universal gas constant.

$T$ is temperature in kelvin.