Chapter 19, Problem 19.18QP

Interpretation Introduction

Interpretation:

Nernst equation for the given electrode reaction should be written and reason for electrolysis of concentrated Sodium chloride release Chlorine gas rather than Oxygen gas at anode should be explained.

Concept Introduction:

Nernst equation:

The relationship between standard cell potential and cell potential at non standard conditions and the reaction quotient are given by Nernst equation it is,

${\text{E}}_{\text{cell}}\text{=}{\text{E°}}_{\text{cell}}\text{-}\frac{\text{2}\text{.303}\text{RT}}{\text{nF}}\text{logQ}$

Where,

$\begin{array}{l}{\text{E}}_{\text{cell}}\text{ is}\text{cell potential}\\ {\text{E°}}_{\text{cell}}\text{is}\text{standard cell potential}\\ \text{R}\text{is}\text{gas}\text{constant}\\ \text{T}\text{is}\text{temperature}\\ \text{Q}\text{is}\text{reaction quotient}\end{array}$

Electrolysis:

Decomposition of Chemical, when the electric current is passing through into its ionic solution is known as electrolysis.