Chapter 21, Problem 80PS

Interpretation Introduction

Interpretation: A balanced chemical equation for a chloride ion with suitable oxidizing agents is to be stated.

Concept introduction:

An oxidizing agent gains electrons and is reduced in a chemical reaction whereas a reducing agent loses electrons and is oxidized in a chemical reaction.

In any electrochemical reaction, electrons goes from one substance to another substance driven by the oxidation-reduction reaction. Electrochemical cells have two conducting electrodes, called the anode and cathode. The anode is defined as the electrode where oxidation occurs. The cathode is the electrode where reduction take place. Standard electrode potential $\left({\text{E}}^{\circ }{}_{\text{cell}}\right)$ can be calculated for both oxidation and reduction reactions. A positive value of ${\text{E}}^{\circ }{}_{\text{Cell}}$ indicates that the reaction proceeds spontaneously in the forward direction whereas, a negative value of ${\text{E}}^{\circ }{}_{\text{cell}}$ indicates that the reaction proceeds spontaneously in backward direction. The standard cell potential expression is written as follows,

${\text{E}}^{\circ }{}_{\text{cell}}={\text{E}}^{\circ }{}_{\text{cathode}}+{\text{E}}^{\circ }{}_{\text{anode}}$