Chapter 21, Problem 58A

Interpretation Introduction

Interpretation: The reason why it is not possible to measure the potential of an isolated half-cell needs to be explained.

Concept Introduction: An electrolytic cell is used to convert electrical energy to chemical energy. Here, an electrolytic cell uses electrical energy to make a non-spontaneous redox reaction to go on completion.

Explanation of Solution

In the case of an isolated half-cell, it is not possible to measure the electrical potential of the half-cell. For a half-cell reaction, (either oxidation or reduction) and no complete redox reaction takes place. Thus, no electrical potential can be measured.