Chapter 21.2, Problem 15LC

Interpretation Introduction

Interpretation: The calculation of the standard reduction potential of a half-cell needs to be explained.

Concept Introduction: In an electrolyte or voltaic cell, half-cell is half of the cell where either oxidation or reduction takes place. Here, two half-cells are the anode and cathode. At the anode, oxidation takes place and at the cathode, reduction takes place.

The overall cell potential is calculated from the standard electrode potential of the half-reactions taking place in the half-cells.

Explanation of Solution

The standard reduction potential of a half-cell can be calculated by connecting the half-cell with a reference electrode. After connecting a half-cell with a reference electrode, the potential difference between the two half-cells can be calculated. Here, the reduction potential of the reference electrode is known the reduction potential of the half-cell can be calculated by subtracting the known value from the calculated potential difference.