Chapter 21.3, Problem 21LC

Interpretation Introduction

Interpretation: Some applications of electrolytic cells need to be listed.

Concept Introduction: In electrolytic cells, an electric current makes a non-spontaneous redox reaction to take place. The process by which electrical energy is converted to chemical energy is known as electrolysis.

Explanation of Solution

Applications of electrolysis cells are as follows:

Separation of elements from compounds: The electrolysis of molten ionic compounds and solution can cause the separation of elements from compounds.

Electroplating of metals: Electroplating is a process in which the deposition of a thin layer of metal takes place on an object in an electrolytic cell. This is done to protect the surface of the metal from corrosion.

Purification of metals: Impure metals can be purified in electrolytic cells. In this process, the reduction of cations of molten salts takes place at the cathode to form pure metals.

Refining of metals: In the refining of metals, impure metal is taken as an anode where its oxidation takes place and reduction of metal takes place at the cathode.