Chapter 20, Problem 58A

Interpretation Introduction

Interpretation:

The reason for the large scale electrolysis of brine needs to be explained and the primary products needs to be explained.

Concept introduction:

Brine is the aqueous solution of NaCl. It is a good conductor of electricity and acts as a strong electrolyte.

Answer to Problem 58A

Brine is electrolyzed at a large scale for the manufacture of chlorine gas which is a primary product of the electrolysis. Chlorine gas is a very useful chemical and the electrolysis of brine is one of the most efficient methods for its production.

Explanation of Solution

The following reaction occurs at the cathode during the electrolysis of brine:

$2C{l}^{-}\to C{l}_2(g)$

This chlorine gas is collected and used for various chemical purposes.

Conclusion

Large scale electrolysis of brine is done primarily for the production of chlorine gas.