Sodium metal and chlorine gas can, however, be formed from the electrolysis of salt, in
which an electric current is passed through the molten sodium chloride. Electric current
Electrolysis is used in industry to purify metals, such as copper and aluminum, and in electroplating,
the process used, for example, to deposit the chrome on the bumper of a 1955 Chevy.
As you will see below, a similar process is used to refresh rechargeable batteries.