Technology Type

Type

HCl Electrolysis

Process

Decompositions reactions

Abbreviation

Electrolysis of hydrochloric acid is a way of splitting up (decomposition) of the compound hydrogen chloride in water using electrical energy. The electrical energy comes from a d.c. (direct current) battery or power pack supply. A conducting liquid, containing ions, called the electrolyte (hydrochloric acid), must contain the compound hydrogen chloride that is being broken down.

The products of electrolysing hydrochloric acid are hydrogen gas and chlorine gas according to the equation:

2 HCl(aq) → Cl₂(g) + H₂(g)

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