Hydrogen chloride (HCl)

Definition

Hydrogen chloride is an acidic compound formed by the reaction between hydrogen gas (H₂) and chlorine gas (Cl₂). It is a colorless gas with a sharp, pungent odor and is widely used in industry.

Related terms

Acid:

A substance that donates protons (H⁺ ions) when dissolved in water, resulting in an increase in H⁺ concentration.

Dissociation:

The process through which an ionic compound breaks apart into its constituent ions when dissolved or melted.

Acid-base reaction: A chemical reaction between an acid and a base, resulting in the formation of water and a salt.