and in lab jargon, "HCl" often means hydrochloric acid, not the gaseous hydrogen chloride.

Occurrence and production

Hydrogen fluoride, chloride, and bromide are volcanic gases.

The hydrogen halides can be produced by many routes industrially and in the laboratory. Focusing on the most abundant compound, hydrogen chloride is mainly produced as a side product in production of chlorocarbons. Hydrogen fluoride is a byproduct of the production of phosphoric acid.

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