Is hydrogen chloride the gaseous form of hydrochloric acid?
Sort of. Hydrochloric acid forms when Hydrogen Chloride is disolved in water. So Hydrogen Chloride is a gas under normal temperature and pressure, but can also exist in liquid form when extremely cold (or solid if even colder) or under a lot of pressure. Hydrochloric acid only exists as a mixture of Hydrogen Chloride and Water and can be a solid, liquid, or gas as well.
