Question

Is HCl is a pure substance? It is a mixture in water, but its chemical formula is HCl, which shows it is not a mixture. So is hydrogen chloride gas a compound, or hydrochloric acid?

Answer 1

HCL is not a pure substance it is an acid. HCL is said to be hydrochloric acid when water is added to it as it is incomplete without water. the right answer is that hydrochloric acid is not a compound it is an acid which is full proper when we add H2O in it.
Hope it helps.....

Answer 2

hydrochloric is acid and HCl is a pure substance as it has a chemical formula which can not be changed.