Hydrochloric acid

From Conservapedia

Hydrochlorid acid is the solution of hydrogen chloride (HCl) in water. As it essentially completely dissociates, hydrochloric acid is a strong acid.

It was discovered in the 800 A.D. by Geber when he mixed sodium chloride - the common salt - and vitriol, i.e., sulphuric acid (another discovery of Geber).