What is made when Aluminium and Hydrochloric Acid reacts? It makes a dense white smoke with a metallic odour in the gas. Could it be dissolved amounts of Aluminium Chloride or small amounts of unreacted Aluminium in the gas? Or could be that the Chlorine (in equilibrium with HCl and HClO) made chlorates and perchlorates of aluminium that give off odours?Don\'t tell me the gas isn\'t supposed to have an odour. I know what diatomic Hydrogen smells like. Nothing. That\'s the way it should be. But unfortunately, that\'s not the way it is.When aluminum reacts with hydrochloric acid heat is produced as well as aluminum chloride. This heat is warming up the HCl, which you should remember is a gas dissolved in water, a little of which evolves from the water. You\'re smelling HCl gas. There shouldn\'t be any dense white smoke, unless you\'ve got an open container of ammonia nearby. In that case the smoke is particulate ammonium chloride, produced by the reaction in the air of HCl and NH3.i might call the plumber immediately. curiously there\'s a hollow interior the piping someplace, and the sulfuric acid would desire to have eaten by in spite of advance into clogging that hollow. I doubt that it will supply up leaking via itself, to no longer point out that acid is in all risk leaking into your kitchen in the present day.Other related question