A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...

Three sanitation workers were taken to a hospital after a container of muriatic acid burst while they were collecting and ...

Method: Dip a glass rod in concentrated hydrochloric acid and put this in a sample of the gas. Result: If ammonia is present, a white ‘smoke’ of ammonium chloride is observed.

Use a weak acid such as acetic acid and a weak base such as ammonia and after a few times the demonstration ... Universal indicator is flammable and slightly toxic if ingested. Hydrochloric acid is ...