Put a stoppered beaker of hydrochloric acid next to a stoppered beaker of ammonia. Nothing happens. Yank out the stoppers, and suddenly, the beaker of acid will start giving off plumes of white smoke.

Hydrochloric acid is a chemical most commonly used in cleaning products. According to the National Library of Medicine, hydrochloric acid is a colorless watery liquid with a sharp, irritating odor.

Hydrochloric acid supplements and enzymes. Your doctor may prescribe supplements such as betaine hydrochloride to restore the pH of your stomach. The stomach enzyme pepsin is another common treatment.

Witness the dramatic reaction as a soda can meets hydrochloric acid in this intense science experiment. Watch the magic unfold as we explore chemical reactions up close!

The claim: A 'massive death plume' is raining down hydrochloric acid after Ohio train derailment. A Feb. 13 Facebook post (direct link, archived link) shows a screenshot of a tweet about the Feb ...