Medically reviewed by Alex Yampolsky, PharmD Magnesium hydroxide, the main ingredient in the popular over-the-counter (OTC) ...

Your stomach contains hydrochloric acid, and too much of this causes indigestion. Antacid tablets contain bases such as magnesium hydroxide and magnesium carbonate to neutralise the extra acid.

Repeat step 2 with hydrochloric acid, place both boiling tubes in the boiling tube rack Add the magnesium strip to each boiling tube – ensuring that the Mg is fully immersed in the acid ...