Antacid are prescribed during acidity. Commercially available antacids consist of magnesium hydroxide [Mg(OH)2], sugar and flavouring agents. The magnesium hydroxide act as base and form salt and water on reaction with hydrochloric acid of the stomach. The mass of salt and water formed is equal to the combined mass of
Acoording to the law of conservation of mass, the mass of products formed are equal to the mass of reactants consumed. Hence, the mass of salt and water formed is equal to the combined mass of magnesium hydroxide Mg (OH)2 and HCl.