Dear Student, Dilute hydrochloric acid is the acid produced in our stomach. Sometimes, excess acid is produced in the stomach for various reasons such as overeating. When this happens, the excess generation of acid in the stomach causes indigestion with pain and discomfort. This can be cured by the intake of antacids, which are weak bases. They neutralise the excess acid produced in the stomach, providing relief from indigestion and relieving the pain. Antacid is Magnesium Hydroxide, Mg(OH)2.