Milk of magnesia is a sparingly soluble suspension of magnesium hydroxide in water. it acts as an antacid by neutralizing hydrochloric acid (hcl) in the stomach. which is the best explanation of how milk of magnesia neutralizes the conjugate acid produced by hcl and h2o in the stomach

The milk of magnesia is a suspension of magnesium hydroxide in water, which is a strong base that is used to neutralize excess stomach acid. The presence of stomach acid or hydrochloric acid (HCl) that is known to be a strong acid will react with the strong base and neutralization reaction occurs since conjugate partners produced negligible strength where the products are a salt and water.