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A student says that an antacid medicine used to reduce stomach acidity should be acidic. What is the correct correction to this statement?

Answer and explanation

Correct answer: An antacid is basic and neutralises HCl in the stomach.

Excess HCl in the stomach can cause acidity and irritation. An antacid contains a mild base that neutralises HCl to form salt and water: \(\text{acid} + \text{base} \rightarrow \text{salt} + \text{water}\). Therefore, an antacid is not acidic; an acidic substance could increase rather than reduce the acidity caused by HCl.

Related tags

Acids Bases SaltsAntacidsNeutralisation ReactionStomach AcidClass 10 Science

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