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Why can sodium hydrogen carbonate be considered a useful antacid in excess acidity?

Answer and explanation

Correct answer: It can neutralise excess acid

Sodium hydrogen carbonate, NaHCO₃, is a mild base. In excess stomach acidity, it reacts with hydrochloric acid and reduces the concentration of excess acid: NaHCO₃ + HCl → NaCl + H₂O + CO₂. Therefore, option A is correct because neutralisation can provide relief. Option B is opposite to its action, while C and D do not describe an acid–base reaction.

Related tags

AntacidNeutralisationBaking SodaAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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