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Why does an acidic solution not immediately become basic even after strong dilution with water?

Answer and explanation

Correct answer: Hydrogen ions decrease but do not completely disappear

The governing concept is dilution and hydrogen-ion concentration. Adding water increases the volume, so the concentration of hydrogen ions decreases and the pH rises toward 7. However, dilution alone does not automatically remove every hydrogen ion or create an excess of hydroxide ions. Therefore, while the acid becomes weaker, it remains acidic as long as hydrogen ions still determine the solution’s behaviour. Option B is false because water does not convert every acid into a base, and D is false because pH does change.

Related tags

DilutionAcidPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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