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Equal volumes of acid and base are mixed, yet the solution remains basic. What is the most suitable reason?

Answer and explanation

Correct answer: The base was more concentrated or stronger

The governing idea is that neutralisation compares reacting amounts, not just liquid volumes. Equal volumes of an acid and a base may contain unequal concentrations of ions. A more concentrated or stronger base can provide more hydroxide ions than the acid can neutralise. After the reaction, excess hydroxide ions remain, so the mixture has a pH above 7 and is basic. Option C is wrong because equal volume has no fixed pH, while D is wrong because acid-base neutralisation commonly forms water along with salt.

Related tags

NeutralisationBase StrengthPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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