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Water is added to an acidic solution but it remains acidic. What is the correct reason?

Answer and explanation

Correct answer: Hydrogen ions decreased but did not completely disappear

Adding water causes dilution: the concentration of hydrogen ions per unit volume decreases, so the pH usually moves upward toward 7. However, dilution does not remove every hydrogen ion or automatically create a basic solution. If hydrogen-ion concentration is still greater than hydroxide-ion concentration, the solution remains acidic. Therefore option A correctly explains the observation; the other choices contradict dilution and acid-base behaviour.

Related tags

DilutionAcidic SolutionPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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