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What happens to the pH value when the concentration of hydrogen ions increases in an acidic solution?

Answer and explanation

Correct answer: pH decreases

The governing relationship is pH = −log[H⁺]. Because the logarithm is preceded by a minus sign, increasing the hydrogen-ion concentration makes the pH value decrease. Therefore option B is correct. A lower pH indicates a more acidic solution. The value does not automatically become 7, since pH 7 represents neutrality at standard conditions, and it cannot remain unchanged when [H⁺] changes.

Related tags

PhHydrogen-Ion-ConcentrationAcidityClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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