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The pH of an acidic solution changes from 3 to 6. Which conclusion is correct?

Answer and explanation

Correct answer: Acidity decreased, but the solution is still acidic

The pH scale measures acidity through hydrogen-ion concentration: pH = −log[H⁺]. When pH rises from 3 to 6, the hydrogen-ion concentration decreases greatly, so the solution becomes less acidic. However, pH 6 is still below the neutral value of 7; it therefore remains acidic rather than becoming basic. Option B reverses the pH relationship, option C ignores the value 7, and option D is chemically impossible for an aqueous solution.

Related tags

PhAcidityHydrogen IonsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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