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A student says that pH zero means there is no acid. What is the correct evaluation?

Answer and explanation

Correct answer: The statement is wrong because very low pH shows very high acidity

The governing concept is the pH scale, which indicates hydrogen-ion concentration: pH = −log[H+]. Lower pH values correspond to greater hydrogen-ion concentration and stronger acidity. Therefore pH 0 represents a highly acidic solution, not the absence of acid, so option A is correct. Neutrality is approximately pH 7, while pH values above 7 generally indicate basic solutions; pH is used for both acids and bases.

Related tags

Ph ScaleHydrogen IonsAcidityAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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