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Which solution is most likely to have the highest concentration of hydrogen ions?

Answer and explanation

Correct answer: Solution with pH two

The pH scale is defined by hydrogen-ion concentration: pH = −log[H⁺]. Thus a decrease of one pH unit represents a tenfold increase in hydrogen-ion concentration. Among pH 2, 7, 10, and 12, pH 2 is the lowest and therefore has the greatest [H⁺]. The pH 7 solution is neutral, while pH 10 and pH 12 are alkaline and have lower hydrogen-ion concentrations. Hence option A is correct.

Related tags

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

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