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

Answer and explanation

Correct answer: Solution with pH 12

The governing concept is the pH scale: at 25°C, pH = 7 is neutral, values below 7 are acidic, and values above 7 are basic. A higher pH corresponds to a lower hydrogen-ion concentration and, in a basic solution, a higher hydroxide-ion concentration. Therefore, among pH 12, 7, 5, and 2, the pH 12 solution has the greatest hydroxide concentration. pH 7 is neutral, while pH 5 and pH 2 are acidic.

Related tags

PhBasesHydroxide IonsAcidsAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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