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If hydroxide ions are slowly added to an acidic solution, why will its pH increase?

Answer and explanation

Correct answer: Hydroxide ions combine with hydrogen ions to form water

An acidic solution contains a relatively high concentration of hydrogen or hydronium ions. Added hydroxide ions react with them in the neutralisation process: H⁺ + OH⁻ → H₂O. As H⁺ concentration falls, the negative logarithm used to define pH increases, so the solution becomes less acidic and its pH rises. The other options describe no valid consequence of adding hydroxide ions.

Related tags

NeutralisationHydroxide IonsPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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