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If sodium hydroxide is slowly added to an acidic solution, what main ionic change occurs during neutralisation?

Answer and explanation

Correct answer: Hydrogen ions and hydroxide ions combine to form water

Neutralisation is governed by the net ionic equation H⁺(aq) + OH⁻(aq) → H₂O(l). An acidic solution contains hydrogen or hydronium ions, and sodium hydroxide dissociates to supply OH⁻ ions. These ions combine to form water; Na⁺ and the acid’s negative ion remain as dissolved salt ions. Therefore A is correct. The other choices describe no valid ionic process in this neutralisation.

Related tags

NeutralisationIonsSodium HydroxideAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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