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When sodium hydroxide is slowly added to an acidic solution, what is the main ionic change?

Answer and explanation

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

An acidic solution contains hydrogen ions, H⁺, while sodium hydroxide dissociates in water to provide hydroxide ions, OH⁻. The central ionic neutralisation reaction is H⁺ + OH⁻ → H₂O. Sodium ions and any accompanying anions generally remain as spectator ions and may form a dissolved salt. Therefore option A correctly states the main change; the other options involve chemically unsupported transformations.

Related tags

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

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