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When a small amount of acid is mixed with water, the amount of which ion increases in the solution?

Answer and explanation

Correct answer: Hydrogen ion

The governing concept is the ionisation of acids in water. An acid produces hydrogen ions in aqueous solution; more precisely, these hydrogen ions associate with water to form hydronium ions, H₃O⁺. Therefore the concentration of the acidic hydrogen-ion species increases, making option B correct. Hydroxide ions are associated with basicity, carbonate ions are not produced by every acid, and chloride ions occur only with particular acids such as hydrochloric acid.

Related tags

AcidsHydrogen-IonsHydroniumAqueous-SolutionPhBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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