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If water is suddenly added to concentrated acid, what is the main danger?

Answer and explanation

Correct answer: Sudden heat can splash acid

The governing concept is that dilution of a concentrated acid is highly exothermic, meaning it releases considerable heat. If a small amount of water is poured suddenly into acid, the water may heat and boil locally, causing the acid to splash violently. Therefore option A is correct. The solution does not freeze, acid cannot change into sugar, and option D is wrong because heat is released. For safety, acid should be added slowly to water with stirring.

Related tags

Acid DilutionLaboratory SafetyExothermic ReactionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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