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A student added water to concentrated acid instead of adding concentrated acid to water. Why is this dangerous?

Answer and explanation

Correct answer: Excess heat may cause splashing

Dilution of a concentrated acid with water is an exothermic process, so heat is released. If a small quantity of water is poured into concentrated acid, the water may heat suddenly, boil, and produce acidic splashes. These splashes can cause severe burns. Therefore, the safe laboratory rule is to add concentrated acid slowly to a larger volume of water while stirring. Option A correctly describes the danger; the other choices contradict the heat-producing process.

Related tags

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

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