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Which method is safest for diluting concentrated sulphuric acid in a laboratory?

Answer and explanation

Correct answer: Add acid slowly to water while stirring continuously

The governing concept is safe handling of an exothermic dilution. Concentrated sulphuric acid releases a large amount of heat when mixed with water. The safe method is to add the acid slowly to a larger volume of water while stirring continuously, allowing heat to disperse and reducing the chance of local boiling and splashing. Adding water directly to concentrated acid can make the small water layer boil suddenly. Therefore, option A is correct.

Related tags

Acid DilutionLaboratory SafetySulphuric AcidExothermic ReactionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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