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A student dilutes concentrated sulphuric acid by adding water to a beaker containing acid. What correction should be made to prevent an accident?

Answer and explanation

Correct answer: Add acid slowly to water while stirring

Diluting concentrated sulphuric acid is highly exothermic. The safe method is to place water in the vessel and add the acid slowly in small portions while continuously stirring, so the released heat is distributed through the larger water volume. Thus option B is correct. Adding water directly to concentrated acid can make the small water layer boil suddenly and eject hot corrosive acid.

Related tags

Acid DilutionLaboratory SafetySulphuric AcidExothermic ReactionAcids Bases SaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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