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A student is diluting concentrated sulphuric acid. Which method reduces the risk of splashing caused by the heat produced?

Answer and explanation

Correct answer: Add acid to water in small portions while stirring continuously

Dissolving concentrated sulphuric acid in water is exothermic. Adding the acid slowly to a larger volume of water while stirring lets the heat disperse, reducing sudden boiling and splashing. In contrast, adding water to acid can rapidly heat the small layer of water and cause it to splash.

Related tags

Acids Bases SaltsAcid DilutionLaboratory SafetySulphuric AcidExothermic Reaction

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