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Which products are formed when barium chloride and sodium sulphate solutions are mixed?

Answer and explanation

Correct answer: Barium sulphate and sodium chloride

This is a double-displacement precipitation reaction. The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions combine to form insoluble barium sulphate as a white precipitate: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)}\). Hence, the products are barium sulphate and sodium chloride. Option B contains sulphite rather than sulphate, and sulphite ions are not present in the reactants. Exam tip: In such questions, identify the insoluble salt to find the precipitate product.

Related tags

ScienceClass 10Chemical ReactionsDouble Displacement ReactionPrecipitation ReactionBarium Sulphate

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