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Which insoluble substance forms as a precipitate when an aqueous solution of barium chloride is mixed with an aqueous solution of sodium sulphate?

Answer and explanation

Correct answer: Barium sulphate

This is a double displacement reaction: \(\mathrm{BaCl_2(aq) + Na_2SO_4(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)}\). The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions combine to form insoluble barium sulphate, a white precipitate. Sodium chloride remains dissolved in water, so it does not form the precipitate.

Related tags

ScienceClass-10Chemical-ReactionsPrecipitationDouble-DisplacementBarium-Sulphate

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