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Which of the following reactions is an example of both a double displacement reaction and a precipitation reaction?

Answer and explanation

Correct answer: Reaction between barium chloride solution and sodium sulphate solution

In aqueous solutions of barium chloride and sodium sulphate, ions exchange: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)\downarrow+2NaCl(aq)}\). Insoluble barium sulphate is formed as a solid precipitate. Hence, this is both a double displacement reaction and a precipitation reaction. In contrast, burning magnesium is a combination/oxidation reaction, not an exchange of ions.

Related tags

ScienceClass 10Chemical ReactionsDouble DisplacementPrecipitation ReactionsBarium Sulphate

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