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Two aqueous solutions are mixed and a white insoluble solid and sodium chloride are formed. What could be the original solutions?

Answer and explanation

Correct answer: Barium chloride and sodium sulphate

Barium chloride and sodium sulphate undergo a double-displacement reaction: BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2NaCl(aq). Barium sulphate is a white insoluble precipitate, while sodium chloride remains dissolved. The other choices do not provide the required pair of products or do not represent two suitable aqueous salt solutions.

Related tags

ScienceClass 10Double DisplacementPrecipitationChemical ReactionsSodium ChlorideChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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