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.
Frequently asked questions
What is the correct answer to this question?
Barium sulphate and sodium chloride
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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