When two aqueous solutions are mixed, white insoluble barium sulphate and sodium chloride are formed. Which pair of original solutions could have been used?
Answer and explanation
Correct answer: Barium chloride and sodium sulphate
Barium chloride and sodium sulphate undergo a double-displacement reaction in aqueous solution:
\(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)}\).
Barium sulphate is the white insoluble precipitate, while sodium chloride remains in solution. In option C, sodium chloride is formed, but the precipitate is barium carbonate rather than barium sulphate.
Frequently asked questions
What is the correct answer to this question?
Barium chloride and sodium sulphate
Why is this the correct answer?
Barium chloride and sodium sulphate undergo a double-displacement reaction in aqueous solution:
\(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)}\).
Barium sulphate is the white insoluble precipitate, while sodium chloride remains in solution. In option C, sodium chloride is formed, but the precipitate is barium carbonate rather than barium sulphate.
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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