What is the correct set of products 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: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)}\). The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions form insoluble white barium sulphate, while sodium chloride remains in solution. Option B is wrong because it incorrectly replaces the sulphate ion with a sulphite ion. Exam tip: After exchanging ions in a double-displacement reaction, check the solubility of the products.
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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: \(\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)+2NaCl(aq)}\). The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions form insoluble white barium sulphate, while sodium chloride remains in solution. Option B is wrong because it incorrectly replaces the sulphate ion with a sulphite ion. Exam tip: After exchanging ions in a double-displacement reaction, check the solubility of the products.
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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