What visible change occurs when an aqueous solution of sodium sulphate is mixed with an aqueous solution of barium chloride?
Answer and explanation
Correct answer: A white precipitate of barium sulphate forms.
The reaction is \(\mathrm{BaCl_2(aq) + Na_2SO_4(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)}\). The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions form insoluble white \(\mathrm{BaSO_4}\), producing a visible precipitate. In contrast, sodium chloride remains dissolved in water and does not form a precipitate.
Frequently asked questions
What is the correct answer to this question?
A white precipitate of barium sulphate forms.
Why is this the correct answer?
The reaction is \(\mathrm{BaCl_2(aq) + Na_2SO_4(aq) \rightarrow BaSO_4(s) + 2NaCl(aq)}\). The \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions form insoluble white \(\mathrm{BaSO_4}\), producing a visible precipitate. In contrast, sodium chloride remains dissolved in water and does not form a precipitate.
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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