Why does a precipitate form when aqueous barium chloride reacts with aqueous sodium sulphate?
Answer and explanation
Correct answer: Barium sulphate is insoluble in water.
The reaction is:
\[\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)\downarrow+2NaCl(aq)}\]
In solution, \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions combine to form insoluble \(\mathrm{BaSO_4}\), which separates as a solid precipitate. In contrast, \(\mathrm{NaCl}\) remains soluble in water.
Frequently asked questions
What is the correct answer to this question?
Barium sulphate is insoluble in water.
Why is this the correct answer?
The reaction is:
\[\mathrm{BaCl_2(aq)+Na_2SO_4(aq)\rightarrow BaSO_4(s)\downarrow+2NaCl(aq)}\]
In solution, \(\mathrm{Ba^{2+}}\) and \(\mathrm{SO_4^{2-}}\) ions combine to form insoluble \(\mathrm{BaSO_4}\), which separates as a solid precipitate. In contrast, \(\mathrm{NaCl}\) remains soluble in water.
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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