Why is the reaction between barium chloride and sodium sulphate classified as both a double-displacement and a precipitation reaction?
Answer and explanation
Correct answer: Because ions are exchanged and an insoluble 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 \(\mathrm{Na^+}\) ions exchange anionic partners, so it is a double-displacement reaction. The product \(\mathrm{BaSO_4}\) is an insoluble solid that separates as a precipitate, so it is also a precipitation reaction. Unlike option B, no oxidation or reduction occurs in this reaction.
Frequently asked questions
What is the correct answer to this question?
Because ions are exchanged and an insoluble 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 \(\mathrm{Na^+}\) ions exchange anionic partners, so it is a double-displacement reaction. The product \(\mathrm{BaSO_4}\) is an insoluble solid that separates as a precipitate, so it is also a precipitation reaction. Unlike option B, no oxidation or reduction occurs in this reaction.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
