Q&A/Class 10/Chemistry

What do you understand by precipitation reaction? Explain with suitable examples.

Class 10CBSEChemistryChapter: Chemical Reactions and Equations
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The reaction in which two compounds in their aqueous state react to form an insoluble compound. When two reactants react and product formed remains insoluble and settles as a solid it is substance (precipitate) is called a precipitation reaction.

For example,

  • When aqueous solution of sodium sulphate is mixed with an aqueous solution or barium chloride, barium sulphate is obtained as a white precipitate. Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq)
  • When aqueous solution of sodium chloride is mixed with an aqueous solution of silver nitrate, silver chloride is obtained as a white precipitate. NaCl(aq) + AgNO₃(aq) → AgCl(s) ↓ (White precipitate) + NaNO₃(aq)

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