What do you mean by a precipitation reaction? Explain by giving examples.



A precipitate is an insoluble substance.

A reaction in which any insoluble solid precipitate is formed is called Precipitation Reaction


For example,

  1. When Sodium Sulphate solution is mixed with Barium Chloride solution It forms Barium Sulphate and Sodium Chloride solution.


In this reaction, a white precipitate of Barium Sulphate is formed


Na 2 SO 4 (aq) + BaCl 2 (aq) → BaSO 4 (s) + 2NaCl (aq)



  1. When Potassium Iodide solution is added to Lead Nitrate solution
    A yellow precipitate of Lead Iodide is formed along with Potassium Nitrate solution
    KI + Pb(NO 3 ) 2 →  KNO 3 + PbI 2

                                                                                                 (Yellow precipitate)

  1. Class 10
  2. Chapter 1 Class 10 - Chemical Reactions and Equations (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo