NCERT Question 15 - Chapter 1 Class 10 - Chemical Reactions and Equations

Last updated at Dec. 16, 2024 by

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

 

Answer

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)

Formation of Barium Sulphate-Teachoo-01.jpg

 

  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)

 

DOUBLE DISPLACEMENT REACTION TAKES PLACE BETWEEN LEAD NITRATE AND POTASSIUM IODIDE TO FORM POTASSIUM NITRATE AND YELLOW PRECIPITATE OF LEAD IODIDE - Teachoo.jpg

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