What is the difference between displacement and double displacement reactions? Write equations for these reactions.

 

Answer

 

DISPLACEMENT REACTION

DOUBLE DISPLACEMENT REACTION

A more reactive element takes the place of a less reactive element in a chemical compound

Two compounds react and their positive and negative ions switch places to form 2 new products

Only one species is displaced and replaced from a compound

Displacement and replacement of 2 species takes place

   

Occurs in accordance with the reactivity series

Occurs wherever ions can be exchanged in compounds

Example:

Fe(s) + CuSO 4 (aq) → FeSO 4 (aq) + Cu(s)


Iron displaces Copper from Copper Sulphate solution as Iron is more reactive than Copper and Copper gets deposited on the Iron nail

Example:

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


Na + combines with Cl - , forming  NaCl

Ba 2+ combines with (SO 4 ) 2- forming BaSO 4

BaSO 4 precipitate is formed

  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