Name: Preparation of Insoluble Salts
Uploaded: 2019-07-19
Duration: 2 min 50 s
Description: A precipitation reaction is an example of a "Double Displacement Reaction" and is one of the ways to produce insoluble salts. Let us learn about it.

Question

Giving suitable examples differentiate between single displacement and double displacement reactions.

Accepted Answer

Displacement reaction Double displacement reaction

In displacement reaction, atom or group of atoms present in a molecule is displaced by another atom. In double displacement reaction, two compounds exchange their ions to form two new compounds.

Displacement reaction Double displacement reaction

For example, when a piece of iron is added to a solution of copper sulphate, iron displaces copper from copper sulphate solution and forms iron sulphate and copper.

$\underset{Iron}{Fe (s)} + \underset{Copper sulphate}{{CuSO}_{4} (aq)} \to \underset{Iron sulphate}{{FeSO}_{4} (aq)} + \underset{Copper}{Cu (s)}$

For example, when a solution of silver nitrate is added to a solution of sodium chloride, a white precipitate of silver chloride is formed along with sodium nitrate.

$\underset{Sodium chloride}{NaCl (aq)} + \underset{Silver nitrate}{{AgNO}_{3} (aq)} \to \underset{Silver chloride}{AgCl (s)} + \underset{Sodium nitrate}{{NaNO}_{3} (aq)}$

Giving suitable examples differentiate between single displacement and double displacement reactions.

Important Questions on Chemical Reactions

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