Question

$\mathrm{Pb}\left(\mathrm{S}\right)+{\mathrm{CuSO}}_4\left(\mathrm{Aq}\right)\to {\mathrm{PbSO}}_4\left(\mathrm{Aq}\right)+\mathrm{Cu}\left(\mathrm{S}\right)$. The reaction is an example of ______ reaction.

Answer 1

Displacement reaction:

• A displacement reaction is known as the reaction where the atom or a set of atoms gets displaced by another atom in a molecule.
• The one which is more strong and reactive usually displaces the one that is weaker or less reactive from its salt solution.
• However, when reactions take place mostly in aqueous solutions wherein the ions precipitate and exchange of ions takes place, it is known as a double displacement reaction.

The given reaction categorization:

• Here the reaction is given as :

$\underset{\left(\mathrm{Lead}\right)}{\mathrm{Pb}\left(\mathrm{s}\right)}+\underset{\left(\mathrm{Copper}\mathrm{sulphate}\right)}{{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Lead}\left(\mathrm{II}\right)\mathrm{sulfate}\right)}{{\mathrm{PbSO}}_4\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Copper}\right)}{\mathrm{Cu}\left(\mathrm{s}\right)}$

• The reaction of Copper sulfate solution with lead can be classified as a displacement reaction.
• Here the Lead as a more reactive element displaces the Copper which is comparatively less reactive and results in forming the insoluble precipitate out of the solution.

Hence, The reaction is an example of a displacement reaction.