Question

Name the chemical reaction. $\mathrm{Fe}+{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)\to {\mathrm{FeSO}}_4\left(\mathrm{aq}\right)+\mathrm{Cu}\left(\mathrm{s}\right)$

Answer 1

Displacement reaction

1. A reaction in which the atom or a set of atoms is displaced by another atom in a molecule is called displacement reaction.
2. A single displacement reaction occurs when one element in a compound is replaced by another.
3. In displacement reaction a metal only substitutes for metal, and a non-metal only substitutes for a non-metal.
4. More reactive elements displaces less reactive element.
5. Representation of displacement reaction

$\mathrm{A}+\mathrm{B}-\mathrm{C}\to \mathrm{A}-\mathrm{C}+\mathrm{B}$

The above equation exists when A is more reactive than B.

A and B can be either:

• Halogens where C indicates a cation.
• Different metals wherein C indicates an anion.

From chemical reaction given below,

$\underset{\mathrm{Iron}}{\mathrm{Fe}\left(\mathrm{s}\right)}+\underset{\mathrm{Copper}\mathrm{sulphate}}{{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Iron}\mathrm{sulphate}}{{\mathrm{FeSO}}_4\left(\mathrm{aq}\right)}+\underset{\mathrm{Copper}}{\mathrm{Cu}\left(\mathrm{s}\right)}$

From the given reaction , we can say that, when the iron is added to a copper sulphate solution, it displaces the copper metal to form ferrous sulphate. Thus, it is a Displacement reaction.