Question

Statements given below are incorrect. Write the correct statements.

Copper reacts with zinc sulphate solution to displace zinc and form copper sulphate.

Answer 1

A displacement reaction is a type of chemical reaction in which a more reactive metal displaces a less reactive metal from its salt solution. Here, Zinc(Zn) is more reactive than copper(Cu) as it lies above copper in the reactivity series. Hence, will displace copper from the copper sulphate solution.

Example of displacement reaction: Displacement of Copper(Cu) by Zinc(Zn) in the chemical reaction shown below;

$$\begin{gathered} \mathrm{Zn}\left(\mathrm{s}\right)+{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)\to {\mathrm{ZnSO}}_4\left(\mathrm{aq}\right)+\mathrm{Cu}\left(\mathrm{s}\right) \\ \left(\mathrm{Zinc}\right)(\mathrm{Copper}\mathrm{sulphate})(\mathrm{Zinc}\mathrm{sulphate})\left(\mathrm{copper}\right) \end{gathered}$$

• Zinc is more reactive than Copper as it lies above Copper in the reactivity series.
• Therefore, it displaces Copper from its salt solution i.e. Copper sulphate to form Zinc sulphate and Copper

Correct statement: Zinc reacts with copper sulphate solution to displace copper and form zinc sulphate.