Question

Solve this :

2. What is meant by reactivity series of metals? State which of the following chemical reactions will take place giving suitable reason for each.

$$\begin{gathered} Zn\left(s\right)+CuS{O}_4\left(aq\right)\to ZnS{O}_4\left(aq\right)+Cu\left(s\right) \\ Fe\left(s\right)+ZnS{O}_4\left(aq\right)\to FeS{O}_4\left(aq\right)+Zn\left(s\right) \\ Zn\left(s\right)+FeS{O}_4\left(aq\right)\to ZnS{O}_4\left(aq\right)+Fe\left(s\right) \end{gathered}$$

Answer 1

1. According to the reactivity series, the reactivity is as follows:

Zn > Fe > Cu.

2. So, Reactions 1 and 3 are taking place. This happens because Zn is more reactive than Fe and Cu, it replaced both of them from their salt solution.

3. Reaction 2 will not take place as it shows Fe replacing Zn from its salt solution but Fe cannot do so as it is less reactive than Zn.