Question

What is a metal displacement reaction? Give one example.

Answer 1

Part:1

• Metal displacement: A reaction where a highly electropositive metal replaces the metal of lower reactivity from its salt to form a new salt is called Metal displacement.
• A reaction like this can be expressed as. $\mathbf{AX}\mathbf{}\mathbf{+}\mathbf{}\mathbf{M}\mathbf{}\mathbf{⟶}\mathbf{}\mathbf{MX}\mathbf{}\mathbf{+}\mathbf{}\mathbf{A}$

Part:2

• A displacement reaction happens when a particle of Magnesium is dipped into a blue Copper Sulphate solution. The Magnesium displaces the Copper, resulting in Copper and a Magnesium Sulphate solution.

$$\begin{gathered} \mathbf{Mg}\mathbf{}\mathbf{\left(}\mathbf{s}\mathbf{\right)}\mathbf{}\mathbf{+}\mathbf{}{\mathbf{CuSO}}_{\mathbf{4}\mathbf{}}\mathbf{\left(}\mathbf{aq}\mathbf{\right)}\mathbf{}\mathbf{\to }\mathbf{}{\mathbf{MgSO}}_{\mathbf{4}}\mathbf{}\mathbf{\left(}\mathbf{aq}\mathbf{\right)}\mathbf{}\mathbf{+}\mathbf{}\mathbf{Cu}\mathbf{}\mathbf{\left(}\mathbf{s}\mathbf{\right)} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathit{C}\mathit{o}\mathit{p}\mathit{p}\mathit{e}\mathit{r}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathit{M}\mathit{a}\mathit{g}\mathit{n}\mathit{e}\mathit{s}\mathit{i}\mathit{u}\mathit{m}\mathbf{} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathit{S}\mathit{u}\mathit{l}\mathit{p}\mathit{h}\mathit{a}\mathit{t}\mathit{e}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathbf{}\mathit{S}\mathit{u}\mathit{l}\mathit{p}\mathit{h}\mathit{a}\mathit{t}\mathit{e} \end{gathered}$$