Write a chemical equation showing that Aluminium has more affinity than Iron for Oxygen.

The chemical reaction that shows Aluminium has more affinity than Iron for Oxygen is the thermite reaction.

The chemical equation for the thermite reaction is,

$$\begin{gathered} 2\mathrm{Al}\left(\mathrm{s}\right)+{\mathrm{Fe}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)\to {\mathrm{Al}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)+2\mathrm{Fe}\left(\mathrm{s}\right) \\ \mathrm{Aluminium}\mathrm{Ferric}\mathrm{Aluminium}\mathrm{Iron} \\ \mathrm{oxide}\mathrm{oxide} \end{gathered}$$

• Because of the higher affinity of the Aluminium for Oxygen, it is used as a reducing agent in the thermite reaction.