\(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)
\(2Al_2O_3\underrightarrow{npnc}4Al+3O_2\)
\(2Al+3FeCl_2\rightarrow2AlCl_3+3Fe\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2\downarrow+2NaCl\)
\(Fe\left(OH\right)_2\underrightarrow{t^o}FeO+H_2O\)