\(\left(1\right)\) \(2Fe+3Cl_2\underrightarrow{t^0}2FeCl_3\)
\(\left(2\right)\) \(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_3\)
\(\left(3\right)\) \(2Fe\left(OH\right)_3\underrightarrow{t^0}Fe_2O_3+3H_2O\)
\(\left(4\right)\) \(Fe_2O_3+3CO\rightarrow2Fe+3CO_2\)