\(\left(1\right)2Fe+3Cl_2\rightarrow2FeCl_3\)
\(\left(2\right)FeCl3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(\left(3\right)2Fe\left(OH\right)_3-^{t^o}\rightarrow Fe2O3+3H_2O\)
\(\left(4\right)Fe_2O_3+3H_2-^{t^o}\rightarrow2Fe+3H_2O\)
1) 2Fe + 3Cl2 -> 2FeCl3
2) FeCl3 + 3NaOH -> 3NaCl + Fe(OH)3
3) 2Fe(OH)3 -to-> Fe2O3 + 3H2O
4) Fe2O3 + 3CO -to->2 Fe + 3CO2
2Fe+ 3Cl2\(\xrightarrow[]{to}\) 2FeCl3
FeCl3+ 3NaOH\(\rightarrow\) Fe(OH)3\(\downarrow\)+ 3NaCl
2Fe(OH)3\(\xrightarrow[]{to}\) Fe2O3+ 3H2O
Fe2O3+ 3CO\(\xrightarrow[]{to}\) 2Fe+ 3CO2