\((1)2Fe + 3C{l_2}\buildrel {{t^o}} \over\longrightarrow 2FeC{l_3}\)
\((2)FeC{l_3} + 3NaOH \to Fe{(OH)_3} \downarrow + 3NaCl\)
\((3)2Fe{(OH)_3}\buildrel {{t^o}} \over\longrightarrow F{e_2}{O_3} + 3{H_2}O\)
\((4)F{e_2}{O_3} + 3{H_2}S{O_4} \to F{e_2}{(S{O_4})_3} + 3{H_2}O\)
\((5)Fe + 2HCl \to FeC{l_2} + {H_2} \uparrow \)
\((6)FeC{l_2} + 2NaOH \to Fe{(OH)_2} \downarrow + 2NaCl\)
\((7)Fe{(OH)_2} + {H_2}S{O_4} \to FeS{O_4} + 2{H_2}O\)
\((8)FeS{O_4} + Zn \to ZnS{O_4} + Fe \downarrow \)
