Fe+Br2→Fe2++2Br−\mathrm{Fe}+\mathrm{Br}_{2} \rightarrow \mathrm{Fe}^{2+}+2 \mathrm{Br}^{-}Fe+Br2→Fe2++2Br−
Fe+2Br−→Fe2++Br2\mathrm{Fe}+2 \mathrm{Br}^{-} \rightarrow \mathrm{Fe}^{2+}+\mathrm{Br}_{2}Fe+2Br−→Fe2++Br2
Fe2++Br2→Fe+2Br−\mathrm{Fe}^{2+}+\mathrm{Br}_{2} \rightarrow \mathrm{Fe}+2 \mathrm{Br}^{-}Fe2++Br2→Fe+2Br−
Fe+Br2→Fe3++2Br−\mathrm{Fe}+\mathrm{Br}_{2} \rightarrow \mathrm{Fe}^{3+}+2 \mathrm{Br}^{-}Fe+Br2→Fe3++2Br−