\(FeCl_2\rightarrow Fe\left(OH\right)_2\rightarrow FeO\rightarrow Fe\rightarrow Cu\\ CuSO_4\rightarrow CuCl_2\rightarrow Cu\left(OH\right)_2\rightarrow CuO\rightarrow Cu\\ CácPTHH:\\ Chuỗi.1:\\ \left(1\right)FeCl_2+2KOH\rightarrow Fe\left(OH\right)_2+2KCl\\ \left(2\right)Fe\left(OH\right)_2\underrightarrow{^{to}}FeO+H_2O\\ \left(3\right)FeO+CO\underrightarrow{^{to}}Fe+CO_2\\ \left(4\right)Fe+CuSO_4\rightarrow FeSO_4+Cu\\ Chuỗi.2:\\ \left(1\right)CuSO_4+BaCl_2\rightarrow BaSO_4+CuCl_2\\ \left(2\right)CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2+2KCl\)
\(\left(3\right)Cu\left(OH\right)_2\underrightarrow{^{to}}CuO+H_2O\\ \left(4\right)CuO+CO\underrightarrow{^{to}}Cu+H_2O\)
