\(CuSO_4\underrightarrow{1}CuCl_2\underrightarrow{2}Cu\left(OH\right)_2\underrightarrow{3}CuO\underrightarrow{4}\\ \left(1\right)CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\\ \left(2\right)CuCl_2+2NaOH\rightarrow2NaCl+Cu\left(OH\right)_2\\ \left(3\right)Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\\ \left(4\right)CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
\(\text{BaCl2 + CuSO4 → CuCl2 + BaSO4}\)
\(\text{2NaOH + CuCl2 → Cu(OH)2 + 2NaCl}\)
\(\text{Cu(OH)2 → CuO + H2O}\)
\(\text{2CuO → 2Cu + O2}\)
CuSO4+ BaCl2----> CuCl2+BaSO4
CuCl2+2NaOH--->Cu(OH)2+ 2NaCl
Cu(OH)2--->CuO+H2O
CuO+H2--->Cu+H2O
