\(\left(1\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+NaCl\)
\(\left(2\right)Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\)
\(\left(3\right)CuSO_4+2NaCl\rightarrow Na_2SO_4+CuCl_2\)
\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\\ Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\\ CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\)