CuSO4 -> CuOCuSO4 + 2H2O -> CuO + H2SO4
CuO -> CuCl2CuO + 2HCl -> CuCl2 + H2O
CuCl2 -> Cu(OH)2CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl
CuSO4 -> CuO
CuSO4 + 2H2O -> CuO + H2SO4
CuO -> CuCl2
CuO + 2HCl -> CuCl2 + H2O
CuCl2 -> Cu(OH)2
CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl