CuSO4 + 2 NaOH -> Cu(OH)2 + Na2SO4
Cu(OH)2 -> CuO + H2O
CuO + H2 -> Cu + H2O
ZnCl2 + 2 NaOH -> Zn(OH)2 + 2 NaCl
Zn(OH)2 -> ZnO + H2O
ZnO + H2 -> Zn + H2O
CuSO4 + 2 NaOH -> Cu(OH)2 + Na2SO4
Cu(OH)2 -> CuO + H2O
CuO + H2 -> Cu + H2O
ZnCl2 + 2 NaOH -> Zn(OH)2 + 2 NaCl
Zn(OH)2 -> ZnO + H2O
ZnO + H2 -> Zn + H2O