1)
CuSO4 + 2NaOH => Cu(OH)2 + Na2SO4
Cu(OH)2 => CuO + H2O
2CuO => 2Cu + O2
2)
ZnCl2 +2NaOH => Zn(OH)2 + 2NaCl
Zn(OH)2 + 2HCl => ZnCl2 + 2H2O
1)
CuSO4 + 2NaOH => Cu(OH)2 + Na2SO4
Cu(OH)2 => CuO + H2O
2CuO => 2Cu + O2
2)
ZnCl2 +2NaOH => Zn(OH)2 + 2NaCl
Zn(OH)2 + 2HCl => ZnCl2 + 2H2O