a)Zn + H2SO4 -> ZnSO4 + H2
ZnSO4 + 2NaOH -> Zn(OH)2 + Na2SO4
б) CuO + H2SO4 -> CuSO4 + H2O
CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4
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a)Zn + H2SO4 -> ZnSO4 + H2
ZnSO4 + 2NaOH -> Zn(OH)2 + Na2SO4
б) CuO + H2SO4 -> CuSO4 + H2O
CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4