323)CuCl₂ + 2KOH = Cu(OH)₂ + 2KClCu(OH)₂ + 2HNO₃ = Cu(NO₃)₂ + 2H₂OCu(NO₃)₂ + Fe = Fe(NO₃)₂ + Cu324)2Na + 2H₂O = 2NaOH + H₂2NaOH + BaCl₂ = Ba(OH)₂ + 2NaClBa(OH)₂ + H₂SO₄ = BaSO₄ + 2H₂O329)MgO + 2HNO₃ = Mg(NO₃)₂ + H₂OMg(NO₃)₂ + 2NaOH = Mg(OH)₂ + 2NaNO₃Mg(OH)₂ + 2HCl = MgCl₂ + 2H₂O330)Zn + 2HCl = ZnCl₂ + H₂ZnCl₂ + 2KOH = Zn(OH)₂ + 2KClZn(OH)₂ = ZnO + H₂O (t)