SO3 + H2O = H2SO4 N2O5 + Ca(OH)2 = Ca(NO3)2 + H2O MgO + SO3 = MgSO4 Na2O + H2O = 2NaOH ZnO + H2O = Zh(OH)2 ZnO + N2O5 = Zn(NO3)2 Ba + H2O = Ba(OH)2 Cu(OH)2 = CuO + H2O Ca(OH)2 + SO2 = CaSO3 + H2O H2SO4 + MgO = MgSO4 + H2O 3H2SO4 + Al2O3 = Al2(SO4)3 + 3H2O SO3 + 2KOH = K2SO4 + H2O