CO3+ H2O= Mn2O7+H2O= Li2O+H2O= K2O+N205= AI+HBr= Zn+H3PO4= MgO+H2SO4=
CO2+H2O=H2CO3 Mn2O7+H2O=2HMnO4 Li2O+H2O=2LiOH K2O+N2O5=2KNO3 2Al+6HBr=2AlBr3+3H2 3Zn+2H3PO4=Zn3(PO4)2+3H2 MgO+H2SO4=MgSO4+H2O