Al2O3 + 2NaOH === 2NaAlO2 + H2O
Al2O3 + 6HCl === 2AlCl3 + 3H2O
ZnO + 2NaOH === Na2ZnO2 + H2O
ZnO + 2HCl === ZnCl2 + H2O
BeO + 2NaOH === Na2BeO2 + H2O
BeO + 2HCl === BeCl2 + H2O
Al2O3 + 2NaOH === 2NaAlO2 + H2O
Al2O3 + 6HCl === 2AlCl3 + 3H2O
ZnO + 2NaOH === Na2ZnO2 + H2O
ZnO + 2HCl === ZnCl2 + H2O
BeO + 2NaOH === Na2BeO2 + H2O
BeO + 2HCl === BeCl2 + H2O