Cov tshuaj tiv thaiv nrog cov kua qaub:
Al2O3 + 6HCl = 2AlCl3 + 3H2O
Al2O3 {{2}} 6H+ = 2Al3+ + 3H2O
Cov tshuaj tiv thaiv nrog molten alkali:
Al2O3 {{4}} 2NaOH == 2NaAlO2 (sodium metaaluminate) + H2O
Cov tshuaj tiv thaiv nrog kua alkali:
Al2O3+ 2NaOH +3H2O = 2Na [Al (OH) 4] (sodium tetrahydroxy aluminate)
Nws kuj tseem tuaj yeem hais tau tias: Al2O3 {{5}} 2OH- = 2AlO2- (ion metalumin metal metalate metal ion metalumin)) +H2O