Al>Al2O3>Al(OH)>Al(NO3)3>AlCl3
2Al+3O₂ =2Al₂O₃ Al₂O₃ +6HCl =-2AlCl₃ + 3H₂O AlCl₃ + 3NaOH = Al(OH)₃ +3NaCl Al(OH)₃ + 3HNO₃ =Al(NO₃)₃ + 3H₂O Al(NO₃)₃ + Mg =Al + Mg(NO₃)₂ 4Al + 3O₂ = 2Al₂O₃ Al₂O₃ + 2Si = 2SiO₂ + Al₂O