1. Al(NO₃)₃ -> Al(OH)₃:
Al(NO₃)₃ + 3NaOH -> Al(OH)₃ + 3NaNO₃
2. Al(OH)₃ -> Na[Al(OH)₄]:
Al(OH)₃ + NaOH -> Na[Al(OH)₄] + H₂O
3. Na[Al(OH)₄] -> AlCl₃:
Na[Al(OH)₄] + 3HCl -> AlCl₃ + 3NaOH
4. AlCl₃ -> Al:
2AlCl₃ + 3H₂O -> 2Al(OH)₃ + 6HCl
2Al(OH)₃ -> Al + 3H₂O
5. Al -> NaAlO₂:
2Al + 2NaOH + 2H₂O -> 2NaAlO₂ + 3H₂