Aluminium

Aluminium

1. Acid

   • 2Al + 6HCl ----►2AlCl3 + 3H2

2. Base

   • 2Al + 2NaOH + H2O ----►2NaAlO2 + 3H2

3. O2

   • 2Al + 3O2 --Δ--►2Al2O3

4. N2

   • 2Al + N2 --Δ--►2AlN

5. Cl2

   • 2Al + 3Cl2 --Δ--►2AlCl3

6. Oxide + Acis and Base

   • Al2O3 + 2NaOH ----►2NaAlO2 + H2O
   • Al2O3 + 6HCl ----►2AlCl3 + 3H2O

7. Hydroxide + Acid and Base

   • Al(OH)3 + NaOH ----►NaAlO2 + 2H2O
   • Al(OH)3 + 3HCl ----►AlCl3 + H2O

8. Al's covalent compounds as Louise acids

   • AlH3 + LiH ----►Li[AlH4]

9. Reactivity

   • Al + H2O ----►X
   • Al + conc.HNO3 ----►X
   • Al + conc.H2SO4 ----►X

10. Speciality

    • Has both ion and covalent compounds: But how can both be strong enough?

11. Complex compound

    • [Al(H2O)6]3+ -----►[Al(OH)(H2O)5]2+ + H+[Al(H2O)6]3+ -----►[Al(OH)(H2O)5]2+ + H+
    • [Al(OH)(H2O)5]2+-----►[Al(OH)2(H2O)4]2+ + H+[Al(OH)(H2O)5]2+-----►[Al(OH)2(H2O)4]2+ + H+
    • [Al(OH)2(H2O)4]2+-----►[Al(OH)3(H2O)3] + H+[Al(OH)2(H2O)4]2+-----►[Al(OH)3(H2O)3] + H+