Aluminum has reacted with Fe3O4. The resulting mixture of substances was dissolved in a concentrated solution of sodium

Aluminum has reacted with Fe3O4. The resulting mixture of substances was dissolved in a concentrated solution of sodium hydroxide and filtered. The solid was burned under a chlorine atmosphere and the filtrate was treated with concentrated aluminum chloride solution. Write the equations for the described reactions.

8Al + 3Fe3O4 → 4Al2O3 + 9Fe
Al2O3 + 2NaOH + 3H2O → 2Na[Al(OH)4]
2Fe + 3Cl2 → 2FeCl3
3Na[Al(OH)4] + AlCl3 → 4Al(OH)3 + 3NaCl

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