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Explain the Amphoteric nature of Aluminium, give equations.

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Aluminium reacts both with acid and base so it behaves as amphoteric nature.

2Al(s) + 6HCl(aq) → 2Al3+(aq) + 6Cl(aq) + 3H2(g) behaving as acid.

2Al(s) + 2NaOH(aq) + 6H2O(l) → 2Na+[Al(OH)4] (aq) + 3H2(g) behaving as base.

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