CBSE Class 11-science Answered
Write reactions to justify amphoteric nature of aluminium.
Asked by Topperlearning User | 13 Aug, 2014, 09:36: AM
Expert Answer
Amphoteric nature means showing both acidic and basic nature.
Acidic nature( Reaction with alkalis)
2Al (s) + 2NaOH(aq) + 6H2O(l) 
2 Na+ [Al(OH)4] –(aq) + 3H2(g)
2 Na+ [Al(OH)4] –(aq) + 3H2(g) Sodium
tetrahydroxoaluminate(III)
Basic nature(Reaction with acids)
2Al(s) + 6HCl (aq) → 2Al3+ (aq) + 6Cl– (aq) + 3H2 (g)
Answered by | 13 Aug, 2014, 11:36: AM
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