11.8     Write reactions to justify amphoteric nature of aluminium.

Answers (1)
M manish

amphoteric nature of aluminium means it shows properties of acid as well as the base. Aluminium dissolves in acid and bases.

Reaction with acids-
2Al+6HCl\rightarrow Al^{3+}+6Cl^-+3H_{2}
Reaction with the base-
2Al+2NaOH+6H_{2}O\rightarrow 2Na^{+}[Al(OH)_{4}]^-+6Cl^-+3H_{2}

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