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Why is Al(2)O(3) amphoteric oxide?...

Why is `Al_(2)O_(3)` amphoteric oxide?

Text Solution

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Because it reacts with acids as well as bases to form salts.
`Al_(2)O_(3)+6HCl to2AlCl_(3)+3H_(2)O`
`Al_(2)O_(3)+6NaOHto2Na_(3)AIO_(3)+3H_(2)O`
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