Question

why is Aluminium oxide considered as amphoteric oxide

Answer 1

Aluminium Oxide (Al2O3) reacts with both acids and bases to from its correspondent salts and water. So it is also known as Amphoteric Oxide.

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Answer 2

Answer:

Aluminium oxide is termed as an amphoteric oxide as it shows chemical reactivity with both acids as well as bases. In some cases, it behaves as a basic oxide and reacts with an acid to form salt and water whereas in other cases, it reacts with a base to produce the same.

An example of such equation is given below:

Al2O3(s) + 6HCl(aq) -------> 2AlCl3(aq) + 3H20(l).

In this reaction, aluminium oxide behaves as a basic oxide and reacts with an acid to produce salt and water.