L1 /
16
CH1012
WORKING II
2) An amphoteric oxide is one which displays both acidic and basic properties.
Alumina Al2O3 is an example of
such an oxide.
Al2O3(s) + 6H+(aq) ® 2Al3+(aq) + 3H2O(l) (base)
Al2O3(s) + 2OH-(aq) + 3H2O(l) ®
2Al(OH)4-(aq) (acid)