Notifications
Clear all
0
03/01/2022 1:15 pm
Topic starter
In the following sets of reactants which two sets best exhibit the amphoteric characters of Al2O3. xH2O?
Set 1: Al2O3.xH2O (s) and OH- (aq)
Set 2: Al2O3 .xH2O (s) and H2O (l)
Set 3: Al2O3.xH2O (s) and H+ (aq)
Set 4: Al2O3.xH2O (s) and NH3 (aq)
(a) 1 and 2
(b) 1 and 3
(c) 2 and 4
(d) 3 and 4
1 Answer
0
03/01/2022 1:17 pm
Correct answer: (b) 1 and 3
Explanation:
Aluminium oxide is amphoteric oxide because it shows the properties of the both acidic and basic oxides. It reacts with both acids and bases to form salt and water.
Al2O3. xH2O + 2NaOH → NaAlO2 + H2O
Al2O3. xH2O + HCl → AlCl3 + H2O