Question

Both Al2O3 and ZnO are amphoteric oxides.justify your answer with the help of two relevant chemical equations by taking Al2O3 as example.

Answer 1

al2o3+hcl --> alcl3 + h2o
al2o3 + naoh---> alna2 + h2o

zno + hcl -----> zncl2 + h2o
zno +naoh----> zn(nao)2 + h2

Answer 2

Al₂O₃ + HCl = AlCl₃ + H₂O

and

Al₂O₃ + Mg(OH)₂ = Mg(AlO₂)₂ + H₂O