CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

(a) What are amphoteric oxides?

(b) What are amphoteric metals? What happens when aluminum reacts with KOHaq?


Open in App
Solution

(a) The metallic oxides that show chemical reactions with both bases and acids are commonly referred to as amphoteric oxides. The corresponding products obtained are salt and waterH2O.

  • For example, Zinc oxideZnO and Aluminum oxideAl2O3.

(b) Amphoteric metals are metals that exhibit chemical reactions with both acids and bases.

  • For example, AluminumAl, ZincZn, and LeadPb.
  • Amphoteric metals like aluminum react with potassium hydroxide KOH in the presence of heat which leads to the liberation of hydrogen gas.
  • Consider the following chemical reaction between aluminum and potassium hydroxideKOH.
  • 2Al+2KOH+6H2O2KAlOH4+3H2

flag
Suggest Corrections
thumbs-up
10
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Water
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon