0 votes
in Chemistry Form 4 by
edited by

The chief ore of aluminium is bauxite which mainly contains Al2O3.2H20. The ore is initially purified before Aluminium is extracted electrolitically.

  1. Identify the main impurities associated with this ore.  
  2. Sodium hydroxide solution is used in the purification process. State its role.  
  3. Given an equation for the reaction that forms Aluminium oxide (Alumina) from aluminium hydroxide.

1 Answer

0 votes
  1. Iron(III)oxide / Fe2O3
    Silicon(IV)oxide/ SiO2
  2. It reacts with acidic SiO2 and amphoteric Al2O3 so that Fe2O3 is removed as red mad
  3. 2Al(OH)3(g) arrow Al2O3(s) + 3H2O(l)
Welcome to EasyElimu Questions and Answers, where you can ask questions and receive answers from other members of the community.

5.5k questions

6.7k answers


590 users