Advertisements
Advertisements
Question
Give equation for the following conversion: Aluminium hydroxide to aluminium oxide.
Advertisements
Solution
2Al(OH)3 → Al2O3 + 3H2O
APPEARS IN
RELATED QUESTIONS
How is the following metallic oxide reduced? Write equations:
Iron (ll) oxide
Write a balanced chemical equation for each of the following reactions :
(i) Reduction of copper (II) oxide by hydrogen
Name oxide of one metal which is reduced by (give equation): Electrolytic reduction
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
what is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?
Name a non-metallic element which has a metallic lustre
What metallic property is shown by the non-metal graphite?
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) The iron (III) oxide?
In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence.
"By dissolving aluminium oxide in cryolite, a ______ (conducting / non- conducting) solution is produced.
(iii) Why so much graphite required for this electrolytic process.
(iv) Write the equation for the reaction which takes place at cathode.
Give the equation for the reduction of Zinc oxide.
