Chemistry AS AQA Unit 2 Extraction of Metals

Made these notes for my year 12 summer exam to revise and read over. There are spelling mistakes in most of my files but due to the busy exam schedule I had no time to correct them (sorry).

Most files have more information than what is needed but I feel it helps you feel more confident walking into the exam if you have a greater knowledge background and may help when having to apply knowledge to questions. Good luck :)

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  • Created by: Chelcie
  • Created on: 02-09-13 13:32

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Extraction of Metals
ELECTROLYSIS ­ Aluminium
Al is lightweight and resists corrosion
Its ore is Bauxite.
AlO
2Al3 + 6e 2Al
3O 1 ½ O + 6e
Add cryolite, NaAlF to reduce the melting point to 1240K which costs.
It uses a lot of electricity which costs.
Graphite electrodes need…

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CuCO
CuCO CuO + CO
2CuO + C 2Cu + CO


Magnesium
MnO
MnO + C Mn + CO


DISPLACEMENT BY HYDROGEN ­ Tungsten
WO
WO + 3H W + 3HO
High temperature
H is flammable
Cannot use carbon because (WC) tungsten carbide is formed.

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