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Extraction of Aluminium
Aluminium is extracted using electrolysis because it is too reactive to be extracted using carbon.
Ore – bauxite – aluminium oxide
The ore is dissolved in cryolite to lower the melting point.
Temperature 900 C
Al3+ + 3e- Al
2O2- O2 + 4e-
Extracting aluminium is expensive because of the high
cost of electricity. Extraction takes place where there is a
cheap source of electricity e.g. hydroelectric power