1 The purified Aluminate is dissolved in molten cryolite and electrolysed at 950 degrees. The reason for this is that the cryolite lowers aluminium’s high melting point, and therefore decreasing the cost.
T The crystolite does not dissolve as a low voltage is used in the Hall-Hevott cell (as shown below)
3 Reactions take place in the Anode and the Cathode. These can be shown as equations below:
· Al + 3e- Al
· 2O 2O +4e-
4 The pure aluminium is then removed from the cell and added to other metals to form alloys, or simply cooled to form inglots.
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