A-LevelChemistryElectrochemistry9701/12 · May/June 2011 · Q31 Mark
Aluminium is the most abundant metal in the Earth's crust. The extraction of aluminium is carried out by the electrolysis of aluminium oxide dissolved in molten cryolite. Which material is used for each of the electrodes in this electrolysis?
Aanode: aluminium, cathode: carbon
Banode: carbon, cathode: carbon
Canode: carbon, cathode: steel
Danode: steel, cathode: aluminium
✓ Correct answer
B: anode: carbon, cathode: carbon
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