Write the equation for the formation of aluminium at the cathode during the electrolysis of alumina.
`Al_2O_3 -> 2Al^(+3) + 3O^(2-)`
Reaction of cathode : `2Al^(+3) + 6e -> 2Al`
Concept: Metals and Their Alloys - Common Ores of Iron, Aluminium and Zinc
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