Question

Elwctrolysis of alumina is done chemical equatiuon

Answer 1

Electrolysis of the alumina/cryolite solution gives aluminium at the cathode and oxygen at the anode.
Al 3+ + 3e - Al (aluminium metal at the (-)cathode)
2O 2- - 4e - O2 (oxygen gas at the (+)anode)
Aluminium is more dense than the alumina/cryolite solution, and so falls to the bottom of the cell where it can be tapped off as pure liquid metal.
The overall reaction is
aluminium oxide aluminium + oxygen
2Al 2 3+ O3 2- (l) 4Al (l) + 3O 2(g)
Oxygen is discharged at the positive carbon (graphite) anode.Oxygen reacts with the carbon anode to form carbon dioxide gas.
carbon + oxygen carbon dioxide
C (s) + O2(g) CO 2(g)
The carbon anode slowly reacts to make carbon dioxide and needs to be replaced regularly.

Answer 2

Al203
Chemical equations