in the extraction of aluminium why we used carbon electrode both as anode and cathode - Chemistry - General Principles and Processes of Isolation of Elements

Question

in the extraction of aluminium why we used carbon electrode both
as anode and cathode pls explain with reactions

Shubhangini Kumari · Accepted Answer

Dear student!
We use graphite (carbon) as anode and cathode both are used when
highly reactive Aluminium oxide is electrolyzed, the carbon anode
is molten and degraded by oxygen formed and comes out in the form
of carbon dioxide gas, while the negative carbon cathode behaves as
inert electrode because the aluminium is more reactive than Carbon
and so, carbon does not reacts with aluminium ion and just provides
a plot to unite them as Al-metal

in the extraction of aluminium...why we used carbon electrode..both as anode and cathode.......pls explain..with reactions...