extraction of aluminium by electrolysis Flashcards
1
Q
what is ore AL203 extracted from
A
bauxite
2
Q
after mining and purifying bauxite what is left and what is it
A
-a white powder
-this is pure aluminium oxide
3
Q
what is a limitation of this
A
it is expensive
4
Q
what is aluminium oxides m.p
A
2000 degreed
5
Q
what is used to bring down aluminiums high M.P
A
the aluminium oxide is dissolved in cryolite
6
Q
after alluvium oxide is dissolved in cryolite what is the M.P
A
about 900 degreed
7
Q
why is it good to bring down the M.P
A
-it uses less energy making the process cheaper
8
Q
what forms at the cathode and is it reduction or oxidation
A
-aluminum
-reduction
9
Q
what forms at the anode and is it reduction or oxidation
A
-oxygen
-oxidation
