Extraction Of Aluminium From Bauxite Flashcards
1
Q
Method for Aluminium extraction from Bauxite
A
Electrolysis
2
Q
Cathode in aluminum extraction is made of
A
Graphite
3
Q
Ions present in electrolyte
A
Al3+ & O2-
4
Q
Half equation at the cathode
A
Al3+ + 3e- —> Al (l)
5
Q
Halve equation at the anode
A
202- —> 02 + 4 e-
6
Q
Why dissolve electrolyte in cryolite?
A
Reduces operation temperature, saves 💰
7
Q
Who do anodes have to be replaced?
A
High temp: C (graphite anode) reacts with o2 and forms CO2, the anodes wear away!
