1
Q
Aim?
A
Coat a layer of aluminium at aluminium object at anode
2
Q
Electrolyte used?
A
H2SO4 (aq)
3
Q
Cathode?
A
Inert electrode
4
Q
Two reactions at anode?
A
- 2H20(l) -> O2(g) + 4H+(aq) + 4e-
2. 4Al(s) + 3O2(g) -> 2Al2O3(s)
5
Q
Why oxygen needs to be formed first?
A
Reacts with aluminium surface to for a thick layer of oxides
Chemistry- Electrolysis
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