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H2SO4 (a) At the anode: Al(s) -> Al3+(aq) + 3e- (c) State two advantages of anodisation. [2] 1. It produces a protective oxide layer on the aluminium surface which prevents further corrosion. 2. The oxide layer can be dyed different colours to give the aluminium an attractive appearance. 17 The standard enthalpy changes for the following reactions are given: C(graphite) + O2(g) -> CO2(g) AH" = -394kJ mol-1 CO(g) + 1/2O2(g) -> CO2(
- Author
- Aprillia Chan
- Language
- EN