Cathodic Reaction for Rusting of Iron (1 Viewer)

[wrxsti]

ive got conflicting equations for the full rusting of Iron, can anybody rite the full equation for me thamx

 

[xiao1985]

cathode, in normal conditions:

O2 + 2H2O + 4 e- ---> 4OH-

in acidic condition:

4H+ + O2 + 4 e- ---> 2 H2O

 

[Forbidden.]

I use:

Oxidation: Fe(s) --> Fe²⁺ + 2e^-
Reduction: 0.5O₂(g) + H₂O + 2e^- --> 2OH^-

Fe(s) + 0.5O₂(g) + H₂O --> Fe²⁺ + 2OH^-
Fe²⁺ + 2OH^- --> Fe(OH)₂(s)
4Fe(OH)₂ + O₂ --> 2(Fe₂O₃.H₂O) + 2H₂O