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13 March, 12:56

As a metal corrodes, what happens to oxygen?

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  1. 13 March, 16:50
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    Oxygen is reduced. For example, corrosion of iron occurs according to the scheme:

    4Fe + 3O₂⁰ + 6H₂O = 4Fe (O⁻²H) ₃

    O₂ + 2H₂O + 4e⁻ = 4OH⁻

    Fe - 3e⁻ = Fe⁺³
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