write the equation for the cathodic reactions during rusting of ion
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The formation of rust requires iron, water and oxygen. Although it's a complex process, the chemical equation is simply 4Fe + 3O2 + 6H2O → 4Fe(OH)3.26 Apr 2018
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The chemical reaction for rusting is: 4Fe + 3O2 → 2Fe2O3. Iron is first oxidized to iron(II) ions by oxygen. In the second step, the iron(II) ions are further oxidized and combine with water and oxygen gas to produce a hydrated form of iron(III) oxide known as rust. Rusting is one of many example of corrosion.
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