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4 Fe(s) + 3 O2(g) + 2x H2O(l) ---> 2 Fe2O3.xH2O(s)

The formula of rust can also be written as Fe(OH)3 or FeO(OH).

It depends from temperature and water content in rust. Rust is essentially an iron(III)compound existing of an irregular giant lattice of FeO6-octaëdrons, central Fe3+ ions with O2-, OH- and H2O ligands.

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13y ago

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