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JAMB Chemistry 2007 Question 6

Question 6

Metals and their Compounds

The reddish-brown rust on iron roofing sheets consists of

  1. A.Fe3+(H2O)6
  2. B.FeO.H2O
  3. C.Fe2O3.3H2O
  4. D.Fe3O4.2H2O.
Show the answer and explanation

Answer: C (Fe2O3.3H2O)

Explanation

Rust is hydrated iron(III) oxide, Fe2O3.xH2O, usually written Fe2O3.3H2O.