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oxidation state

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  • hoay's Avatar
    174 posts since Jul '11
    • iron (II) is written as Fe2+ or Fe+2.Is there a difference in this writting notation?

      Oxidation number or oxidation state are same terms. ? please explain.

      Edited by hoay 12 Jan `18, 4:10AM
  • Moderator
    H2 Chemistry @ BedokFunland JC (near VJC & TJC)
    UltimaOnline's Avatar
    14,517 posts since May '05
    • Originally posted by hoay:

      iron (II) is written as Fe2+ or Fe+2.Is there a difference in this writting notation?

      Oxidation number or oxidation state are same terms. ? please explain.


      (II) refers to ON. (+2) refers to OS. At Uni levels, slight difference. For A level purposes, they are equivalent.

      2+ refers to dipositive ionic charge. So the dipositive Fe2+(aq) is an Fe(II) species.

      There is no such thing as Fe+2, and Cambridge will penalize for writing such nonsense.

      Example of such nonsense is seen in this '4x thumbs down' reply by 'Zhi Li', whose Chemistry Fail.

      https://sg.answers.yahoo.com/question/index?qid=20120621233431AAuIDMv

      Edited by UltimaOnline 12 Jan `18, 12:41PM
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