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Confused about the nomenclature of this compound (CrO3)

  1. Aug 29, 2012 #1

    chemist2b

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    So i'm a little confused about the nomenclature of this compound (CrO3). is it chromium (VI) oxide? chromic acid? and then Cr2O3 is just plain Chromium (III) oxide right?
     
    chemist2b, Aug 29, 2012
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  3. Aug 30, 2012 #2

    AGNuke

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    Yes, that's it!
     
    AGNuke, Aug 30, 2012
  4. Aug 30, 2012 #3

    chemisttree

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    The oxygens in CrO3 and Cr2O3 each have a formal charge of -2.

    Neither of these is chromic acid.
     
    chemisttree, Aug 30, 2012
  5. Aug 30, 2012 #4

    AGNuke

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    CrO3 is Chromium (VI) Oxide or Chromic Anhydride, as if we add water in it, it forms Chromic Acid, which is H2CrO4
     
    AGNuke, Aug 30, 2012
  6. Aug 31, 2012 #5

    chemisttree

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    The equilibrium of aqueous chromium trioxide lies far to the reactants side. Are you saying that aqueous chromic acid contains significant OH-?
     
    chemisttree, Aug 31, 2012
  7. Sep 1, 2012 #6

    AGNuke

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    I don't get what you meant. I consulted my teacher and he said that CrO3 is an acidic oxide, thus it can also be referred to as acidic anhydride.

    He also mentioned that H2CrO4 is a strong acid, can be considered as an analogue to Sulphuric acid. I can't get what you meant from equilibrium.

    See This : Chromium Trioxide
     
    Last edited: Sep 1, 2012
    AGNuke, Sep 1, 2012
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