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Homework Help: Oxidation state of oxygen in peroxides

  1. Oct 5, 2015 #1
    1. The problem statement, all variables and given/known data
    The oxidation state of oxygen in all compounds is -2, except in peroxides such as H2O2, Na2O2 and BaO2 where it is -1. If it is -1, then why can't we write H2O2 and Na2O2 as HO and NaO respectively?
  2. jcsd
  3. Oct 5, 2015 #2


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    Basically because they are different molecules. The O-O presence is essential.
  4. Oct 5, 2015 #3
    I see thanks
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