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redox reaction

Discussion in 'MCAT Study Question Q&A' started by inaccensa, Aug 20, 2011.

  1. inaccensa

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    3NO2+H2O-->2HNO3+NO

    I can see oxidation number of N changing NO2-->+4, HNO3-->+5, NO-->+2, how do i determine whether it is undergoing reduction or oxidation? how is this a redox reaction?
     
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  3. FutureDoctor503

    FutureDoctor503 A.W.E.S.O.M.-O
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    Oxidation and reduction occur at the same time. Hence, it's called a redox reaction (red for reduction, ox for oxidation).

    Oxidation - NO2 to HNO3 - +4 to +5 (an electron is removed)
    Reduction - NO2 to NO - +4 to +2 (electrons are added)
     
  4. inaccensa

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    Oh yeah, i got that its called disproportionation reaction when the same element is both oxidized and reduced in one of the following questions. Thanks for the reply..
     

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