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Homework Help: Oxidation #s For Zn(NO3)2 ?

  1. Sep 27, 2007 #1
    [SOLVED] Oxidation #s For Zn(NO3)2 ???

    1. The problem statement, all variables and given/known data

    I need to ballance the redox reaction underneath using the 1/2 reaction method but the problem is that I can't figure out the oxidation #s for Zn(NO3)2 and after that, I'm having problems balancing it.

    2. Relevant equations

    Zn + HNO3 ---> Zn(NO3)2 + 2NH4NO3 + H2O

    3. The attempt at a solution

    On the reactants side, the oxidation # for Zn is 0, For H->+1 for N--->+5 for O3--->-2/atom
  2. jcsd
  3. Sep 27, 2007 #2
    NO3 should carry it's original Oxidation numbers when becoming Zn(NO3)2 since it's splits from H which carries a +1 charge. That would make NO3- (a -1 oxidation number for the entire ion since you already stated that N=+5 and O=-2 per molecule). Combining 2 NO3- groups with Zn would give Zn an oxidation number of 2+ in order to cancel out the 2- charge from the 2 NO3 groups, which is a common oxidation number for Zn.
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