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Homework Help: Balancing Redox Rxn

  1. Oct 4, 2007 #1
    1. The problem statement, all variables and given/known data

    “From knowledge of oxidation states of nitrogen in the product as determined experimentally, and the oxidation state of nitrogen in each species in the list of possible products, select the most likely product of the following:
    ….NO3- (I found this to be the product)
    Write the balanced REDOX equation for the reaction between bromate and hydroxylammonium using the ½ reaction method.”

    So basically I have to balance the chemical equation using the ‘half rxn method’ in order to get NO3- but I’m not sure if my final balanced equation is right and if I’ve done the oxidation half and reduction half reactions correctly.

    2. Relevant equations

    KBrO3 + NH3OHCL ------> Br- + Some nitrogen containing product (I found the product to be NO3-)

    In aqueous solution

    3. The attempt at a solution

    I made K and Cl spectator ions

    Not writing the ½ reactions, I got this for the final equation:

    BrO3- + H2O + NH3OH+ --> Br- + NO3- + 2H3O+

    Problem is that I’m having trouble putting the spectator ions (Cl and K) back into the equation. Could someone show me how to add Cl back in and how to properly do the oxidation/reduction halves?
    Last edited: Oct 4, 2007
  2. jcsd
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