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Homework Help: Redox and Half Reactions

  1. Jul 11, 2007 #1
    1. The problem statement, all variables and given/known data
    Identify the oxidizing agent and the reducing agent and write a balanced equation for each half reaction.
    MnO4(1-) + VO(2+) ----> Mn(2+) + V(OH)4 (1+)

    2. Relevant equations

    3. The attempt at a solution
    I know how to do these when there is just one atom. However, when there are molecules such as MnO4 I get confused.

    So would the oxidizing agent be VO or just V?

    Would the Half reaction for that be:

    MnO4(1-) + 3 e- ----> Mn(2+) ?
  2. jcsd
  3. Jul 11, 2007 #2
    the half reaction for MnO4- is: MnO4- (aq) + 8H+ (aq) + 5e- <-> Mn2+ (aq) + 4H2O (l)

    i would say V4+ is the reducing agent as its oxidation state goes from 4+ to 5+ thus being oxidised and the oxygen has the same -2 oxidation state through the eqn, although im not 100% sure
  4. Jul 24, 2007 #3


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    Staff: Mentor

    What is ON for manganese before and after the reaction?
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