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React with Br2 & I2 Higher Question

  1. Jan 11, 2016 #1
    1. The problem statement, all variables and given/known data
    Which of the following will react with Br2 but not with I2?
    A OH−
    B SO3 2−
    C Fe2+
    D Mn2+

    2. Relevant equations
    N/A

    3. The attempt at a solution
    The answer given in the marking scheme is C, and I can't figure out how to come to that conclusion. Is it something to do with electronegativity? London dispersion forces? My exam is tomorrow morning and I'm freaking out about this just a little...!
     
    Last edited: Jan 11, 2016
  2. jcsd
  3. Jan 11, 2016 #2

    Borek

    User Avatar

    Staff: Mentor

    Redox potentials.
     
  4. Jan 11, 2016 #3
    Ah, that makes sense! Thank you very much :smile:
     
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