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Homework Help: Halogen Reactions

  1. Feb 6, 2016 #1
    1. The problem statement, all variables and given/known data
    Cl2 and BrCl each react with aqueous KI.
    (i) Describe what would be seen when Cl2 is bubbled through aqueous KI for several minutes.
    initially :
    after several minutes :

    2. Relevant equations

    3. The attempt at a solution
    I thought initially Cl2 would get decolourised, so the green/pale yellow colour fades
    And after several minutes, a purple vapour would form (I2)
  2. jcsd
  3. Feb 7, 2016 #2
    Is what you have thought wrong? I see no trouble in it, unless the rate of reaction was too slow that nothing happend while you kept waiting.
  4. Feb 7, 2016 #3
    The answer is:
    initially: the solution turns yellow/brown
    finally: black/grey solid forms.
    I though iodine gas would form, not solid.
  5. Feb 8, 2016 #4
    Two questions:
    1) Are both Cl2 and BrCl reacting with KI in different beakers or the same one?
    2) Are the reaction conditions given?
  6. Feb 8, 2016 #5
    I think they are reacting in one beaker and there are no reaction conditions given.
  7. Feb 9, 2016 #6
    I am really not sure what happens. Could it be that another inter-halogen compound forms?
  8. Feb 10, 2016 #7
    I've no idea, they haven't provided a reaction.
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