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Homework Help: Paper chromatography

  1. Sep 26, 2007 #1
    [SOLVED] paper chromatography

    1. The problem statement, all variables and given/known data
    Which reagent is the best to develop Mn+2? Briefly explain.


    2. Relevant equations

    Mn^+2 + 2OH- -> Mn(OH)_2 (s)(pale pink)

    Mn^+2 + C_2O_4^-2 -> MnC2O4 (s)(pale pink)

    2Mn^+2 + [Fe(CN)_6]^-4 -> Mn_2Fe(CN)_6 (s pale green)

    2Mn^+2 + 5(BiO_3)^-1 + 14H+ -> 2(MnO_4)^-1 (aq deep purple) + 5Bi^+3 +7H_2O


    3. The attempt at a solution
    ( _ represents subscripts H_2O represents water. )

    At first I thought the second choice would be correct because it uses ions that are not found in the experiment at all, however now I am starting to think it is the last choice because it's product is an aqueous and not a solid, I would appreciate some feedback, the thing stopping me from thinking the last choice is correct is that it creates 2 other products.
     
  2. jcsd
  3. Sep 27, 2007 #2
    anyone have any idea
     
  4. Sep 27, 2007 #3

    chemisttree

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    A dark color makes the spot easier to see. Which one will give the darkest color?
    Hint: in this example the word 'pale' can be replaced with 'barely visible'.
     
  5. Sep 27, 2007 #4
    ah ok so then BiO_3 ^-1 would be the best reagent choice :)
     
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