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Destroyer GC #141

Discussion in 'DAT Discussions' started by supera, Jul 25, 2011.

  1. supera

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    Question is

    An ionic solid gave a blue color. Which solid is most likely?

    a.BaSO4
    b.AgCl
    c.CuSO4
    d.KI
    e.LiSO4

    So, the answer is C and the explanation says Color is associated with transition metals. Choice C. But if that's the explanation why not for AgCl? Isn't Ag a transition metal too? Is this a simple memorization that I need to know? or is there are any theory back there that I am not noticing?
    Thank you!
     
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  3. Troyvdg

    Troyvdg Dentistry not Debtistry
    7+ Year Member

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    I don't have destroyer with me, but does it say if its dissolved in water? AgCl isn't soluble
     
  4. PooyaH

    2+ Year Member

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    CuSO4 is soluble and it can break into Cu2+ and SO4--. Copper gives the solution a blue color, whereas SO4-- is colorless. AgCl is insoluble.
     
  5. supera

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    Oh I see, I wasn't thinking of the solubility rule. Thanks! BTW, is there are any other example that gives out color? because I remember another question from this destroyer set stating K2Cr2O7 is expected to be colored
     

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