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    Hi, I did an experiment investigating transition metal ions and am confused by one of the questions:

    From comparison of "a" (molar absorptivity" what general conclusions can be drawn regarding
    i)the electronic processes that generate colour in each solution and the geometries of the transition metal complexes

    Im really stuck on this and any help would be appreciated

    the 3 solutions had a's of 949.5 (purple), 11.835 (pale pink/rose) and 338.05 (blue)
    in order they were KMnO4, CoCl2/H20 and CoCl2/NH4SCN
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    This is a strange question, normally you don't compare absorption coefficients but rather the wavelengths at which they absorb. Are all of these measured at the same wavelength?
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    (Original post by Tori1607)
    Hi, I did an experiment investigating transition metal ions and am confused by one of the questions:

    From comparison of "a" (molar absorptivity" what general conclusions can be drawn regarding
    i)the electronic processes that generate colour in each solution and the geometries of the transition metal complexes

    Im really stuck on this and any help would be appreciated

    the 3 solutions had a's of 949.5 (purple), 11.835 (pale pink/rose) and 338.05 (blue)
    in order they were KMnO4, CoCl2/H20 and CoCl2/NH4SCN
    You need to think about the origin of the colours. In particular think about whether these are d-d transitions, or have some other origin, and also think about the spectrochemical series.
 
 
 
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