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Determining the composition of a coordination compound using molar conductivity

  1. Oct 28, 2009 #1
    1. The problem statement, all variables and given/known data

    The substance CoBr3 dot 4 NH3 dot 2 H2O ha a molar conductivity of 42 kS/m at infinite dilution. Indicate the composition of the coordination sphere.

    2. Relevant equations

    I don't know any relevant equations.

    3. The attempt at a solution

    Where can we read about how molar conductivity can tell us the composition of a coordination sphere? I googled this and have not found a tutorial on how to do this type of question.

    I don't recall molar conductivity being mentioned in my high school chemistry class when we did coordination spheres.
  2. jcsd
  3. Oct 28, 2009 #2


    User Avatar

    Staff: Mentor

    There is no direct link, however, think how the molar conductivity depends on the ions present in the solution - types, numbers, charges... Once you can estimate what ions are present, you can conclude how the complex looks.

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