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Molal concentraion. Gen Chem 2

  1. Jan 21, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the approximate molal concentration of the solute pure ether? Kb is 2.02, normal boiling point is 37 degrees Celsius.

    2. Relevant equations

    ΔTb= Kb * m

    ΔTb is the change in boiling point temp.
    Kb for ether is 2.02
    m is the molal concentration which im trying to find.
    37 celsius is the normal boiling point

    3. The attempt at a solution


    ΔTb/Kb = m

    i tried 37 degrees divided by (Kb value 2.02), and i also tried 137/2.02 -> i added 100 degrees because the boiling point elevation thing. Both answers were wrong
     
  2. jcsd
  3. Jan 31, 2012 #2

    Borek

    User Avatar

    Staff: Mentor

    You need to know boiling point of your mixture, without it you will be not able to calculate bp elevation.
     
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