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Boiling Point

  1. Feb 4, 2007 #1
    1. The problem statement, all variables and given/known data
    Calculate the boiling point (in degrees C) of a solution made by dissolving 7.49 g of urea {CO(NH2)2} in 28.0 g of water. The Kbp of the solvent is 0.512 K/m and the normal boiling point is 373 K


    2. Relevant equations
    Delta Tf = (i)(m)(Kbp)


    3. The attempt at a solution

    Kbp= 0.512 k/m

    molality (m)= ?
    first I have to find molality
    (7.49g/60g)/(.028 kg water) = 4.458m

    I don't know what the i value is. What do I do with the normal boiling point?

    The answer is 102.283 celicus this would be 375.28K.
    Then I did some research on the internet I came across this site that didn't use the i value is this possible.
    375.28= 373 + delta Tf
     
    Last edited: Feb 4, 2007
  2. jcsd
  3. Jun 17, 2007 #2
    I came to this forum to try and help out, but I see only so much stuff I don't know anything about anymore ... Obviously my education outdated LOL
    I've reached my bioling point ... I'm going out for a smoke !
     
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