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Vapor Pressure of Solvent

  1. Nov 16, 2013 #1

    Qube

    User Avatar
    Gold Member

    1. The problem statement, all variables and given/known data

    http://i.minus.com/juL6gvGzvWdm.png [Broken]

    2. Relevant equations

    Raoult's law: Pressure of solution = Mole fraction of solvent multiplied by vapor pressure of pure solvent. We're assuming non-volatile solutes.

    3. The attempt at a solution

    My solution:

    https://scontent-b-mia.xx.fbcdn.net/hphotos-prn1/v/556873_10201073170213135_1235629214_n.jpg?oh=a01e718c3f2218dc3d130fd0007be82b&oe=528964FD

    Prof's solution:

    http://i.minus.com/jbtmawYMvRpDpX.png [Broken]

    Who's right?
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Nov 16, 2013 #2
    I agree with your answer.
     
  4. Nov 16, 2013 #3

    Qube

    User Avatar
    Gold Member

    Yeah, it seems as if he used the mole fraction of the solute instead of the mole fraction of the solvent, which is a major boo-boo.
     
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