Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Quick lab questions.

  1. Nov 25, 2008 #1
    Properties of Aggregates Lab
    1. The problem statement, all variables and given/known data
    Are the intermolecular forces or the intramolecular forces greater in paradichlorobenzene? Explain.


    2. Relevant equations
    N/A


    3. The attempt at a solution
    Confused about what 'intramolecular' forces are.
    ---------------
    Determination of Mol. Mass Of An Unknown Gas Using Vapor Density Method

    1. The problem statement, all variables and given/known data
    If a volatile liquid contained a non volatile impurity, how would the calculated molar mass be affected?


    2. Relevant equations
    N/A


    3. The attempt at a solution
    If there is a non-volatile impurity in the the volatile liquid then it would be retained while the rest of the liquid (volatile) evaporates. This means it will have a greater molar mass.
    -------------
    Freezing Point Depression
    1. The problem statement, all variables and given/known data
    Would the value of kf depend on the solute which was used in its determination? Why?


    2. Relevant equations
    ∆Tf = kf * m


    3. The attempt at a solution
    Yes, the unique molalities and ∆Tf's may affect the kf.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted