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: Partition law

  1. Apr 26, 2010 #1
    1. The problem statement, all variables and given/known data

    When 200 cm^3 of an aqueous solution X with concentration 10.0 g/dm^3 was shaken with 100cm^3 of solvent 1-pentanol , 1.60 g of X was extracted . If the aqueous solution was once again shaken with 100 cm^3 of 1-pentanol after the first extraction , what is the mass of X extracted ? [The molecular state of X in water and in 1-pentanol are the same]

    2. Relevant equations



    3. The attempt at a solution

    1000 cm^3 of aqeous solution gives 10 g of X so 200 cm^3 of aqueous solution gives 2 g of X .

    the partition constant , K = (1.6/100)/(0.4/200) , K=8

    Second extraction ,

    8=(X/100)/((0.4-X)/200)

    so X=0.32 g

    Am i correct ?
     
  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