You don't say but I assume these numbers you give are the solubility of caffeine in the two solvents.
Ko/a = 10.3/2.04 = 5.049
fn = [(1+K(Vo/Va)^-n
fn is the fraction of the solute REMAINING in the aq phase after n extractions.
NOTE: I don't see any number for the volume used for the aq phase. I see the 7 mL for organic phase but nothing for the aq phase. I've show you how to do if assuming you just didn't type that information in.
Calculate the partition coefficient of caffeine in water/methylene
chloride from the following data: 10.3 g/100 mL for methylene
chloride and 2.04 g/100 mL for water.
Using the same data a student follows our procedure and extracts the caffeine using 3 extractions of 7 mL of methylene chloride. How much caffeine is in the combined 21 mL of methylene chloride? How much remained in the water?
1 answer