In an extraction process compound A is transferred from one solvent to another solvent. The two solvent may be, for example, water and dichloromethane. These two solvents are immiscible and when mixing them together, one of the solvents, say solvent 1, forms droplets that are dispersed in solvent 2, as depicted [...].
Fig. 4 shows the concentration profile across the interface between the two solvents. For this concentration profile, answer the following questions:
(a) In which direction is the mass transfer, from solvent 1 to solvent 2 or vice versa? Motivate your answer by a short explanation (2 pt).
How can you tell which direction the mass transfer will go?
I would assume that because solvent 1 forms droplets in solvent 2, then solvent 1 should be the organic phase. Would the mass transfer be from solvent 2 to solvent 1? Because the aqueous phase would contain compound A.
Just to see if I have understood it correctly, if I am given the concentration profile below. Then mass transfer would occur from the aqueous phase to the organic phase because the aqueous phase has a higher concentration.