Consider the osmotic cell-within-a-cell design sketched in the Figure. The membrane between 1 and 2 is permeable only to solvent A, and the membrane between 2 and 3 is permeable to both A and B but not C. Find an expression for the total pressure P3 in terms of P1 and the molarities [B] and [C] in cell 3. Assume that XA is much greater than XB and XC and that the solution is incompressible.
