Red blood cells have a concentration of hemoglobin (Mw ~ 68000) at 0.3 M. The osmotic pressure a body temperature (37°C) is 0.83 MPa. Water can permeate the cells walls, but not hemoglobin.24

(a) Using only the second osmotic coefficient, determine the coefficient value (L/g), and determine the activity of water at the conditions given above.

(b) Calculate the ideal solution osmotic pressure at the conditions given above.

(c) Suppose we were to transfer red blood cells in a laboratory solution at 37°C (blood banks need to do this). We want the external glucose solution to match the red blood ell’s internal osmotic pressure to avoid swelling or shrinking of the cells. If glucose has an osm