1. The problem statement, all variables and given/known data The solutions in the arms of a U-tube are separated at the bottom of the tube by a differentially permeable membrane. The membrane is permeable to sodium chloride but not to glucose. Side A is filled with a solution of 0.4 molar glucose and 0.5 molar sodium chloride (NaCl) and side B is filled with a solution containing 0.8 molar glucose and 0.4 molar sodium chloride. Initially the volume in both arms is the same. If you examine side A after three days, you should find...? 3. The attempt at a solution The solution is: a decrease in the concentration of NaCl, an increase in the concentration of glucose and a decrease in the water level. However, since the membrane is not permeable to glucose, why does the glucose level change? Why does the water level decrease? Thanks!