Initially, pure solvent. If the solution solvent solute particle particle (Hâ‚‚O). Part A: Semipermeable membrane. Net movement of Hâ‚‚O is from pure water side to solution side. At equilibrium, 100 pressure applied to equalize fluid. At equilibrium, the flow of Hâ‚‚O is the same in both directions, so there is no net movement of Hâ‚‚O. Submit Request Answer levels in both arms. Osmosis is the process of a solvent moving from one compartment to another, across a semipermeable membrane, toward higher solute concentration. Osmotic pressure generated at equilibrium due to the different heights of liquid on either side of the membrane and is equivalent to the pressure needed to equalize the fluid levels across the membrane equals osmotic pressure. If water in the left arm of the U-tube is replaced by a solution more concentrated than the one in the right arm, what will happen? Nothing will happen, because volumes and compounds are the same in both arms. The water will move through the semipermeable membrane toward the less.