Two aqueous solutions S_1 and S_2 are separated by a semipermeable membrane. S_1 has lower vapour pr — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

A lower vapour pressure (S_1) indicates a higher solute concentration (hypertonic solution), whereas a higher vapour pressure (S_2) indicates a lower solute concentration (hypotonic solution). Osmosis is the spontaneous net flow of solvent molecules from a region of lower solute concentration (S_2) to a region of higher solute concentration (S_1). Note: The printed key indicates B, which represents flow from S_1 to S_2, but scientifically the net flow goes from S_2 to S_1 (Option a).