Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration, in order to balance the solute concentration on both sides of the membrane.
Osmosis is the movement of solvent molecules (usually water) across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration, in order to equalize the solute concentrations on both sides of the membrane.
