What is the attractive force of solute particles in a concentrated solution?
a. Diffusion pressure
b. Gas pressure
c. Hydrostatic pressure
d. Osmotic pressure
ANS: D
Osmotic pressure is the force produced by solvent particles under certain conditions.
If a solution is placed on one side of a semipermeable membrane and pure solvent on the other, solvent molecules will move through the membrane into the solution. The force driving solvent molecules through the membrane is osmotic pressure (Figure 12-2, A).
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