Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) 2.0 liters of a 6.0 M solution would contain 12.0 moles of solute, independent of the identity of the solute.
(2) For liquid-liquid solutions, volume of the solution is always greater than the sum of the volumes of solute and solvent because of solute-solvent repulsion effects.
(3) Osmotic pressure is the amount of pressure needed to prevent the process of osmosis from occurring.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Question

Quizplus · Accepted Answer

Statement 1 is true because the number of moles of solute in a solution is equal to the molarity (M) multiplied by the volume of the solution in liters. Thus, 6.0 M * 2.0 L = 12.0 moles.
Statement 2 is false because there are cases where the volume of the solution is less than the sum of the volumes of solute and solvent, such as in the case of certain ionic liquid-liquid solutions. 
Statement 3 is false because osmotic pressure is the pressure needed to stop the flow of solvent into a solution through a semipermeable membrane, so it cannot be used to prevent the process of osmosis from occurring.

Characterize EACH of the Three Given Statements as Being TRUE