Which of the following is NOT true of colligative properties? Colligative properties are...

A. dependent on the mass of solute present.
B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent.
C. independent of the chemical identity of the solute.
D. dependent on the molar mass of the solute.
E. all of these are true.

i can't decide whether its e or c??? please help

a. does delta T depend upon how much material is there? I think it does. mols/kg

b. Does a solute lower the vapor pressure of the solvent? I think it does.
c. Does it matter what KIND of material we add. No, only the number of particles so it IS independent of the identity of solute.
d. does it depend upn the molar mass of the solute? I think it does. mols = g/molar mass.
so I would go with e.

YOU ARE WRONG DR BOB.

DAMN YOU.

To determine whether option E or option C is the correct answer, let's examine each statement in turn:

A. Colligative properties are dependent on the mass of solute present. This statement is true. Colligative properties, such as freezing point depression, boiling point elevation, and osmotic pressure, depend on the number of solute particles present, which can be proportional to the mass of solute.

B. Colligative properties are responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. This statement is also true. Adding solute to a solvent reduces the number of solvent molecules at the surface, which lowers the vapor pressure compared to the pure solvent.

C. Colligative properties are independent of the chemical identity of the solute. This statement is not true. Colligative properties are affected by the nature of the solute particles. For example, different solutes will have different effects on freezing point depression or boiling point elevation.

D. Colligative properties are dependent on the molar mass of the solute. This statement is true. Molar mass affects colligative properties because it relates to the number of particles in a given amount of solute. As the molar mass increases, the number of solute particles decreases, resulting in a smaller effect on colligative properties.

Since option C ("independent of the chemical identity of the solute") is incorrect, the correct answer is E ("all of these are true"). All of the statements in the given options are true of colligative properties, except for option C.