Which of the following is NOT true of colligative properties? Colligative properties are...
A. dependent on the mass of solute present.
B. independent of the chemical identity of the solute.
C. dependent on the molar mass of the solute.
D. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent.
E. all of these are true.
i think it's B since chemical identity is not what really affects the solution
I don't like answer B any more tonight than I did several nights ago; however, I think B is the correct answer from the spirit of the problem.
when you said that you don't like answer B any more does that mean you are unsure about this
To determine which of the options is NOT true of colligative properties, we need to understand what colligative properties are.
Colligative properties are physical properties of a solvent that depend on the number of solute particles, rather than the chemical identity of the solute. These properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
Let's evaluate each option.
A. Dependent on the mass of solute present: This is true. Colligative properties depend on the concentration of solute particles, which can be represented by the mass of the solute.
B. Independent of the chemical identity of the solute: This is NOT true. Colligative properties are indeed independent of the chemical identity of the solute. The properties are solely determined by the number of solute particles, not their specific nature. Thus, the correct answer to the question is B.
C. Dependent on the molar mass of the solute: This is true. Colligative properties are related to the concentration of solute particles, and the molar mass affects the number of particles in a given mass of solute.
D. Responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent: This is true. One of the colligative properties is vapor pressure lowering, which is observed when a non-volatile solute is added to a solvent.
E. All of these are true: This is NOT the correct answer, as option B is not true.
In summary, the correct choice is B - colligative properties are independent of the chemical identity of the solute.