Which of the following is NOT true for solutes and solvents?

A. At least one solvent must be dissolved in a solute to make a solution.
B. Solute concentration can be measured in terms of solute moles / solution volume or solute moles / solvent mass.
C. A solvent is the chemical present in a larger amount in a solution.
D. A solute is the chemical present in a smaller amount in a solution.
E. All of these are true.

Thank you!

I think A is the statement that is not true. But if A is not true, then E must be false also.

I'd say E but I'm not quite sure about B

Yep ignore what I said...

Thanks for the help! The answer was A.

solvent must be dissolved in a solute

I would say that it would have to be at least one solute must be dissolved in a solvent not the other way around.

I would make a note to question the teacher about the answers. Because, if A is true then E MUST be fasle, also, since not all of the statements are true. Therefore, the correct answers are A and E.

A. Solute must be dissolved in solvent.
B.Concn can be measured in solute mols/volume of solution (molarity) or solute mols/mass solution (malality).
C. We generally call the one in larger amount the solvent.
D. We generally call the one in smaller amount the solute.

To determine which statement is NOT true, we can evaluate each option one by one:

A. At least one solvent must be dissolved in a solute to make a solution.
This is a true statement because a solution is formed when one or more substances (solute) gets uniformly distributed and dissolved in another substance (solvent).

B. Solute concentration can be measured in terms of solute moles / solution volume or solute moles / solvent mass.
This is also a true statement. Solute concentration can be measured in terms of moles of solute divided by the volume of the solution or the mass of the solvent.

C. A solvent is the chemical present in a larger amount in a solution.
This is a true statement. The solvent is the substance that exists in a larger amount and dissolves the solute in a solution.

D. A solute is the chemical present in a smaller amount in a solution.
This statement is NOT true. A solute is the substance that exists in a smaller amount and gets dissolved in the solvent to form a solution. The solute is the substance that gets distributed in and is dissolved by the solvent.

E. All of these are true.
This is also not the correct answer because option D is not true.

Thus, the statement that is NOT true for solutes and solvents is:
D. A solute is the chemical present in a smaller amount in a solution.