You want to determine the concentration of a liquid solute dissolved in a liquid solvent. Which of the following would be the best to use?

The options choices are:

volume/volume percent

molarity

molality

mass/mass percent

The right answer is volume / volume percent.

You must know that all of them are valid concentration measures. Volume / volume percent is best in this case because the volumes of two liquids can be determined very easily using the simplest lab equipment.