Question

Which of the statements about the effect of solutes on solutions is true?

Select one:
a. Solutes raise the boiling point of a solvent.
b. Solutes raise the freezing point of a solvent.
c. Water with a solute dissolved in it will freeze at 0°C.
d. Antifreeze boils at a lower temperature than pure water.

Answer 1

Solutes increase the boiling point (boiling point elevation) and decrease the freezing point (freezing point depression) of a solvent. The correct answer is a: Solutes raise the boiling point of a solvent. So the correct option is a.

Step-by-step explanation:

The correct statement about the effect of solutes on solutions is: Solutes raise the boiling point of a solvent. When a solute, such as salt, is dissolved in a solvent like water, the resulting solution has a higher boiling point than the pure solvent. This is known as boiling point elevation. Conversely, solutes also cause the freezing point of the solution to be lower than that of the pure solvent, which is referred to as freezing point depression. For instance, adding antifreeze, such as ethylene glycol, to water in a car's radiator will lower the freezing point to prevent the engine from freezing in cold weather, and it will allow the car to operate at temperatures higher than 100°C without boiling over.

Answer 2

A) Solutes raise the boiling point of a solvent.

Step-by-step explanation:

When the solutes are added into solvents boiling point of solvents increases.

Consider the example of NaCl in water:

The water boil when the molecules of water overcome the surrounding pressure and turn into gaseous phase.

But when we added the the salt it splits into the anion and cation and intermolecular forced between water molecules altered. The di pole is created one side becomes positive and other becomes negative. This di pole interaction is stronger than hydrogen bonding. So more energy in required to move the particles apart from each other.

Thus boiling point increases and compared to pure water.