17. Compared to the freezing point and boiling point of water at 1.0 atm, a 0.5 M aqueous solution of NaCl at 1.0 atm has
(1) a lower freezing point and a lower boiling point
(2) a lower freezing point and a higher boiling point
(3) a higher freezing point and a lower boiling point
(4) a higher freezing point and a higher boiling point
Explanation: When a compound gets dissolved in water (or any other pure solvent), it increases the boiling point of water (or that pure solvent) and decreases its freezing point. We have NaCl being dissolved in water. Therefore, we should expect the boiling point of solution to increase and freezing point to decrease as compared to water.
Answer: (2)