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Topic 7: Solutions

22. Effect of solute on physical properties of water: Recalling d concept facts

1. The depression of the freezing point is dependent on
1) The nature of the solute 3) Hydrogen bonding
4) The formula of the solute
2) The concentration of dissolved particles

2. When a solute is dissolved in water, the effect on the boiling and the freezing point depends largely
on
1) Nature of the solute 3) The number of dissolved particles
2) The formula mass of the solute
4) The density of the solute

3. As a solute is added to a solvent, what happens to the freezing point and the boiling point of the
solution?
1) The freezing point decreases and the boiling point decreases
2) The freezing point decreases and the boiling point increases
3) The freezing point increases and the boiling point decreases
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4) The freezing point increases and the boiling point increases

4. What occurs as a salt dissolves in water?
1) The number of ions in the solution decreases, and the freezing point decreases
2) The number of ions in the solution decreases, and the freezing point increases
3) The number of ions in the solution increases, and the freezing point decreases
4) The number of ions in the solution increases, and the freezing point increases

5. At standard pressure when NaCl is added to water, the solution will have a
1) Higher freezing point and a lower boiling point than water
2) Higher freezing point and a higher boiling point than water
3) Lower freezing point and a higher boiling point than water
4) Lower freezing point and a lower boiling point than water

6. As ethylene glycol ( antifreeze) is added to water, the boiling point of the water is
1) Elevated, and the freezing point is depressed
2) Elevated, and the freezing point is elevated
3) Depressed, and the freezing point is depressed
4) Depressed, and the freezing point is elevated

7. As the concentration of ions in a solution is increased by addition of more solute, the conductivity of
the solution
1) Decreases, and the vapor pressure of the solution decreases
2) Decreases, and the vapor pressure of the solution increases

3) Increases, and the vapor pressure of the solution increases
4) Increases, and the vapor pressure of the solution decreases

8. When a 1M solution of aqueous solution is diluted with water, the freezing point of the water
1) Decreases and the boiling point decreases
2) Decreases and the boiling point increases
3) Increases and the boiling point decreases
4) Increases and the boiling point increases

9. What happens when water is added to aqueous solution of glucose?
1) Boiling point is elevated, and the freezing point is depressed
2) Boiling point elevated, and the freezing point is elevated
3) Boiling point is depressed, and the freezing point is depressed
4) Boiling point is depressed, and the freezing point is elevated

10. As water is added to a solution, the number of dissolved ions in the solution
1) Increases, and the concentration of the solution remains the same
2) Decreases, and the concentration of the solution increases
3) Remains the same, and the concentration of the solution decreases
4) Remains the same, and the concentration of the solution remains the same

11. As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution
1) Decreases because the concentration of the ions decreases
2) Decreases because the concentration of the ion remains the same
3) Increases because the concentration of the ions decreases
4) Increases because the concentration of the ion remains the same

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