CP Chemistry
Notes/Diagrams
Name:
_______________________________________
Period: _____
Colligative Properties Notes
Additional Notes/Examples
Notetaking
Colligative Properties:



 includes:
 vapor pressure
 boiling point
 freezing point
 osmotic pressure
Vapor Pressure:
 definition:

 reason:
Boiling Point:
 definition:

 reason:
Additional Notes/Examples
Notetaking
Boiling Point Question:
A solvent has a boiling point of 200 oC.
When 10 grams of salt is dissolved in the
solvent, what is most likely the new
boiling point?
a.
b.
c.
210 oC
200 oC
190 oC
Freezing Point:
 definition:

 reason:
Freezing Point Question:
A solvent has a freezing point of 10 oC.
What is the most likely freezing point if 5
grams of salt is mixed with the solvent?
a.
b.
c.
5 oC
10 oC
15 oC
Additional Notes/Examples
Notetaking
Osmotic Pressure:
 definition:

 reason:
Colligative Properties Worksheet
Name_________________________
1. A property that depends on the number of solute particles (concentration) is said to be a
_________________ property.
2. List 5 examples of colligative properties:
a.
b.
c.
d.
e.
3. What colligative property is responsible for keeping water from freezing in a car’s cooling
system? _________________
4. What colligative property causes ice to melt on the street after salt has been spread on it?
_________________
5. The boiling point of a liquid is the temperature at which its _________________
_________________ is equal to _________________ _________________.
6. What colligative property is responsible for keeping water from boiling over during the summer
in a car’s cooling system? _________________
7. The pressure of vapor in _________________ with its liquid is referred to as vapor
pressure. It is a measure of the tendency of the molecules of a liquid to escape into the
_________________ phase.
8. When a solid is dissolved in a liquid, the vapor pressure of the liquid is _________________
because the surface area from which molecules can evaporate is reduced.
9. How would you make a saturated solution from an unsaturated solution?
10. Why does increasing the solute concentration decrease the melting point?
11. Explain why a solution has a higher boiling point than the pure solvent.
12. If solution A contains 5 grams of NaCl in 100 grams of water and solution B contains 10
grams of NaCl in 100 grams of water, which of the following comparisons is true? Explain
why each comparison you chose is true.
A. A has a higher boiling point and a higher freezing point than B.
B. A has a lower boiling point and a lower freezing point than B.
C. A has a lower boiling point and a higher freezing point than B.
D. A has a higher boiling point and a lower freezing point than B.
Explanations:
13. Adding sodium chloride to water will cause the:
A. boiling point to rise and the freezing point to lower.
B. boiling point to lower and the freezing point to rise.
C. both boiling point and freezing point to rise.
D. both boiling point and freezing point to lower.
Explain your answer using complete sentences: