# 7-ColligativePropertiesPractice-PT-HONORS

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```					Name:                                      Date:                                     Block:
Colligative Properties – Honors
Colligative Properties: are the physical properties of solutions that are affected by the number of solute
particles but not the identity of the dissolved solute particles.
∆Tf = Kf ● m ● # of particles                                       ∆Tb = Kb ● m ● # of particles

EXAMPLE: What is the freezing point of a solution of 100 g of glucose (MW 180) in 2 Kg of acetic acid?

∆Tf = Kf x m x #     = ∆Tf = 3.9 ●       100      ● 1 = 390_ = 1.08 oC         FP = 16.63 – 1.08 = 15.55oC
180 ● 2              3600
1. What is the boiling point of a nonelectrolyte solution of 200 g of sucrose (MW 342) in 500 g of carbon
disulfide?

2. 100 g of salt is added to 500 g of water. What is the freezing point of the solution?

3. 150 g of sugar (mw = 342g)is added to 750 g of benzene. What is the boiling point of this solution?

4. What is the boiling point of a solution made with 300 g of NaCl dissolved in 750 g of acetone?

5. What is the freezing point of a solution that has 100 g of BaCl2 dissolved in 2.2 Kg of water?

Unit – 6 Solutions
Name:                                       Date:                                    Block:

6.   For a 0.222 m aqueous solution of sucrose, C12H22O11, What is the boiling point?

7.    If I add 45 g of sodium chloride to 500 g of water, what will the melting point be of the resulting
solution?

8. 56.25 g of NaCl are added to 625 g of water, what is the boiling point of this solution?

9. Which solution will have a higher boiling point: A solution containing 105 g of sucrose (C12H22O11) in
500 g of water or a solution containing 35 g of sodium chloride in 500 g of water?

10. If I add 45 grams of sodium chloride to 500 grams of water, what will the melting and boiling points be
of the resulting solution?

Unit – 6 Solutions
Name:                             Date:                           Block:

Molal Freezing Point Depression and Molal Boiling
Point Elevation Constants
Solvent            Normal             Kf ,         Normal              Kb ,
0
Freezing Point,       C m-1      Boiling Point,       0
C m-1
0                                0
C                                C
Acetic acid               16.63               3.90        117.90               3.07

Acetone                   -94.8               ___         56.00                1.71

Aniline                   -6.1                -5.87       184.4                3.52

Benzene                   5.53                5.12        80.10                2.53

Carbon disulfide         -111.5               -3.80        46.3                2.34

CCl4                      -22.8               29.80        76.8                5.020

Chloroform                -63.5               4.68         61.2                3.63

Cyclohexane               6.55                20.0        80.74                2.79

Ethanol                  -114.6               1.99         78.4                1.22

Ether                    -116.3               -1.79       34.42                2.02

Naphthalene               80.2                -6.9        218.0                5.65

Nitrobenzene               5.8                 8.1        210.8                5.24

Phenol                    40.9                -7.27       181.8                3.56

Water                     0.00                1.86        100.00               0.512

Unit – 6 Solutions

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