Freezing Point and Boiling Point Review
Name: __________________________________________
Date: _____________
Answer the questions below using the provided data table and your reference table.
Solvent
Formula
Tf (°C)
Kf (°C/m) Tb (°C) Kb (°C/m)
Acetic acid
C2H4O2
16.6
3.63
117.9
3.22
Acetone
C3H6O
-94.81
2.40
56
1.80
Benzene
C6H6
5.5
5.07
80.15
2.53
Carbon tetrachloride
CCl4
-23
29.8
76.5
5.03
Glycerol
C3H8O3
18.2
3.56
290
6.52
Toluene
C7H8
-94.91
3.55
110.6
3.33
1. If the boiling point of 86 g of glycerol is raised by 19.6°C, how many grams of calcium
chloride must be dissolved in it?
2. What is the molar mass of an unknown covalent solute if 57.9 g of it added to 97.0 g of
toluene causes the solution to freeze at -120°C?
3. At STP what temperature will an aqueous solution containing 164 g of iron (II) sulfate freeze
at?
4. What is the boiling point elevation when 97.3 g of carbon disulfide is dissolved in 276 g of
benzene?
5. How many kilograms of acetic acid must be present if a solution containing 291 g of sodium
chloride dissolved in acetic acid has a freezing point of 11°C?
6. How many moles of magnesium bromide must be dissolved in 173 g of water in order for the
solution to boil at 103°C at STP?
7. What is the freezing point depression of a solution containing 19.7 g of sucrose (C12H22O11) in
200 g of carbon tetrachloride?