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Section 3: Colligative Properties of Solutions

Colligative Properties of Solutions

1.
What is the name for a substance that dissolves in water but does not form ions or conduct an electric current?
A)nonelectrolyte
B)electrolyte
C)insoluble
D)saturated
2.
Which of the following is not a colligative property?
A)freezing point depression
B)boiling point elevation
C)vapor pressure lowering
D)increasing solubility
3.
If 4.27 g sucrose (C12H22O11) are dissolved in 15.2 g water, what is the boiling point of the resulting solution? Kb for water = 0.512°C/m.
A)101.64°C
B)100.42°C
C)99.626°C
D)100.73°C
4.
Calculate the freezing point of a solution that contains 8.0 g of sucrose (C12H22O11) in 100 g of H2O. Kf for H2O = 1.86°C/m
A)-0.044°C
B)-0.22°C
C)-0.39°C
D)-0.44°C
5.
A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. The solution freezes at -1.23°C. Calculate the molar mass of the solute. Kf for water = 1.86°C/m.
A)39.7 g/mol
B)58.4 g/mol
C)46.2 g/mol
D)62.0 g/mol
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