11.5 Colloids
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Chemistry
•
University
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Luis Bello
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35 Slides • 8 Questions
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11.5 Colloids/Suspensions
by Luis Bello
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Previous Class Colligative properties
Learning Objectives
By the end of this section, you will be able to:
Express concentrations of solution components using mole fraction and molality
Describe the effect of solute concentration on various solution properties (vapor pressure, boiling point, freezing point, and osmotic pressure)
Perform calculations using the mathematical equations that describe these various colligative effects
Describe the process of distillation and its practical applications
Explain the process of osmosis and describe how it is applied industrially and in nature
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Multiple Choice
When KCl (potassium chloride) is dissolved in water, how many particles are in solution for each unit?
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Multiple Choice
What type of substance dissolves in water but does not form ions or conduct electricity?
electrolyte
nonelectrolyte
saturated
insoluble
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Multiple Choice
Colligative properties depend on the _____ of solute particles in solution.
type
number
pH
nature
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Multiple Choice
The boiling point of a solution is ______ the boiling point of the pure solvent.
higher than
the same as
lower than
higher or lower than
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Multiple Choice
The van't Hoff factor measures the number of particles formed in solution. What is the van't Hoff factor for the compound Na2SO4?
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Multiple Choice
Adding a nonvolatile solute to a liquid will ___.
depress both the freezing point and the boiling point
elevate both the freezing point and the boiling point
depress the freezing point and elevate the boiling point
elevate the freezing point and depress the boiling point
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Multiple Choice
What mass of water is needed to dissolve 34.8 g of copper(II) sulfate in order to prepare a 0.521 m solution?
0.418
0.419
0.420
0.421
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Multiple Choice
Calculate the freezing point of a solution made from 32.7 g of propane, C3H8, dissolved in 137.0 g of benzene, C6H6. The freezing point of benzene is 5.50° C and its Kf is 5.12° C/m.
-22.2° C
-22.3° C
-22.4° C
-22.5° C
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11.5 Colloids/Suspensions
by Luis Bello
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