Question 1

Which compound is most soluble in a polar solvent?

Accepted Answer

A)  silver nitrate
B)  silver chloride
C)  silver carbonate
D)  all are of equal solubility

Question 2

The more soluble a substance is, the faster it will dissolve.

Accepted Answer

A) True 
 B)False

Question 3

Compared to pure water, a salt water solution will have a

Accepted Answer

A)  lower vapor pressure, freezing point and boiling point.
B)  higher vapor pressure, freezing point and boiling point.
C)  lower vapor pressure and freezing point and a higher boiling point.
D)  higher freezing point and a lower vapor pressure and boiling point.

Question 4

What volume of ethyl alcohol is contained in 35 mL (1 oz.) of 86 proof liquor, which is 43% (v\v) alcohol?

Accepted Answer

A)  30 mL
B)  43 mL
C)  15 mL
D)  37 mL

Question 5

Solvents and hydrated ions can usually pass though dialyzing membranes

Accepted Answer

A) True 
 B)False

Question 6

Drinking water can be purified by which of the following methods?

Accepted Answer

A)  reverse osmosis
B)  distillation
C)  ion exchange
D)  all of the choices

Question 7

A solution is prepared at 75 °C by dissolving 50.0 g of A  in 100 g of water.  When this solution is cooled to 15 °C what happens based on the following solubility plot for A.

Accepted Answer

A)  Solid A crystallizes and the solution is unsaturated.
B)  Solid A dissolves and the solution is supersaturated.
C)  Solid A crystallizes and the solution is saturated.
D)  Solid A dissolves and the solution is unsaturated.

Question 8

Which of the following is not considered a colligative property?

Accepted Answer

A)  vapor pressure
B)  boiling point
C)  conductivity
D)  freezing point

Question 9

Which of the following statements relating to a solution is not correct?

Accepted Answer

A)  A solution may contain more than one solute.
B)  A solution may contain only one solute.
C)  Water is always the solvent in a solution.
D)  More than one correct response given. D

Question 10

Iodine, I2, is very slightly soluble in water, a polar solvent, but quite soluble in toluene, a nonpolar solvent. What can be inferred about the nature of the I2 molecule?

Accepted Answer

A)  It is ionic.
B)  It is polar.
C)  It is nonpolar.
D)  Nothing can be inferred.

Question 11

The vapor pressure of a pure solvent is

Accepted Answer

A)  higher than that of a solution.
B)  impossible to determine.
C)  the same as that of a solution.
D)  lower than that of a solution.

Question 12

A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution. What is the % (v\v) of oil in the solution?

Accepted Answer

A)  30.0
B)  23.1
C)  42.9
D)  3.33

Question 13

The ability to see the scattering of light when passed through a colloid is known as

Accepted Answer

A)  the dispersing effect.
B)  a scattering ratio.
C)  an emulsifying agent.
D)  the Tyndall effect. D

Question 14

Ionic compounds are generally insoluble in non-polar solvents.

Accepted Answer

A) True 
 B)False

Question 15

A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask, and then adding enough water to give a final volume of 200.0 mL. What is the molarity of the solution?

Accepted Answer

A)  0.260
B)  0.163
C)  6.50
D)  1.24

Question 16

There is a 12 M aqueous HCl solution in the stock room, but a 6 M solution is required for an experiment. Doubling the volume of a 12 M sample with water will produce a 6 M solution.

Accepted Answer

A) True 
 B)False  True

Question 17

When sodium acetate dissolves in water, the following reaction occurs. 
This solution could be used

Accepted Answer

A)  in a hot pack.
B)  in a cold pack.
C)  either a hot pack or cold pack.
D)  neither a hot pack or cold pack.

Question 18

Dialysis and osmosis are used for the same purposes.

Accepted Answer

A) True 
 B)False

Question 19

A solution is made by dissolving 5.84 grams of NaCl in enough distilled water to give a final volume of 1.00 L. What is the molarity of the solution?

Accepted Answer

A)  0.100
B)  1.00
C)  0.0250
D)  0.400

Question 20

Two solutions with concentrations of 2% sugar and 4% sugar, respectively, are separated by a semipermeable membrane. During osmosis, there is a net flow of

Accepted Answer

A)  sugar molecules from the concentrated to the dilute solution.
B)  sugar molecules from the dilute to the concentrated solution.
C)  water molecules from the concentrated to the dilute solution.
D)  water molecules from the dilute to the concentrated solution.

Exam 7: Solutions and Colloids

Which compound is most soluble in a polar solvent?

Correct AnswerverifiedShow Answer

The more soluble a substance is, the faster it will dissolve.

Correct AnswerverifiedShow Answer

Compared to pure water, a salt water solution will have a

Correct AnswerverifiedShow Answer

What volume of ethyl alcohol is contained in 35 mL (1 oz.) of 86 proof liquor, which is 43% (v\v) alcohol?

Correct AnswerverifiedShow Answer

Solvents and hydrated ions can usually pass though dialyzing membranes

Correct AnswerverifiedShow Answer

Drinking water can be purified by which of the following methods?

Correct AnswerverifiedShow Answer

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water. When this solution is cooled to 15 °C what happens based on the following solubility plot for A.

Correct AnswerverifiedShow Answer

Which of the following is not considered a colligative property?

Correct AnswerverifiedShow Answer

Which of the following statements relating to a solution is not correct?

Correct AnswerverifiedD

Iodine, I2, is very slightly soluble in water, a polar solvent, but quite soluble in toluene, a nonpolar solvent. What can be inferred about the nature of the I2 molecule?

Correct AnswerverifiedShow Answer

The vapor pressure of a pure solvent is

Correct AnswerverifiedShow Answer

A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution. What is the % (v\v) of oil in the solution?

Correct AnswerverifiedShow Answer

The ability to see the scattering of light when passed through a colloid is known as

Correct AnswerverifiedD

Ionic compounds are generally insoluble in non-polar solvents.

Correct AnswerverifiedShow Answer

A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask, and then adding enough water to give a final volume of 200.0 mL. What is the molarity of the solution?

Correct AnswerverifiedShow Answer

There is a 12 M aqueous HCl solution in the stock room, but a 6 M solution is required for an experiment. Doubling the volume of a 12 M sample with water will produce a 6 M solution.

Correct AnswerverifiedTrue

When sodium acetate dissolves in water, the following reaction occurs. This solution could be used

Correct AnswerverifiedShow Answer

Dialysis and osmosis are used for the same purposes.

Correct AnswerverifiedShow Answer

A solution is made by dissolving 5.84 grams of NaCl in enough distilled water to give a final volume of 1.00 L. What is the molarity of the solution?

Correct AnswerverifiedShow Answer

Two solutions with concentrations of 2% sugar and 4% sugar, respectively, are separated by a semipermeable membrane. During osmosis, there is a net flow of

Correct AnswerverifiedShow Answer

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D

Iodine, I₂, is very slightly soluble in water, a polar solvent, but quite soluble in toluene, a nonpolar solvent. What can be inferred about the nature of the I₂ molecule?

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D

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A solution is prepared by adding 25.0 mL of 1.30 M AlCl₃ solution to a flask, and then adding enough water to give a final volume of 200.0 mL. What is the molarity of the solution?

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True

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