Question 1

Which combination of a 36.0% (w/w) stock solution of acetic acid (d = 1.045 g/mL) and water will result in 1.00 kg of a 15.0% (w/w) acetic acid solution?

Accepted Answer

A)  417 mL of 36% acetic acid in 583 mL of distilled water
B)  417 g of 36% acetic acid in 583 g of distilled water
C)  360 mL of 36% acetic acid in 640 mL of distilled water
D)  360 g of 36% acetic acid in 640 g of distilled water
E)  150 g of 36% acetic acid in 850 g of distilled waterF) A) and B)
G) B) and C)

Question 2

Which accurately characterizes all nonelectrolyte solutions?

Accepted Answer

A)  Nonelectrolyte solutions contain molecules.
B)  Nonelectrolyte solutions conduct electricity.
C)  Nonelectrolyte solutions react with other solutions.
D)  Nonelectrolyte solutions do not conduct electricity.
E)  Nonelectrolyte solutions conduct heat.F) A) and B)
G) C) and D)

Question 3

What term describes the process when two liquids are completely soluble in each other in all proportions?

Accepted Answer

A)  Solvation
B)  Miscible
C)  Unsaturated
D)  Saturated
E)  OversaturatedF) A) and E)
G) A) and B)

Question 4

Diethyl ether has a vapor pressure of 400.0 torr at 18°C.When a sample of benzoic acid is dissolved in ether,the vapor pressure of the solution is 342 torr.What is the mole fraction of benzoic acid in the solution?

Accepted Answer

A)  0.0169
B)  0.0197
C)  0.145
D)  0.855
E)  0.045F) C) and E)
G) A) and E)

Question 5

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO4) in this solution?

Accepted Answer

A)  0.0080
B)  0.0086
C)  0.066
D)  0.071
E)  0.48F) C) and E)
G) B) and E)

Question 6

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Accepted Answer

A)  19.6 g
B)  17.2 g
C)  40.7 g
D)  50.9 g
E)  157 gF) B) and D)
G) B) and E)

Question 7

Which of these compounds is a nonelectrolyte?

Accepted Answer

A)  NaOH
B)  HNO3
C)  C2H6O (ethanol) 
D)  KF
E)  CH3COOH (acetic acid) F) C) and D)
G) A) and B)

Question 8

Which is the correct description of a solution?

Accepted Answer

A)  A solution is a heterogeneous mixture of two or more substances.
B)  A solution is a homogeneous mixture of two or more substances.
C)  A solution may be a gas,solid,or liquid.
D)  A solution is any mixture of two or more substances.
E)  Both the choices are correctF) A) and C)
G) B) and E)

Question 9

What is defined as a solution that has a lower concentration of dissolved substances than plasma?

Accepted Answer

A)  Hypotonic
B)  Hypertonic
C)  Aplasmic
D)  Plasmic
E)  ColloidalF) B) and C)
G) A) and C)

Question 10

What is the name of a solution that obeys Raoult's law?

Accepted Answer

A)  Ideal solution
B)  Nonideal solution
C)  Suspension
D)  Solute
E)  SolventF) A) and D)
G) B) and E)

Question 11

If a solute dissolves in an endothermic process

Accepted Answer

A)  hydrogen bonds must exist between solvent and solute.
B)  strong ion-dipole forces must exist in the solution.
C)  the solute must be a gas.
D)  the entropy of the solution is immaterial.
E)  the entropy of the solution must be greater than that of its pure components.F) C) and E)
G) A) and B)

Question 12

The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the aqueous solubility of atmospheric O2 is 2.67 × 10-4 M at sea level and 25°C,what is the solubility of O2 at an elevation of 12,000 ft where the total pressure is 0.657 atm? Assume the temperature is 25°C,and that the mole fraction of O2 in air is 0.209
At both 12,000 ft and at sea level.

Accepted Answer

A)  1.75 × 10-4 M
B)  2.67 × 10-4 M
C)  3.66 × 10-5 M
D)  4.06 × 10-4 M
E)  5.58 × 10-5 MF) All of the above
G) A) and D)

Question 13

When a nonvolatile solute is dissolved in a liquid,the vapor pressure exerted by the liquid decreases.

Accepted Answer

A) True 
 B)False

Question 14

Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

Accepted Answer

A)  electrolysis
B)  dissociation
C)  division
D)  ionization
E)  decompositionF) A) and B)
G) A) and D)

Question 15

Sodium hydroxide is a common ingredient in drain cleaners such as Drano.The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310.What is the molality of the solution?

Accepted Answer

A)  0.310 m
B)  0.690 m
C)  1.24 m
D)  12.4 m
E)  24.9 mF) A) and E)
G) None of the above

Question 16

The solubility of gases in water ___________ (increases or decreases)as the temperature increases.

Accepted Answer

The answer of The solubility of gases in water ___________...

Question 17

Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution?

Accepted Answer

A)  0.017
B)  0.023
C)  0.012
D)  0.24
E)  0.29F) B) and C)
G) A) and E)

Question 18

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

Accepted Answer

A)  0.20 L
B)  0.57 L
C)  1.8 L
D)  3.6 L
E)  5.1 LF) A) and B)
G) D) and E)

Question 19

From the following list of aqueous solutions and water,select the one with the highest freezing point.

Accepted Answer

A)  1.0 M KNO3
B)  0.75 M NaCl
C)  0.75 M CuCl2
D)  2.0 M C12H22O11 (sucrose) 
E)  2.0 M KNO3F) A) and B)
G) A) and E)

Question 20

______ is the value for i,the van't Hoff factor,for all nonelectrolytes.

Accepted Answer

The answer of ______ is the value for i,the van't...

Exam 13: Physical Properties of Solutions

What is the name of a solution that obeys Raoult's law?

Correct Answer
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______ is the value for i,the van't Hoff factor,for all nonelectrolytes.

Correct Answer
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When a nonvolatile solute is dissolved in a liquid,the vapor pressure exerted by the liquid decreases.

Correct Answer
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Which accurately characterizes all nonelectrolyte solutions?

Correct Answer
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The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO₄) in this solution?

Correct Answer
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The solubility of gases in water ___________ (increases or decreases)as the temperature increases.

Correct Answer
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Diethyl ether has a vapor pressure of 400.0 torr at 18°C.When a sample of benzoic acid is dissolved in ether,the vapor pressure of the solution is 342 torr.What is the mole fraction of benzoic acid in the solution?

Correct Answer
verified

Which is the correct description of a solution?

Correct Answer
verified

Sodium hydroxide is a common ingredient in drain cleaners such as Drano.The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310.What is the molality of the solution?

Correct Answer
verified

What term describes the process when two liquids are completely soluble in each other in all proportions?

Correct Answer
verified

Which combination of a 36.0% (w/w) stock solution of acetic acid (d = 1.045 g/mL) and water will result in 1.00 kg of a 15.0% (w/w) acetic acid solution?

Correct Answer
verified

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,K_b = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Correct Answer
verified

If a solute dissolves in an endothermic process

Correct Answer
verified

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H₃PO₄?

Correct Answer
verified

From the following list of aqueous solutions and water,select the one with the highest freezing point.

Correct Answer
verified

Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution?

Correct Answer
verified

What is defined as a solution that has a lower concentration of dissolved substances than plasma?

Correct Answer
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Correct Answer
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Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

Correct Answer
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Which of these compounds is a nonelectrolyte?

Correct Answer
verified

Exam 13: Physical Properties of Solutions

What is the name of a solution that obeys Raoult's law?

Correct AnswerverifiedShow Answer

______ is the value for i,the van't Hoff factor,for all nonelectrolytes.

Correct AnswerverifiedShow Answer

When a nonvolatile solute is dissolved in a liquid,the vapor pressure exerted by the liquid decreases.

Correct AnswerverifiedShow Answer

Which accurately characterizes all nonelectrolyte solutions?

Correct AnswerverifiedShow Answer

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO4) in this solution?

Correct AnswerverifiedShow Answer

The solubility of gases in water ___________ (increases or decreases)as the temperature increases.

Correct AnswerverifiedShow Answer

Diethyl ether has a vapor pressure of 400.0 torr at 18°C.When a sample of benzoic acid is dissolved in ether,the vapor pressure of the solution is 342 torr.What is the mole fraction of benzoic acid in the solution?

Correct AnswerverifiedShow Answer

Which is the correct description of a solution?

Correct AnswerverifiedShow Answer

Sodium hydroxide is a common ingredient in drain cleaners such as Drano.The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310.What is the molality of the solution?

Correct AnswerverifiedShow Answer

What term describes the process when two liquids are completely soluble in each other in all proportions?

Correct AnswerverifiedShow Answer

Which combination of a 36.0% (w/w) stock solution of acetic acid (d = 1.045 g/mL) and water will result in 1.00 kg of a 15.0% (w/w) acetic acid solution?

Correct AnswerverifiedShow Answer

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Correct AnswerverifiedShow Answer

If a solute dissolves in an endothermic process

Correct AnswerverifiedShow Answer

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

Correct AnswerverifiedShow Answer

From the following list of aqueous solutions and water,select the one with the highest freezing point.

Correct AnswerverifiedShow Answer

Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution?

Correct AnswerverifiedShow Answer

What is defined as a solution that has a lower concentration of dissolved substances than plasma?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

Correct AnswerverifiedShow Answer

Which of these compounds is a nonelectrolyte?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25°C.What is the mole fraction of potassium permanganate (KMnO₄) in this solution?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene (406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? (For chloroform,K_b = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Correct Answer
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Correct Answer
verified

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H₃PO₄?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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