Question 1

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. (For water, Kf = 1.86°C/m)

Accepted Answer

A)   3.3°C
B)   1.1°C
C)   0.0°C
D)   -1.1°C
E)   -3.3°CF) A) and E)
G) C) and D)

Question 2

A(n) ________ ________ is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

Accepted Answer

semipermea...

Question 3

At 10°C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure. What is the Henry's law constant of Cl2 in water? (R = 0.0821 atm • L • mol-1• K-1 )

Accepted Answer

A)   3.8 mol • L-1• atm-1
B)   0.043 mol • L-1• atm-1
C)   36 mol • L-1• atm-1
D)   3.1 mol • L-1• atm-1
E)   0.13 mol • L-1• atm-1F) B) and E)
G) B) and C)

Question 4

An "ideal solution" is a solution that obeys Raoult's law.

Accepted Answer

A) True 
 B)False

Question 5

What is the molarity of a solution of 10.0% by mass cadmium sulfate, CdSO4 (208.47 g/mol) ? The density of the solution is 1.10 g/mL.

Accepted Answer

A)   0.528 M
B)   0.436 M
C)   0.479 M
D)   0.100 M
E)   1.89 MF) B) and D)
G) A) and B)

Question 6

The mixing of solvent molecules and solute molecules is usually described as

Accepted Answer

A)   the separation energy.
B)   the heat of solvation.
C)   an endothermic process.
D)   an exothermic process.
E)   the heat of solution.F) A) and D)
G) C) and D)

Question 7

Which response lists all the following pairs that are miscible liquids? I. octane (C8H18)  and water
II)  acetic acid (CH3COOH)  and water
III)  octane (C8H18)  and carbon tetrachloride (CCl4)

Accepted Answer

A)   I and III
B)   I and II
C)   III only
D)   II only
E)   II and IIIF) D) and E)
G) B) and E)

Question 8

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 D)
G) B) and E)

Question 9

In the following diagrams, the black circles represent a solute in solution. Which diagram represents a saturated solution?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) None of the above
G) B) and D)

Question 10

Below is a diagram representing a gas G in equilibrium, above a sample of water and dissolved in the water.  If the pressure of the gas G is doubled, which diagram below best represents how the system will respond?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) B) and E)

Question 11

An emulsion is a dispersion consisting of a

Accepted Answer

A)   solid in a liquid.
B)   liquid in a liquid.
C)   gas in a liquid.
D)   liquid in a solid.
E)   gas in a solid.F) None of the above
G) A) and B)

Question 12

Which one of the following substances is the strongest electrolyte?

Accepted Answer

A)   CO
B)   CH3Cl
C)   CH4
D)   C2H5OH
E)   HClF) C) and E)
G) A) and D)

Question 13

Osmosis is the selective passage of solvent molecules through a porous membrane from a more concentrated solution to a more dilute one.

Accepted Answer

A) True 
 B)False

Question 14

Potassium fluoride is used for frosting glass. Calculate the molarity of a solution prepared by dissolving 78.6 g of KF in enough water to produce 225 mL of solution.

Accepted Answer

A)   0.304 M
B)   0.349 M
C)   1.35 M
D)   3.29 M
E)   6.01 MF) None of the above
G) A) and D)

Question 15

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 16

What mass of ethanol (C2H5OH) , a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. (Kf of water is 1.86°C/m.)

Accepted Answer

A)   85.7 kg
B)   24.8 kg
C)   5.38 kg
D)   2.48 kg
E)   1.17 kgF) B) and C)
G) A) and D)

Question 17

What mass of LiOH is required to prepare 0.250 L of a 3.55 M solution?

Accepted Answer

A)   0.0371 g
B)   0.888 g
C)   21.3 g
D)   250. g
E)   340. gF) None of the above
G) C) and E)

Question 18

Hydrophilic and hydrophobic are not exactly the opposite phenomenon.

Accepted Answer

A) True 
 B)False

Question 19

What is the molality of a solution prepared by dissolving 84.7 g of KMnO4 in 165 g of water?

Accepted Answer

A)   0.339 m
B)   0.513 m
C)   0.536 m
D)   3.25 m
E)   81.1 mF) C) and D)
G) A) and C)

Question 20

What relationship states that the partial pressure of a solvent over a solution is given by the vapor pressure of the pure solvent times the mole fraction of the solvent in the solution?

Accepted Answer

A)   Henry's law
B)   Law of partial pressures
C)   Curie's law
D)   Raoult's law
E)   Vapor pressureF) C) and D)
G) B) and E)

Exam 13: Physical Properties of Solutions

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

Which response lists all the following pairs that are miscible liquids? I. octane (C8H18) and water II) acetic acid (CH3COOH) and water III) octane (C8H18) and carbon tetrachloride (CCl4)

Correct AnswerverifiedShow Answer

Hydrophilic and hydrophobic are not exactly the opposite phenomenon.

Correct AnswerverifiedShow Answer

What is the molarity of a solution of 10.0% by mass cadmium sulfate, CdSO4 (208.47 g/mol) ? The density of the solution is 1.10 g/mL.

Correct AnswerverifiedShow Answer

What mass of LiOH is required to prepare 0.250 L of a 3.55 M solution?

Correct AnswerverifiedShow Answer

An "ideal solution" is a solution that obeys Raoult's law.

Correct AnswerverifiedShow Answer

A(n) ________ ________ is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

Correct Answerverifiedsemipermea...View AnswerShow Answer

What relationship states that the partial pressure of a solvent over a solution is given by the vapor pressure of the pure solvent times the mole fraction of the solvent in the solution?

Correct AnswerverifiedShow Answer

Below is a diagram representing a gas G in equilibrium, above a sample of water and dissolved in the water. If the pressure of the gas G is doubled, which diagram below best represents how the system will respond?

Correct AnswerverifiedShow Answer

What mass of ethanol (C2H5OH) , a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. (Kf of water is 1.86°C/m.)

Correct AnswerverifiedShow Answer

Osmosis is the selective passage of solvent molecules through a porous membrane from a more concentrated solution to a more dilute one.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Potassium fluoride is used for frosting glass. Calculate the molarity of a solution prepared by dissolving 78.6 g of KF in enough water to produce 225 mL of solution.

Correct AnswerverifiedShow Answer

Which one of the following substances is the strongest electrolyte?

Correct AnswerverifiedShow Answer

At 10°C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure. What is the Henry's law constant of Cl2 in water? (R = 0.0821 atm • L • mol-1• K-1 )

Correct AnswerverifiedShow Answer

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. (For water, Kf = 1.86°C/m)

Correct AnswerverifiedShow Answer

The mixing of solvent molecules and solute molecules is usually described as

Correct AnswerverifiedShow Answer

What is the molality of a solution prepared by dissolving 84.7 g of KMnO4 in 165 g of water?

Correct AnswerverifiedShow Answer

In the following diagrams, the black circles represent a solute in solution. Which diagram represents a saturated solution?

Correct AnswerverifiedShow Answer

An emulsion is a dispersion consisting of a

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 Answer
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Which response lists all the following pairs that are miscible liquids? I. octane (C₈H₁₈) and water II) acetic acid (CH₃COOH) and water III) octane (C₈H₁₈) and carbon tetrachloride (CCl₄)

Correct Answer
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Correct Answer
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What is the molarity of a solution of 10.0% by mass cadmium sulfate, CdSO₄ (208.47 g/mol) ? The density of the solution is 1.10 g/mL.

Correct Answer
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Correct Answer
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Correct Answer
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A(n) is the name given to the material which allows the passage of solvent molecules but blocks the passage of solute molecules.

Correct Answer
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semipermea...
View Answer

Correct Answer
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Correct Answer
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What mass of ethanol (C₂H₅OH) , a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. (K_f of water is 1.86°C/m.)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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At 10°C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure. What is the Henry's law constant of Cl₂ in water? (R = 0.0821 atm • L • mol^-1•K^-1 )

Correct Answer
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Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. (For water, K_f = 1.86°C/m)

Correct Answer
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Correct Answer
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What is the molality of a solution prepared by dissolving 84.7 g of KMnO₄ in 165 g of water?

Correct Answer
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Correct Answer
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Correct Answer
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