Question 1

Which of these compounds is a weak electrolyte?

Accepted Answer

A)   HCl
B)   NH3
C)   C6H12O6 (glucose) 
D)   N2
E)   KClF) D) and E)
G) All of the above

Question 2

________ ________ is the percentage of dissolved molecules that separate into ions in solution.

Accepted Answer

Percent di...

Question 3

Which of the following is not a colligative property?

Accepted Answer

A)   Vapor pressure lowering
B)   Atmospheric pressure
C)   Boiling point elevation
D)   Osmotic pressure
E)   Freezing point depressionF) A) and E)
G) A) and D)

Question 4

Which of the following states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the solution?

Accepted Answer

A)   Entropy
B)   Henry's law
C)   Dissolution
D)   Vapor pressure
E)   Enthalpy of solvationF) A) and B)
G) All of the above

Question 5

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 B)
G) C) and D)

Question 6

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Accepted Answer

A)   0.1 M K2SO4
B)   0.1 M CaCl2
C)   3.0 M LiF
D)   0.1 M MgSO4
E)   0.1 M NaClF) A) and E)
G) B) and D)

Question 7

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) C) and D)
G) A) and D)

Question 8

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

Accepted Answer

The pressure inside the flask will initially be the same as atmospheric pressure, and the gas present will be air with some ether vapor. Initially, the gas above the liquid will not be saturated with ether vapor. More liquid will evaporate until equilibrium is reached, leading to an increase in pressure.

Question 9

A solution of chloroform, CHCl3, and acetone, (CH3) 2CO, exhibits a negative deviation from Raoult's law. This result implies that

Accepted Answer

A)   chloroform-chloroform interactions are stronger than chloroform-acetone interactions.
B)   chloroform-acetone interactions are weaker than chloroform-chloroform interactions.
C)   acetone-acetone interactions are stronger than chloroform-acetone interactions.
D)   acetone-acetone interactions are weaker than chloroform-acetone interactions.E) A) and B)
F) None of the above

Question 10

Safrole was once used as a flavoring in root beer, until it was banned in 1960. What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile safrole in 950 g of ethanol (46.07 g/mol) ? P°ethanol = 50.0 torr at 25°C.

Accepted Answer

A)   1.8 torr
B)   11 torr
C)   15 torr
D)   40 torr
E)   48 torrF) B) and C)
G) C) and E) E

Question 11

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100. g of benzene by 0.47°C? (Kf of benzene is 5.12°C/m.)

Accepted Answer

A)   93 g/mol
B)   78 g/mol
C)   10.7 g/mol
D)   82 g/mol
E)   927 g/molF) B) and E)
G) All of the above

Question 12

Which compound is the most soluble in water?

Accepted Answer

A)   CH3CH2CH2CH2CH2OH
B)   CH3CH2CH2CH2OH
C)   CH3CH2CH2CH2CH2CH2CH2OH
D)   CH3CH2CH2OH
E)   All of these compounds are equally soluble in water.F) A) and C)
G) A) and B)

Question 13

A hydrophilic colloid must generally be stabilized.

Accepted Answer

A) True 
 B)False

Question 14

What is the name of the process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner?

Accepted Answer

solvation

Question 15

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water at 25ºC. At this temperature, the density of water is 0.997 g/mL.

Accepted Answer

A)   1.51%
B)   7.57%
C)   13.3%
D)   15.2%
E)   86.7%F) A) and D)
G) B) and D)

Question 16

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) All of the above
G) B) and D)

Question 17

________ is the term used for a water loving substance.

Accepted Answer

The answer of ________ is the term used for a...

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) None of the above
G) B) and D)

Question 19

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed?

Accepted Answer

A)   ΔHsoln > 0, entropy of system decreases
B)   ΔHsoln ≈ 0, entropy of system decreases
C)   ΔHsoln ≈ 0, entropy change of system ≈ 0
D)   ΔHsoln ≈ 0, entropy of system increases
E)   None of these choices is correct.F) C) and D)
G) A) and B)

Question 20

Which of these compounds is a nonelectrolyte?

Accepted Answer

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

Exam 13: Physical Properties of Solutions

Which of these compounds is a weak electrolyte?

Correct Answer
verified

is the percentage of dissolved molecules that separate into ions in solution.

Correct Answer
verified
Percent di...
View Answer

Which of the following is not a colligative property?

Correct Answer
verified

Which of the following states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the 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

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct Answer
verified

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

Correct Answer
verified

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

A solution of chloroform, CHCl₃, and acetone, (CH₃) ₂CO, exhibits a negative deviation from Raoult's law. This result implies that

Correct Answer
verified

Safrole was once used as a flavoring in root beer, until it was banned in 1960. What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile safrole in 950 g of ethanol (46.07 g/mol) ? P°_ethanol= 50.0 torr at 25°C.

Correct Answer
verified
E

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100. g of benzene by 0.47°C? (K_f of benzene is 5.12°C/m.)

Correct Answer
verified

Which compound is the most soluble in water?

Correct Answer
verified

A hydrophilic colloid must generally be stabilized.

Correct Answer
verified

What is the name of the process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner?

Correct Answer
verified
solvation

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water at 25ºC. At this temperature, the density of water is 0.997 g/mL.

Correct Answer
verified

If a solute dissolves in an endothermic process

Correct Answer
verified

________ is the term used for a water loving substance.

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

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed?

Correct Answer
verified

Which of these compounds is a nonelectrolyte?

Correct Answer
verified

Exam 13: Physical Properties of Solutions

Which of these compounds is a weak electrolyte?

Correct AnswerverifiedShow Answer

________ ________ is the percentage of dissolved molecules that separate into ions in solution.

Correct AnswerverifiedPercent di...View AnswerShow Answer

Which of the following is not a colligative property?

Correct AnswerverifiedShow Answer

Which of the following states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the 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

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If a 100-mL sample of a volatile liquid such as diethyl ether is introduced into a 250-mL flask which is immediately sealed, the pressure inside will increase above atmospheric pressure. Explain.

A solution of chloroform, CHCl3, and acetone, (CH3) 2CO, exhibits a negative deviation from Raoult's law. This result implies that

Correct AnswerverifiedShow Answer

Safrole was once used as a flavoring in root beer, until it was banned in 1960. What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile safrole in 950 g of ethanol (46.07 g/mol) ? P°ethanol = 50.0 torr at 25°C.

Correct AnswerverifiedE

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100. g of benzene by 0.47°C? (Kf of benzene is 5.12°C/m.)

Correct AnswerverifiedShow Answer

Which compound is the most soluble in water?

Correct AnswerverifiedShow Answer

A hydrophilic colloid must generally be stabilized.

Correct AnswerverifiedShow Answer

What is the name of the process in which an ion or a molecule is surrounded by solvent molecules arranged in a specific manner?

Correct Answerverifiedsolvation

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water at 25ºC. At this temperature, the density of water is 0.997 g/mL.

Correct AnswerverifiedShow Answer

If a solute dissolves in an endothermic process

Correct AnswerverifiedShow Answer

________ is the term used for a water loving substance.

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

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed?

Correct AnswerverifiedShow Answer

Which of these compounds is a nonelectrolyte?

Correct AnswerverifiedShow Answer

Correct Answer
verified

is the percentage of dissolved molecules that separate into ions in solution.

Correct Answer
verified
Percent di...
View Answer

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

A solution of chloroform, CHCl₃, and acetone, (CH₃) ₂CO, exhibits a negative deviation from Raoult's law. This result implies that

Correct Answer
verified

Safrole was once used as a flavoring in root beer, until it was banned in 1960. What is the vapor pressure of a solution prepared by dissolving 0.75 mol of nonvolatile safrole in 950 g of ethanol (46.07 g/mol) ? P°_ethanol= 50.0 torr at 25°C.

Correct Answer
verified
E

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100. g of benzene by 0.47°C? (K_f of benzene is 5.12°C/m.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
solvation

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water at 25ºC. At this temperature, the density of water is 0.997 g/mL.

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified