Question 1

A 0.100 m MgSO4 solution has a freezing point of -0.23°C. What is the van't Hoff factor for this solution? Kf = 1.86°C/m

Accepted Answer

A)   0.62
B)   1.0
C)   1.2
D)   2.0
E)   4.0F) A) and E)
G) A) and D)

Question 2

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Accepted Answer

A) True 
 B)False

Question 3

Procaine hydrochloride (  = 272.77 g/mol)  is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which has a density of 1.1066 g/mL.

Accepted Answer

A)   2.272 M
B)   4.056 M
C)   4.216 M
D)   4.666 M
E)   none of the aboveF) C) and D)
G) A) and B)

Question 4

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

Accepted Answer

A)   0.75 m (NH4) 3PO4
B)   1.0 m CaSO4
C)   1.0 m LiClO4
D)   1.5 m CH3OH, methyl alcohol
E)   pure waterF) All of the above
G) None of the above A

Question 5

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) A) and D)
G) A) and B)

Question 6

The solubility of gases in water increases with increase in the pressure of the gas.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following pairs of ions is arranged so that the ion with the larger (i.e., more negative)  heat of hydration is listed first?

Accepted Answer

A)   Br-, K+
B)   Mg2+, Sr 2+
C)   Ca2+, Sc3+
D)   Na+, Li+
E)   None of the above are arranged in this way.F) B) and C)
G) D) and E)

Question 8

What concentration of aqueous FeCl3 would have the same osmotic pressure as a 0.20 M solution of CaCl2 at the same temperature, assuming ideal behavior?

Accepted Answer

A)   0.60 M
B)   0.40 M
C)   0.30 M
D)   0.15 M
E)   0.10 MF) A) and C)
G) B) and E) D

Question 9

In general, water is a good solvent for both polar and non-polar compounds.

Accepted Answer

A) True 
 B)False

Question 10

Cinnamaldehyde ( b = 1.22°C/m, boiling point of pure ethanol = 78.5°C A)  62.4 g B)  67.8 g C)  76.2 g D)  78.5 g E)  79.6 g" class="answers-bank-image d-inline" rel="preload" > = 132.15 g/mol)  is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7°C? Kb = 1.22°C/m, boiling point of pure ethanol = 78.5°C

Accepted Answer

A)   62.4 g
B)   67.8 g
C)   76.2 g
D)   78.5 g
E)   79.6 gF) A) and D)
G) C) and E)

Question 11

The most abundant molecules in the cell membranes of most species are

Accepted Answer

A)   proteins.
B)   sugars.
C)   phospholipids.
D)   fatty acids.
E)   steroids.F) B) and D)
G) B) and C)

Question 12

Saccharin, one of the first non-nutritive sweeteners used in soft-drinks, is 500 times sweeter than sugar in dilute aqueous solutions. The solubility of saccharin is 1.00 gram per 290 mL of solution. What is the molarity of a saturated saccharin solution? ( saccharin = 183.2 g/mol)  A)  0.0188 M B)  0.632 M C)  1.58 M D)  3.45 M E)  none of the above" class="answers-bank-image d-inline" rel="preload" > saccharin = 183.2 g/mol)

Accepted Answer

A)   0.0188 M
B)   0.632 M
C)   1.58 M
D)   3.45 M
E)   none of the aboveF) C) and D)
G) B) and D) A

Question 13

Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules.

Accepted Answer

A)   dipole-dipole
B)   dipole-induced dipole
C)   ion-dipole
D)   ion-induced dipole
E)   ion-hydrogen bondF) A) and D)
G) A) and C)

Question 14

A 0.89% (w/v)  sodium chloride solution is referred to as physiological saline solution because it has the same concentration of salts as human blood. What is the molarity of a physiological saline solution?

Accepted Answer

A)   0.0028 M
B)   0.015 M
C)   0.15 M
D)   0.30 M
E)   0.35 MF) A) and B)
G) A) and C)

Question 15

Two aqueous are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?

Accepted Answer

A)   The Na2CO3 solution has a higher osmotic pressure and higher vapor pressure than the LiCl solution.
B)   The Na2CO3 solution has a higher osmotic pressure and higher boiling point than the LiCl solution.
C)   The Na2CO3 solution has a lower osmotic pressure and lower vapor pressure than the LiCI solution.
D)   The Na2CO3 solution has a lower osmotic pressure and higher boiling point than the LiCl solution.
E)   None of the above statements is true.F) A) and B)
G) A) and C)

Question 16

Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane ( hexane = 400.0 torr at 49.6°C. A)  54 torr B)  154 torr C)  246 torr D)  346 torr E)  400. torr" class="answers-bank-image d-inline" rel="preload" > = 86.18 g/mol)  at 49.6°C. P°hexane = 400.0 torr at 49.6°C.

Accepted Answer

A)   54 torr
B)   154 torr
C)   246 torr
D)   346 torr
E)   400. torrF) A) and E)
G) B) and D)

Question 17

Select the strongest electrolyte from the following set.

Accepted Answer

A)   CH3CH2OH, ethanol
B)   LiNO3
C)   C6H12O6, glucose
D)   CCl4
E)   HFF) None of the above
G) A) and B)

Question 18

Carbon tetrachloride, once widely used in fire extinguishers and as a dry cleaning fluid, has been found to cause liver damage to those exposed to its vapors over long periods of time. What is the boiling point of a solution prepared by dissolving 375 g of sulfur (S8, 8,   = 256.5 g/mol)  in 1250 g of CCl4? Kb = 5.05°C/m, boiling point of pure CCl4 = 76.7°C? A)  70.8°C B)  75.2°C C)  78.2°C D)  82.6°C E)  >85°C" class="answers-bank-image d-inline" rel="preload" > = 256.5 g/mol)  in 1250 g of CCl4? Kb = 5.05°C/m, boiling point of pure CCl4 = 76.7°C?

Accepted Answer

A)   70.8°C
B)   75.2°C
C)   78.2°C
D)   82.6°C
E)   >85°CF) A) and B)
G) A) and C)

Question 19

A solution of ethanol (C2H6O)  in water is sometimes used as a disinfectant. 1.00 L of this solution contains 553 g of ethanol and 335 g of water. What is the molality of the ethanol in this solution?

Accepted Answer

A)   0.392 m
B)   0.608 m
C)   13.5 m
D)   33.6 m
E)   35.8 mF) B) and E)
G) B) and D)

Question 20

Ideal solutions do not conform to Raoult's Law.

Accepted Answer

A) True 
 B)False

Exam 13: The Properties of Mixtures: Solutions and Colloids

A 0.100 m MgSO₄solution has a freezing point of -0.23°C. What is the van't Hoff factor for this solution? K_f = 1.86°C/m

Correct Answer
verified

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Correct Answer
verified

Procaine hydrochloride ( = 272.77 g/mol) is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which has a density of 1.1066 g/mL.

Correct Answer
verified

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

Correct Answer
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A

An emulsion is a dispersion consisting of a

Correct Answer
verified

The solubility of gases in water increases with increase in the pressure of the gas.

Correct Answer
verified

Which of the following pairs of ions is arranged so that the ion with the larger (i.e., more negative) heat of hydration is listed first?

Correct Answer
verified

What concentration of aqueous FeCl₃ would have the same osmotic pressure as a 0.20 M solution of CaCl₂ at the same temperature, assuming ideal behavior?

Correct Answer
verified
D

In general, water is a good solvent for both polar and non-polar compounds.

Correct Answer
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Cinnamaldehyde ( = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7°C? K_b = 1.22°C/m, boiling point of pure ethanol = 78.5°C

Correct Answer
verified

The most abundant molecules in the cell membranes of most species are

Correct Answer
verified

Saccharin, one of the first non-nutritive sweeteners used in soft-drinks, is 500 times sweeter than sugar in dilute aqueous solutions. The solubility of saccharin is 1.00 gram per 290 mL of solution. What is the molarity of a saturated saccharin solution? ( _saccharin = 183.2 g/mol)

Correct Answer
verified
A

Select the type of interaction which best describes the attraction between Mg²⁺ions and water molecules.

Correct Answer
verified

A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the same concentration of salts as human blood. What is the molarity of a physiological saline solution?

Correct Answer
verified

Two aqueous are prepared: 1.00 m Na₂CO₃and 1.00 m LiCl. Which of the following statements is true?

Correct Answer
verified

Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane ( = 86.18 g/mol) at 49.6°C. P°_hexane = 400.0 torr at 49.6°C.

Correct Answer
verified

Select the strongest electrolyte from the following set.

Correct Answer
verified

Correct Answer
verified

A solution of ethanol (C₂H₆O) in water is sometimes used as a disinfectant. 1.00 L of this solution contains 553 g of ethanol and 335 g of water. What is the molality of the ethanol in this solution?

Correct Answer
verified

Ideal solutions do not conform to Raoult's Law.

Correct Answer
verified

Exam 13: The Properties of Mixtures: Solutions and Colloids

A 0.100 m MgSO4 solution has a freezing point of -0.23°C. What is the van't Hoff factor for this solution? Kf = 1.86°C/m

Correct AnswerverifiedShow Answer

Electrolyte solutions generally behave less ideally as the solute concentration increases.

Correct AnswerverifiedShow Answer

Procaine hydrochloride ( = 272.77 g/mol) is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which has a density of 1.1066 g/mL.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

An emulsion is a dispersion consisting of a

Correct AnswerverifiedShow Answer

The solubility of gases in water increases with increase in the pressure of the gas.

Correct AnswerverifiedShow Answer

Which of the following pairs of ions is arranged so that the ion with the larger (i.e., more negative) heat of hydration is listed first?

Correct AnswerverifiedShow Answer

What concentration of aqueous FeCl3 would have the same osmotic pressure as a 0.20 M solution of CaCl2 at the same temperature, assuming ideal behavior?

Correct AnswerverifiedD

In general, water is a good solvent for both polar and non-polar compounds.

Correct AnswerverifiedShow Answer

Cinnamaldehyde ( = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7°C? Kb = 1.22°C/m, boiling point of pure ethanol = 78.5°C

Correct AnswerverifiedShow Answer

The most abundant molecules in the cell membranes of most species are

Correct AnswerverifiedShow Answer

Saccharin, one of the first non-nutritive sweeteners used in soft-drinks, is 500 times sweeter than sugar in dilute aqueous solutions. The solubility of saccharin is 1.00 gram per 290 mL of solution. What is the molarity of a saturated saccharin solution? ( saccharin = 183.2 g/mol)

Correct AnswerverifiedA

Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules.

Correct AnswerverifiedShow Answer

A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the same concentration of salts as human blood. What is the molarity of a physiological saline solution?

Correct AnswerverifiedShow Answer

Two aqueous are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?

Correct AnswerverifiedShow Answer

Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane ( = 86.18 g/mol) at 49.6°C. P°hexane = 400.0 torr at 49.6°C.

Correct AnswerverifiedShow Answer

Select the strongest electrolyte from the following set.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A solution of ethanol (C2H6O) in water is sometimes used as a disinfectant. 1.00 L of this solution contains 553 g of ethanol and 335 g of water. What is the molality of the ethanol in this solution?

Correct AnswerverifiedShow Answer

Ideal solutions do not conform to Raoult's Law.

Correct AnswerverifiedShow Answer

A 0.100 m MgSO₄solution has a freezing point of -0.23°C. What is the van't Hoff factor for this solution? K_f = 1.86°C/m

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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A

Correct Answer
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Correct Answer
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Correct Answer
verified

What concentration of aqueous FeCl₃ would have the same osmotic pressure as a 0.20 M solution of CaCl₂ at the same temperature, assuming ideal behavior?

Correct Answer
verified
D

Correct Answer
verified

Cinnamaldehyde ( = 132.15 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.7°C? K_b = 1.22°C/m, boiling point of pure ethanol = 78.5°C

Correct Answer
verified

Correct Answer
verified

Saccharin, one of the first non-nutritive sweeteners used in soft-drinks, is 500 times sweeter than sugar in dilute aqueous solutions. The solubility of saccharin is 1.00 gram per 290 mL of solution. What is the molarity of a saturated saccharin solution? ( _saccharin = 183.2 g/mol)

Correct Answer
verified
A

Select the type of interaction which best describes the attraction between Mg²⁺ions and water molecules.

Correct Answer
verified

Correct Answer
verified

Two aqueous are prepared: 1.00 m Na₂CO₃and 1.00 m LiCl. Which of the following statements is true?

Correct Answer
verified

Calculate the vapor pressure of a solution prepared by dissolving 0.500 mol of a non-volatile solute in 275 g of hexane ( = 86.18 g/mol) at 49.6°C. P°_hexane = 400.0 torr at 49.6°C.

Correct Answer
verified

Correct Answer
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Correct Answer
verified

A solution of ethanol (C₂H₆O) in water is sometimes used as a disinfectant. 1.00 L of this solution contains 553 g of ethanol and 335 g of water. What is the molality of the ethanol in this solution?

Correct Answer
verified

Correct Answer
verified