Question 1

The solubility of CO2 gas in water

Accepted Answer

A)  increases with increasing gas pressure.
B)  increases with decreasing gas pressure.
C)  decreases with increasing gas pressure.
D)  is not dependent on pressure.E) A) and C)
F) All of the above

Question 2

What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091 g/mL?

Accepted Answer

A)  3.87 * 10-4 %
B)  3.87 * 10-1 %
C)  11.0 %
D)  1.10 %
E)  6.50 * 10-2  %F) A) and D)
G) A) and C)

Question 3

What is the osmotic pressure of a solution prepared from 13.7 g of the electrolyte HCl and enough water to make 0.500 L of solution at 18°C?

Accepted Answer

A)  0.55 atm
B)  1.10 atm
C)  8.95 atm
D)  17.9 atm
E)  35.9 atmF) B) and C)
G) D) and E)

Question 4

The density of a 20.3 M CH3OH (methanol) solution is 0.858 g/mL. What is the molality of this solution? H2O is the solvent.

Accepted Answer

A)  17.4 m
B)  20.8 m
C)  23.7 m
D)  70.0 m
E)  97.6 mF) A) and B)
G) A) and C)

Question 5

What volume of water should be added to 600. mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol, Kb = 1.22 °C/m, density = 0.789 g/cm3, boiling point = 78.4°C)

Accepted Answer

A)  186 mL
B)  245 mL
C)  518 mL
D)  116 mL
E)  322 mLF) A) and B)
G) A) and C)

Question 6

Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g) in water at 25°C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10-3 mol/L·atm.

Accepted Answer

A)  2.7 * 10-4 M
B)  1.3 * 10-3 M
C)  6.2 * 10-3 M
D)  9.6 * 10-3 M
E)  0.96 MF) B) and D)
G) None of the above

Question 7

Which of the following aqueous solutions has the highest osmotic pressure at 25°C?

Accepted Answer

A)  0.2 M KBr
B)  0.2 M ethanol
C)  0.2 M Na2SO4
D)  0.2 M KClE) A) and B)
F) All of the above

Question 8

Which of the following aqueous solutions has the highest boiling point? Kb for water is 0.52°C/m.

Accepted Answer

A)  0.2 m KCl
B)  0.2 m Na2SO4
C)  0.2 m Ca(NO3) 2
D)  A and B.
E)  B and C.F) A) and D)
G) A) and E)

Question 9

Which of the following gives the molarity of a 17.0 % by mass solution of sodium acetate, CH3COONa (molar mass = 82.0 g/mol) in water? The density of the solution is 1.09 g/mL.

Accepted Answer

A)  2.26 * 10 - 6 M
B)  0.207 M
C)  2.07 M
D)  2.26 M
E)  2.72 MF) A) and B)
G) B) and D) D

Question 10

A 100.-mL sample of water is taken from the Pacific Ocean, and the water is allowed to evaporate. The salts that remain (mostly NaCl)have a mass of 3.85 g. Calculate the original concentration of NaCl, in g per liter, in the water sample.

Accepted Answer

38.5 g/L

Question 11

The term "proof" is defined as twice the percent by volume of pure ethanol in solution. A solution that is 95% ethanol is 190 proof. What is the molarity of ethanol in a 92-proof ethanol/water solution? (Given: density of ethanol = 0.80 g/cm3; density of water = 1.0 g/cm3)

Accepted Answer

Question 12

What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6) in 100. g of H2O? Kf for water is 1.86°C/m.

Accepted Answer

A)  -0.186°C
B)  +0.186°C
C)  -0.10°C
D)  +0.10°C
E)  -1.03°CF) A) and C)
G) B) and C)

Question 13

The solubility of CO2 gas in water

Accepted Answer

A)  increases with increasing temperature.
B)  decreases with decreasing temperature.
C)  decreases with increasing temperature.
D)  is not dependent on temperature.E) All of the above
F) B) and C)

Question 14

What is the molality of a solution that is 3.68 % by mass calcium chloride?

Accepted Answer

A)  0.0332 m
B)  0.332 m
C)  0.344 m
D)  0.464 m
E)  0.506 mF) A) and E)
G) B) and E) C

Question 15

Which one of the following would be immiscible with water?

Accepted Answer

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

Question 16

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation, winter or summer. Why should you not use ordinary water during the summer?

Accepted Answer

The antifreeze will lower the vapor pres...

Question 17

What is the osmotic pressure of a 0.25 M solution of sucrose at 37°C? (R = 0.0821 L.atm/K.mol)

Accepted Answer

A)  6.6 * 10-5 atm
B)  0.76 atm
C)  6.4 atm
D)  100 atm
E)  940 atmF) None of the above
G) B) and E)

Question 18

A 9.50 % by mass solution of acetone (C3H6O) in water has a density of 0.9849 g/mL at 20°C. What is the molarity of this solution?

Accepted Answer

A)  0.621 M
B)  1.61 M
C)  1.66 M
D)  1.71 M
E)  16.9 MF) C) and D)
G) D) and E)

Question 19

Calculate the molality of a 20.0% by mass ammonium sulfate (NH4) 2SO4 solution. The density of the solution is 1.117 g/mL.

Accepted Answer

A)  0.150 m
B)  1.51 m
C)  1.70 m
D)  1.89 m
E)  2.10 mF) B) and C)
G) A) and D)

Question 20

The solubility of oxygen in water is about 4.5 * 10-2 g/L. The water portion of an adult's total blood supply is about 5 liters. How many grams of oxygen could dissolve in 5 liters of water?

Accepted Answer

The answer of The solubility of oxygen in water is...

Exam 13: Physical Properties of Solutions

The solubility of CO2 gas in water

Correct AnswerverifiedShow Answer

What is the percent CsCl by mass in a 0.711 M CsCl solution that has a density of 1.091 g/mL?

Correct AnswerverifiedShow Answer

What is the osmotic pressure of a solution prepared from 13.7 g of the electrolyte HCl and enough water to make 0.500 L of solution at 18°C?

Correct AnswerverifiedShow Answer

The density of a 20.3 M CH3OH (methanol) solution is 0.858 g/mL. What is the molality of this solution? H2O is the solvent.

Correct AnswerverifiedShow Answer

What volume of water should be added to 600. mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol, Kb = 1.22 °C/m, density = 0.789 g/cm3, boiling point = 78.4°C)

Correct AnswerverifiedShow Answer

Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O2(g) in water at 25°C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10-3 mol/L·atm.

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions has the highest osmotic pressure at 25°C?

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Which of the following aqueous solutions has the highest boiling point? Kb for water is 0.52°C/m.

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Which of the following gives the molarity of a 17.0 % by mass solution of sodium acetate, CH3COONa (molar mass = 82.0 g/mol) in water? The density of the solution is 1.09 g/mL.

Correct AnswerverifiedD

A 100.-mL sample of water is taken from the Pacific Ocean, and the water is allowed to evaporate. The salts that remain (mostly NaCl)have a mass of 3.85 g. Calculate the original concentration of NaCl, in g per liter, in the water sample.

Correct Answerverified38.5 g/L

The term "proof" is defined as twice the percent by volume of pure ethanol in solution. A solution that is 95% ethanol is 190 proof. What is the molarity of ethanol in a 92-proof ethanol/water solution? (Given: density of ethanol = 0.80 g/cm3; density of water = 1.0 g/cm3)

Correct AnswerverifiedShow Answer

What is the freezing point of a solution that contains 10.0 g of glucose (C6H12O6) in 100. g of H2O? Kf for water is 1.86°C/m.

Correct AnswerverifiedShow Answer

The solubility of CO2 gas in water

Correct AnswerverifiedShow Answer

What is the molality of a solution that is 3.68 % by mass calcium chloride?

Correct AnswerverifiedC

Which one of the following would be immiscible with water?

Correct AnswerverifiedShow Answer

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation, winter or summer. Why should you not use ordinary water during the summer?

Correct AnswerverifiedThe antifreeze will lower the vapor pres...View AnswerShow Answer

What is the osmotic pressure of a 0.25 M solution of sucrose at 37°C? (R = 0.0821 L.atm/K.mol)

Correct AnswerverifiedShow Answer

A 9.50 % by mass solution of acetone (C3H6O) in water has a density of 0.9849 g/mL at 20°C. What is the molarity of this solution?

Correct AnswerverifiedShow Answer

Calculate the molality of a 20.0% by mass ammonium sulfate (NH4) 2SO4 solution. The density of the solution is 1.117 g/mL.

Correct AnswerverifiedShow Answer

The solubility of oxygen in water is about 4.5 * 10-2 g/L. The water portion of an adult's total blood supply is about 5 liters. How many grams of oxygen could dissolve in 5 liters of water?

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The solubility of CO₂ gas in water

Correct Answer
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Correct Answer
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Correct Answer
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The density of a 20.3 M CH₃OH (methanol) solution is 0.858 g/mL. What is the molality of this solution? H₂O is the solvent.

Correct Answer
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What volume of water should be added to 600. mL of ethanol in order to have a solution that boils at 95.0°C? (For ethanol, K_b = 1.22 °C/m, density = 0.789 g/cm³, boiling point = 78.4°C)

Correct Answer
verified

Oxygen gas makes up 21 % of the atmosphere by volume. What is the solubility of O₂(g) in water at 25°C if the atmospheric pressure is 741 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10^-³ mol/L·atm.

Correct Answer
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Correct Answer
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Which of the following aqueous solutions has the highest boiling point? K_b for water is 0.52°C/m.

Correct Answer
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Which of the following gives the molarity of a 17.0 % by mass solution of sodium acetate, CH₃COONa (molar mass = 82.0 g/mol) in water? The density of the solution is 1.09 g/mL.

Correct Answer
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D

Correct Answer
verified
38.5 g/L

The term "proof" is defined as twice the percent by volume of pure ethanol in solution. A solution that is 95% ethanol is 190 proof. What is the molarity of ethanol in a 92-proof ethanol/water solution? (Given: density of ethanol = 0.80 g/cm³; density of water = 1.0 g/cm³)

Correct Answer
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What is the freezing point of a solution that contains 10.0 g of glucose (C₆H₁₂O₆) in 100. g of H₂O? K_f for water is 1.86°C/m.

Correct Answer
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The solubility of CO₂ gas in water

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Correct Answer
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C

Correct Answer
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Correct Answer
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The antifreeze will lower the vapor pres...
View Answer

Correct Answer
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A 9.50 % by mass solution of acetone (C₃H₆O) in water has a density of 0.9849 g/mL at 20°C. What is the molarity of this solution?

Correct Answer
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Calculate the molality of a 20.0% by mass ammonium sulfate (NH₄) ₂SO₄ solution. The density of the solution is 1.117 g/mL.

Correct Answer
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The solubility of oxygen in water is about 4.5 * 10^-2 g/L. The water portion of an adult's total blood supply is about 5 liters. How many grams of oxygen could dissolve in 5 liters of water?

Correct Answer
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