Question 1

Based on the formulas of the following solutes,which compound would have the smallest van't Hoff factor (i) ?

Accepted Answer

A)  Ca(NO3) 2(aq) 
B)  K2SO4(aq) 
C)  Th(SO4) 2(aq) 
D)  Al2(SO4) 3(aq) 
E)  MgSO4(aq) F) A) and D)
G) All of the above

Question 2

As the number of solute particles in a given volume of solution increases,

Accepted Answer

A)  the boiling point will increase and the vapor pressure will increase.
B)  the freezing point will decrease and the vapor pressure will decrease.
C)  the freezing point will increase and the vapor pressure will increase.
D)  the boiling point will decrease and the vapor pressure will decrease.
E)  the osmotic pressure will decrease and the lattice energy will increase.F) D) and E)
G) C) and E)

Question 3

Henry's Law constant is 0.034 mol/kg⋅bar and 0.0013 mol/kg⋅bar for CO2 and O2 respectively at 25°C.What pressure of O2 is required to achieve the same solubility as 0.368 bar of CO2?

Accepted Answer

A)  9.6 bar
B)  0.0 bar
C)   2 and O2 respectively at 25°C.What pressure of O2 is required to achieve the same solubility as 0.368 bar of CO2? 
A)  9.6 bar 
B)  0.0 bar 
C)     bar 
D)     bar 
E)  0.1 bar" class="answers-bank-image d-inline" rel="preload" > bar
D)   2 and O2 respectively at 25°C.What pressure of O2 is required to achieve the same solubility as 0.368 bar of CO2? 
A)  9.6 bar 
B)  0.0 bar 
C)     bar 
D)     bar 
E)  0.1 bar" class="answers-bank-image d-inline" rel="preload" > bar
E)  0.1 barF) A) and D)
G) A) and E)

Question 4

The volume of a 34.6% (by mass) solution is 129.0 mL.The density of the solution is 1.116 g/mL.What is the mass of solute in this solution?

Accepted Answer

A)  144 g
B)  49.8 g
C)  416 g
D)  40.0 g
E)  94 gF) C) and E)
G) B) and E)

Question 5

According to _____,the partial pressure of solvent,,over a solution equals the vapor pressure of the pure solvent,  ,times the mole fraction of solvent, 
,in the solution.

Accepted Answer

A)  ​Raoult's law
B)  Benford's law
C)  ​Dermott's law
D)  ​Leibniz's law
E)  ​Zipf's lawF) A) and D)
G) C) and E)

Question 6

What is the mass of H2SO4 in a 38.2-cm3 sample of concentrated sulfuric acid that has a density of 1.84 g/cm3 and consists of 98.3% H2SO4?

Accepted Answer

A)  37.6 g
B)  69.1 g
C)  4.73 g
D)  1.81 g
E)  20.4 gF) A) and E)
G) A) and B)

Question 7

Which of the following compounds is least soluble in water?

Accepted Answer

A)  CH3CH2CH2NH2
B)  CH3CH2CH2F
C)  CH3CH(OH) CH3
D)  CH3CH2COOH
E)  CH3CH2NHCH3F) A) and B)
G) D) and E)

Question 8

What is the mass percent of ethylene glycol (HOCH2CH2OH) in a solution of ethylene glycol in water that has a freezing point of -17.8°C? (Kf for water is 1.858°C/m.)

Accepted Answer

A)  99.8%
B)  37.2%
C)  59.4%
D)  64.7%
E)  9.58%F) D) and E)
G) A) and D)

Question 9

A 2.2-g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 31.2 mL of water at 28°C.What is the osmotic pressure of the solution? (R = 0.0821 L · atm/(K · mol) )

Accepted Answer

A)  32 mmHg
B)  1300 mmHg
C)  2.9 mmHg
D)  18,000 mmHg
E)  0.041 mmHgF) C) and D)
G) None of the above

Question 10

Fluids that mix with or dissolve in each other in all proportions are said to be _____.

Accepted Answer

A)  ​immiscible fluids
B)  ​miscible fluids
C)  ​heterogeneous fluids
D)  ​divergent fluids
E)  ​suspension fluidsF) All of the above
G) None of the above

Question 11

Which way of expressing concentration is used to relate the vapor pressure of a solution to the amount of nonvolatile solute dissolved in the solution?

Accepted Answer

A)  mole fraction
B)  molarity
C)  osmotic pressure
D)  mass percent
E)  molalityF) B) and E)
G) A) and E)

Question 12

What is the molar mass of an aromatic hydrocarbon if 0.75 g of the compound depresses the freezing point of 123 g of benzene by 0.28°C? (Kf for benzene is 5.12°C/m.)

Accepted Answer

A)  43 g/mol
B)  150 g/mol
C)  110.00 g/mol 110
D)  2900 g/mol
E)  140 g/molF) D) and E)
G) B) and C)

Question 13

Thyroxine,an important hormone that controls the rate of metabolism in the body,can be isolated from the thyroid gland.If 0.454 g of thyroxine is dissolved in 10.0 g of benzene,the freezing point of the solution could be measured as 5.144°C.Pure benzene freezes at 5.444°C and has a value for the molal freezing-point-depression constant of Kf of 5.12°C/m.What is the approximate molar mass of thyroxine?

Accepted Answer

A)  775 g/mol
B)  7.75 g/mol
C)  7.75 × 105 g/mol
D)  42.7 g/mol
E)  11.3 g/molF) B) and E)
G) All of the above

Question 14

What is the mole fraction of urea,CH4N2O,in an aqueous solution that is 37% urea by mass?

Accepted Answer

A)  0.15
B)  0.85
C)  0.37
D)  0.54
E)  0.66F) A) and E)
G) None of the above

Question 15

Osmotic pressure is

Accepted Answer

A)  inversely proportional to mass fraction.
B)  directly proportional to lattice energy.
C)  inversely proportional to molality.
D)  inversely proportional to mole fraction.
E)  directly proportional to molarity.F) B) and D)
G) A) and B)

Question 16

What is the molality of ethanol,C2H5OH,in an aqueous solution that is 36.4% ethanol by mass?

Accepted Answer

A)  1 m
B)  0 m
C)  12 m
D)  19 m
E)  97 mF) A) and B)
G) A) and C)

Question 17

What mass of a 29.0% by mass glucose,C6H12O6,solution contains 60.0 g of glucose?

Accepted Answer

A)  52.2 g
B)  207 g
C)  17.4 g
D)  96.7 g
E)  60.0 gF) C) and E)
G) A) and B)

Question 18

The volume of a 24.0% (by mass) solution is 65.2 mL.The density of the solution is 1.072 g/mL.What is the mass of the solution?

Accepted Answer

A)  69.8 g
B)  61 g
C)  1670 g
D)  167 g
E)  17 gF) C) and D)
G) A) and B)

Question 19

For a solution containing only one solute dissolved in a solvent,we can calculate the mole fraction of the solvent directly,given only

Accepted Answer

A)  the molar mass of the solute.
B)  the density of the solution.
C)  the molar mass of the solvent.
D)  the mole fraction of the solute.
E)  the molarity of the solution.F) None of the above
G) All of the above

Question 20

For which of the following aqueous solutions would one expect to have the largest van't Hoff factor (i) ?

Accepted Answer

A)  0.500 m K2SO4
B)  0.500 m NaCl
C)  0.500 m C6H12O6 (glucose) 
D)  0.050 m K2SO4
E)  0.050 m NaClF) All of the above
G) A) and C)

Exam 12: Solutions

What is the molality of ethanol,C₂H₅OH,in an aqueous solution that is 36.4% ethanol by mass?

Correct Answer
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Correct Answer
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Fluids that mix with or dissolve in each other in all proportions are said to be _____.

Correct Answer
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What is the molar mass of an aromatic hydrocarbon if 0.75 g of the compound depresses the freezing point of 123 g of benzene by 0.28°C? (K_f for benzene is 5.12°C/m.)

Correct Answer
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Osmotic pressure is

Correct Answer
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For a solution containing only one solute dissolved in a solvent,we can calculate the mole fraction of the solvent directly,given only

Correct Answer
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For which of the following aqueous solutions would one expect to have the largest van't Hoff factor (i) ?

Correct Answer
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What is the mass percent of ethylene glycol (HOCH₂CH₂OH) in a solution of ethylene glycol in water that has a freezing point of -17.8°C? (K_f for water is 1.858°C/m.)

Correct Answer
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What mass of a 29.0% by mass glucose,C₆H₁₂O₆,solution contains 60.0 g of glucose?

Correct Answer
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The volume of a 34.6% (by mass) solution is 129.0 mL.The density of the solution is 1.116 g/mL.What is the mass of solute in this solution?

Correct Answer
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A 2.2-g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 31.2 mL of water at 28°C.What is the osmotic pressure of the solution? (R = 0.0821 L · atm/(K · mol) )

Correct Answer
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The volume of a 24.0% (by mass) solution is 65.2 mL.The density of the solution is 1.072 g/mL.What is the mass of the solution?

Correct Answer
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As the number of solute particles in a given volume of solution increases,

Correct Answer
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Correct Answer
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Which of the following compounds is least soluble in water?

Correct Answer
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What is the mass of H₂SO₄ in a 38.2-cm³ sample of concentrated sulfuric acid that has a density of 1.84 g/cm³ and consists of 98.3% H₂SO₄?

Correct Answer
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Which way of expressing concentration is used to relate the vapor pressure of a solution to the amount of nonvolatile solute dissolved in the solution?

Correct Answer
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Based on the formulas of the following solutes,which compound would have the smallest van't Hoff factor (i) ?

Correct Answer
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Henry's Law constant is 0.034 mol/kg⋅bar and 0.0013 mol/kg⋅bar for CO₂ and O₂ respectively at 25°C.What pressure of O₂ is required to achieve the same solubility as 0.368 bar of CO₂?

Correct Answer
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What is the mole fraction of urea,CH₄N₂O,in an aqueous solution that is 37% urea by mass?

Correct Answer
verified

Exam 12: Solutions

What is the molality of ethanol,C2H5OH,in an aqueous solution that is 36.4% ethanol by mass?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Fluids that mix with or dissolve in each other in all proportions are said to be _____.

Correct AnswerverifiedShow Answer

What is the molar mass of an aromatic hydrocarbon if 0.75 g of the compound depresses the freezing point of 123 g of benzene by 0.28°C? (Kf for benzene is 5.12°C/m.)

Correct AnswerverifiedShow Answer

Osmotic pressure is

Correct AnswerverifiedShow Answer

For a solution containing only one solute dissolved in a solvent,we can calculate the mole fraction of the solvent directly,given only

Correct AnswerverifiedShow Answer

For which of the following aqueous solutions would one expect to have the largest van't Hoff factor (i) ?

Correct AnswerverifiedShow Answer

What is the mass percent of ethylene glycol (HOCH2CH2OH) in a solution of ethylene glycol in water that has a freezing point of -17.8°C? (Kf for water is 1.858°C/m.)

Correct AnswerverifiedShow Answer

What mass of a 29.0% by mass glucose,C6H12O6,solution contains 60.0 g of glucose?

Correct AnswerverifiedShow Answer

The volume of a 34.6% (by mass) solution is 129.0 mL.The density of the solution is 1.116 g/mL.What is the mass of solute in this solution?

Correct AnswerverifiedShow Answer

A 2.2-g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 31.2 mL of water at 28°C.What is the osmotic pressure of the solution? (R = 0.0821 L · atm/(K · mol) )

Correct AnswerverifiedShow Answer

The volume of a 24.0% (by mass) solution is 65.2 mL.The density of the solution is 1.072 g/mL.What is the mass of the solution?

Correct AnswerverifiedShow Answer

As the number of solute particles in a given volume of solution increases,

Correct AnswerverifiedShow Answer

According to _____,the partial pressure of solvent,,over a solution equals the vapor pressure of the pure solvent, ,times the mole fraction of solvent, ,in the solution.

Correct AnswerverifiedShow Answer

Which of the following compounds is least soluble in water?

Correct AnswerverifiedShow Answer

What is the mass of H2SO4 in a 38.2-cm3 sample of concentrated sulfuric acid that has a density of 1.84 g/cm3 and consists of 98.3% H2SO4?

Correct AnswerverifiedShow Answer

Which way of expressing concentration is used to relate the vapor pressure of a solution to the amount of nonvolatile solute dissolved in the solution?

Correct AnswerverifiedShow Answer

Based on the formulas of the following solutes,which compound would have the smallest van't Hoff factor (i) ?

Correct AnswerverifiedShow Answer

Henry's Law constant is 0.034 mol/kg⋅bar and 0.0013 mol/kg⋅bar for CO2 and O2 respectively at 25°C.What pressure of O2 is required to achieve the same solubility as 0.368 bar of CO2?

Correct AnswerverifiedShow Answer

What is the mole fraction of urea,CH4N2O,in an aqueous solution that is 37% urea by mass?

Correct AnswerverifiedShow Answer

What is the molality of ethanol,C₂H₅OH,in an aqueous solution that is 36.4% ethanol by mass?

Correct Answer
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Correct Answer
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Correct Answer
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What is the molar mass of an aromatic hydrocarbon if 0.75 g of the compound depresses the freezing point of 123 g of benzene by 0.28°C? (K_f for benzene is 5.12°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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What is the mass percent of ethylene glycol (HOCH₂CH₂OH) in a solution of ethylene glycol in water that has a freezing point of -17.8°C? (K_f for water is 1.858°C/m.)

Correct Answer
verified

What mass of a 29.0% by mass glucose,C₆H₁₂O₆,solution contains 60.0 g of glucose?

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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What is the mass of H₂SO₄ in a 38.2-cm³ sample of concentrated sulfuric acid that has a density of 1.84 g/cm³ and consists of 98.3% H₂SO₄?

Correct Answer
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Correct Answer
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Correct Answer
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Henry's Law constant is 0.034 mol/kg⋅bar and 0.0013 mol/kg⋅bar for CO₂ and O₂ respectively at 25°C.What pressure of O₂ is required to achieve the same solubility as 0.368 bar of CO₂?

Correct Answer
verified

What is the mole fraction of urea,CH₄N₂O,in an aqueous solution that is 37% urea by mass?

Correct Answer
verified