Question 1

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? Kb of water is 0.52°C/m. Assume the density of the solution is the same as that of pure water.

Accepted Answer

A)  0.22°C
B)  0.429°C
C)  100.43°C
D)  99.78°C
E)  100.22°CF) A) and E)
G) B) and C)

Question 2

When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.

Accepted Answer

A)  41.9 g
B)  47.5 g
C)  54.9 g
D)  178 g
E)  190. gF) B) and E)
G) A) and E)

Question 3

What is the concentration of O2(g)in water at 25°C exposed to a partial pressure of oxygen of 325 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10-3 mol/L·atm.

Accepted Answer

5.6 * 10<s...

Question 4

What is the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102.5°C? For water Kf = 1.86°C/m and Kb = 0.52°C/m.

Accepted Answer

A)  -8.94°C
B)  -366°C
C)  -0.99°C
D)  0.99°C
E)  8.94°CF) A) and C)
G) A) and D)

Question 5

When 12.1 g of the sugar sucrose (a nonelectrolyte) are dissolved in exactly 800 g of water, the solution has a freezing point of -0.082°C. What is the molar mass of sucrose? Kf of water is 1.86°C/m.

Accepted Answer

A)  426 g
B)  99.2 g
C)  178 g
D)  266 g
E)  343 gF) C) and E)
G) A) and C)

Question 6

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.444°C, and the Kf for benzene is 5.12°C/m. What is the molar mass of the unknown compound?

Accepted Answer

Question 7

Maple syrup is mostly a solution of sucrose in water. Calculate the molality of the syrup if a sample freezes at -0.50°C, assuming the solute is pure sucrose. [For water, Kf is 1.86°C/m.]

Accepted Answer

Question 8

A solution is prepared by adding 40.3 g of Mg(NO3)2 to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution.

Accepted Answer

mole fract...

Question 9

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)  92.6 g/mol
B)  78.0 g/mol
C)  10.7 g/mol
D)  81.8 g/mol
E)  927 g/molF) A) and D)
G) B) and C)

Question 10

Calculate the freezing point of a solution made from 22.0 g of octane (C8H18) dissolved in 148.0 g of benzene. Benzene freezes at 5.50°C and its Kf value is 5.12°C/m.

Accepted Answer

A)  -1.16°C
B)  0.98°C
C)  6.66°C
D)  12.2°C
E)  5.49°CF) A) and D)
G) B) and E)

Question 11

What volume of ethanol (density = 0.7893 g/cm3) should be added to 450. mL of water in order to have a solution that freezes at -15.0°C? (For water, Kf = 1.86 °C/m.)

Accepted Answer

A)  371 mL
B)  470 mL
C)  212 mL
D)  132 mL
E)  167 mLF) B) and C)
G) A) and E)

Question 12

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C3H7OH) dissolved in enough water to make 500. mL of solution at 27°C?

Accepted Answer

A)  0.014 atm
B)  0.037 atm
C)  0.456 atm
D)  0.01 atm
E)  11.2 atmF) C) and D)
G) A) and E)

Question 13

The solubility of gases in water always decreases with increasing temperature.

Accepted Answer

A) True 
 B)False

Question 14

In which of the following solvents would you expect KBr to be most soluble?

Accepted Answer

A)  C6H14 (hexane) 
B)  CH3CH2OH (ethanol) 
C)  C6H6 (benzene) 
D)  CCl4 (carbon tetrachloride) 
E)  C6H12 (cyclohexane) F) C) and D)
G) C) and E)

Question 15

A solution that contains 55.0 g of ascorbic acid (VitaminC)  in 250. g of water freezes at -2.34°C. Calculate the molar mass (in units of g/mol)  of the solute. Kf of water is 1.86°C/m.

Accepted Answer

A)   1.26
B)   10.9
C)   43.6
D)   175
E)   277F) C) and E)
G) A) and B)

Question 16

During osmosis

Accepted Answer

A)  pure solvent diffuses through a membrane but solutes do not.
B)  pure solutes diffuse through a membrane but solvent does not.
C)  pure solvent and a solution both diffuse at the same time through a membrane.
D)  gases diffuse through a membrane into a solution and build up pressure.E) A) and B)
F) A) and C)

Question 17

Calculate the molality of a 15.0% by mass solution of MgCl2 in H2O. The density of this solution is 1.127 g/mL.

Accepted Answer

A)  0.157 m
B)  11.8 m
C)  1.86 m
D)  0.0134 m
E)  1.58 mF) A) and D)
G) B) and E)

Question 18

Pure benzene, C6H6, freezes at 5.5° and boils at 80.1°C. What is the boiling point of a solution consisting of cyclohexane (C6H12) dissolved in benzene if the freezing point of this solution is 0.0°C? (For benzene, Kf = 5.12 °C/m, Kb = 2.53 °C/m; for cyclohexane, Kf = 20.0 °C/m, Kb = 2.79°C/m)

Accepted Answer

A)  82.8°C
B)  91.2°C
C)  80.9°C
D)  77.4°C
E)  83.1°CF) C) and E)
G) None of the above

Question 19

Explain the following, on the basis of osmosis or osmotic pressure: Drinking salt water actually dehydrates our tissues.

Accepted Answer

The water passes fro...

Question 20

The solubility of gases in water usually decreases with

Accepted Answer

A)  increasing pressure.
B)  increasing temperature.
C)  decreasing temperature.D) All of the above
E) B) and C)

Exam 13: Physical Properties of Solutions

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? K_b of water is 0.52°C/m. Assume the density of the solution is the same as that of pure water.

Correct Answer
verified

When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? K_f of water is 1.86°C/m.

Correct Answer
verified

When 12.1 g of the sugar sucrose (a nonelectrolyte) are dissolved in exactly 800 g of water, the solution has a freezing point of -0.082°C. What is the molar mass of sucrose? K_f of water is 1.86°C/m.

Correct Answer
verified

What is the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102.5°C? For water K_f = 1.86°C/m and K_b = 0.52°C/m.

Correct Answer
verified

The solubility of gases in water always decreases with increasing temperature.

Correct Answer
verified

A solution that contains 55.0 g of ascorbic acid (VitaminC) in 250. g of water freezes at -2.34°C. Calculate the molar mass (in units of g/mol) of the solute. K_f of water is 1.86°C/m.

Correct Answer
verified

A solution is prepared by adding 40.3 g of Mg(NO₃)₂ to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution.

Correct Answer
verified
mole fract...
View Answer

Maple syrup is mostly a solution of sucrose in water. Calculate the molality of the syrup if a sample freezes at -0.50°C, assuming the solute is pure sucrose. [For water, K_f is 1.86°C/m.]

Correct Answer
verified

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.444°C, and the K_f for benzene is 5.12°C/m. What is the molar mass of the unknown compound?

Correct Answer
verified

During osmosis

Correct Answer
verified

What volume of ethanol (density = 0.7893 g/cm³) should be added to 450. mL of water in order to have a solution that freezes at -15.0°C? (For water, K_f = 1.86 °C/m.)

Correct Answer
verified

Calculate the freezing point of a solution made from 22.0 g of octane (C₈H₁₈) dissolved in 148.0 g of benzene. Benzene freezes at 5.50°C and its K_f value is 5.12°C/m.

Correct Answer
verified

The solubility of gases in water usually decreases with

Correct Answer
verified

Calculate the molality of a 15.0% by mass solution of MgCl₂ in H₂O. The density of this solution is 1.127 g/mL.

Correct Answer
verified

Correct Answer
verified

Explain the following, on the basis of osmosis or osmotic pressure: Drinking salt water actually dehydrates our tissues.

Correct Answer
verified
The water passes fro...
View Answer

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

In which of the following solvents would you expect KBr to be most soluble?

Correct Answer
verified

What is the concentration of O₂(g)in water at 25°C exposed to a partial pressure of oxygen of 325 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10^-3 mol/L·atm.

Correct Answer
verified
5.6 * 10
View Answer

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C₃H₇OH) dissolved in enough water to make 500. mL of solution at 27°C?

Correct Answer
verified

Exam 13: Physical Properties of Solutions

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? Kb of water is 0.52°C/m. Assume the density of the solution is the same as that of pure water.

Correct AnswerverifiedShow Answer

When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.

Correct AnswerverifiedShow Answer

When 12.1 g of the sugar sucrose (a nonelectrolyte) are dissolved in exactly 800 g of water, the solution has a freezing point of -0.082°C. What is the molar mass of sucrose? Kf of water is 1.86°C/m.

Correct AnswerverifiedShow Answer

What is the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102.5°C? For water Kf = 1.86°C/m and Kb = 0.52°C/m.

Correct AnswerverifiedShow Answer

The solubility of gases in water always decreases with increasing temperature.

Correct AnswerverifiedShow Answer

A solution that contains 55.0 g of ascorbic acid (VitaminC) in 250. g of water freezes at -2.34°C. Calculate the molar mass (in units of g/mol) of the solute. Kf of water is 1.86°C/m.

Correct AnswerverifiedShow Answer

A solution is prepared by adding 40.3 g of Mg(NO3)2 to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution.

Correct Answerverifiedmole fract...View AnswerShow Answer

Maple syrup is mostly a solution of sucrose in water. Calculate the molality of the syrup if a sample freezes at -0.50°C, assuming the solute is pure sucrose. [For water, Kf is 1.86°C/m.]

Correct AnswerverifiedShow Answer

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.444°C, and the Kf for benzene is 5.12°C/m. What is the molar mass of the unknown compound?

Correct AnswerverifiedShow Answer

During osmosis

Correct AnswerverifiedShow Answer

What volume of ethanol (density = 0.7893 g/cm3) should be added to 450. mL of water in order to have a solution that freezes at -15.0°C? (For water, Kf = 1.86 °C/m.)

Correct AnswerverifiedShow Answer

Calculate the freezing point of a solution made from 22.0 g of octane (C8H18) dissolved in 148.0 g of benzene. Benzene freezes at 5.50°C and its Kf value is 5.12°C/m.

Correct AnswerverifiedShow Answer

The solubility of gases in water usually decreases with

Correct AnswerverifiedShow Answer

Calculate the molality of a 15.0% by mass solution of MgCl2 in H2O. The density of this solution is 1.127 g/mL.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Explain the following, on the basis of osmosis or osmotic pressure: Drinking salt water actually dehydrates our tissues.

Correct AnswerverifiedThe water passes fro...View AnswerShow Answer

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

In which of the following solvents would you expect KBr to be most soluble?

Correct AnswerverifiedShow Answer

What is the concentration of O2(g)in water at 25°C exposed to a partial pressure of oxygen of 325 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10-3 mol/L·atm.

Correct Answerverified5.6 * 10View AnswerShow Answer

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C3H7OH) dissolved in enough water to make 500. mL of solution at 27°C?

Correct AnswerverifiedShow Answer

What is the boiling point of an aqueous solution of a nonelectrolyte that has an osmotic pressure of 10.50 atm at 25°C? K_b of water is 0.52°C/m. Assume the density of the solution is the same as that of pure water.

Correct Answer
verified

When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? K_f of water is 1.86°C/m.

Correct Answer
verified

When 12.1 g of the sugar sucrose (a nonelectrolyte) are dissolved in exactly 800 g of water, the solution has a freezing point of -0.082°C. What is the molar mass of sucrose? K_f of water is 1.86°C/m.

Correct Answer
verified

What is the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102.5°C? For water K_f = 1.86°C/m and K_b = 0.52°C/m.

Correct Answer
verified

Correct Answer
verified

A solution that contains 55.0 g of ascorbic acid (VitaminC) in 250. g of water freezes at -2.34°C. Calculate the molar mass (in units of g/mol) of the solute. K_f of water is 1.86°C/m.

Correct Answer
verified

A solution is prepared by adding 40.3 g of Mg(NO₃)₂ to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution.

Correct Answer
verified
mole fract...
View Answer

Maple syrup is mostly a solution of sucrose in water. Calculate the molality of the syrup if a sample freezes at -0.50°C, assuming the solute is pure sucrose. [For water, K_f is 1.86°C/m.]

Correct Answer
verified

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77°C. The freezing point of pure benzene is 5.444°C, and the K_f for benzene is 5.12°C/m. What is the molar mass of the unknown compound?

Correct Answer
verified

Correct Answer
verified

What volume of ethanol (density = 0.7893 g/cm³) should be added to 450. mL of water in order to have a solution that freezes at -15.0°C? (For water, K_f = 1.86 °C/m.)

Correct Answer
verified

Calculate the freezing point of a solution made from 22.0 g of octane (C₈H₁₈) dissolved in 148.0 g of benzene. Benzene freezes at 5.50°C and its K_f value is 5.12°C/m.

Correct Answer
verified

Correct Answer
verified

Calculate the molality of a 15.0% by mass solution of MgCl₂ in H₂O. The density of this solution is 1.127 g/mL.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The water passes fro...
View Answer

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

What is the concentration of O₂(g)in water at 25°C exposed to a partial pressure of oxygen of 325 mmHg? The Henry's law constant for oxygen gas at 25°C is 1.3 * 10^-3 mol/L·atm.

Correct Answer
verified
5.6 * 10
View Answer

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C₃H₇OH) dissolved in enough water to make 500. mL of solution at 27°C?

Correct Answer
verified