Question 1

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.144°C.Pure benzene freezes at 5.444°C and has a Kf of 5.12°C/m.What is the molar mass of thyroxine?

Accepted Answer

Question 2

What is the approximate Na+ ion concentration in a 0.75 M Na2CO3 solution?

Accepted Answer

A)  0.375 M
B)  0.75 M
C)  1.25 M
D)  1.50 M
E)  2.25 MF) A) and E)
G) A) and D)

Question 3

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

Question 4

Which of the following compounds should be soluble in CCl4?

Accepted Answer

A)  NaCl
B)  H2O
C)  NaOH
D)  C8H18
E)  None of theseF) A) and E)
G) All of the above

Question 5

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) None of the above
F) All of the above

Question 6

Consider a 0.90 M Al(NO3) 3 solution. This solution has a nitrate ion concentration of

Accepted Answer

A)  0.30 M
B)  0.90 M
C)  0.0 M
D)  8.1 M
E)  2.7 MF) A) and D)
G) C) and E)

Question 7

Explain the following, on the basis of osmosis or osmotic pressure: When sprinkled with sugar, a dish of sliced fruit will form its own juice.

Accepted Answer

The water inside the fruit cel...

Question 8

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

Question 10

What mass of ethanol, C2H5OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. Kf of water is 1.86°C/m.

Accepted Answer

A)  85.7 kg
B)  24.8 kg
C)  5.38 kg
D)  2.48 kg
E)  1.17 kgF) A) and B)
G) C) and D)

Question 11

The vapor pressure of water at 20°C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 * 102 g of sucrose (C12H22O11) and 3.50 * 102 g water?

Accepted Answer

A)  0.51 mmHg
B)  16.0 mmHg
C)  17.0 mmHg
D)  18.0 mmHg
E)  19.4 mmHgF) A) and B)
G) A) and E)

Question 12

What is the molarity and molality of a solution that is 10.00 % by mass potassium hydrogen carbonate (KHCO3, 100.11 g/mol)and has a density of 1.0650 g/mL?

Accepted Answer

Question 13

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) A) and D)
G) D) and E)

Question 14

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 15

Some KCl is dissolved in water 25°C, where it completely dissociates.The vapor pressure of pure water at 25°C is 28.3 mmHg. Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25°C by 5%.

Accepted Answer

The answer of Some KCl is dissolved in water 25°C,...

Question 16

At 10 ∘\circ∘ C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure.What is the Henry's Law constant in mol/L·atm?

Accepted Answer

A)  3.8
B)  0.043
C)  36.
D)  3.1
E)  0.13 F) B) and C)
G) B) and E)

Question 17

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 18

Heat of solution

Accepted Answer

A)  is never positive ( Δ\DeltaΔ H°soln  ≤\le≤  0) , because the solute-solvent attraction is never weaker than the combination of the solute-solute attraction and solvent-solvent attraction.
B)  is always positive ( Δ\DeltaΔ H°soln > 0) , because the solute-solvent attraction is always weaker than the combination of the solute-solute attraction and solvent-solvent attraction.
C)  is always zero ( Δ\DeltaΔ H°soln = 0) , because the solute-solvent attraction is defined as the average of the solute-solute attraction and solvent-solvent attraction.
D)  is always negative ( Δ\DeltaΔ H°soln 
E)  may be positive, zero, or negative, depending on the relative strength of the solute-solvent, solute-solute, and solvent-solvent attractive forces. F) D) and E)
G) A) and B)

Question 19

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 20

How many liters of ethylene glycol antifreeze (C2H6O2)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, Kf = 1.86°C/m.)

Accepted Answer

Exam 12: Physical Properties of Solutions

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
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At 10^$\circ$C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure.What is the Henry's Law constant in mol/L·atm?

Correct Answer
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The solubility of CO₂ gas in water

Correct Answer
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Which of the following compounds should be soluble in CCl₄?

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

The vapor pressure of water at 20°C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 * 10² g of sucrose (C₁₂H₂₂O₁₁) and 3.50 * 10² g water?

Correct Answer
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Consider a 0.90 M Al(NO₃) ₃ solution. This solution has a nitrate ion concentration of

Correct Answer
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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

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
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Correct Answer
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What is the approximate Na⁺ ion concentration in a 0.75 M Na₂CO₃ solution?

Correct Answer
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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
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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
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What is the molarity and molality of a solution that is 10.00 % by mass potassium hydrogen carbonate (KHCO₃, 100.11 g/mol)and has a density of 1.0650 g/mL?

Correct Answer
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Some KCl is dissolved in water 25°C, where it completely dissociates.The vapor pressure of pure water at 25°C is 28.3 mmHg. Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25°C by 5%.

Correct Answer
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How many liters of ethylene glycol antifreeze (C₂H₆O₂)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, K_f = 1.86°C/m.)

Correct Answer
verified

Explain the following, on the basis of osmosis or osmotic pressure: When sprinkled with sugar, a dish of sliced fruit will form its own juice.

Correct Answer
verified
The water inside the fruit cel...
View Answer

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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Heat of solution

Correct Answer
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What mass of ethanol, C₂H₅OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. K_f of water is 1.86°C/m.

Correct Answer
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Exam 12: Physical Properties of Solutions

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

At 10 ∘\circ∘ C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure.What is the Henry's Law constant in mol/L·atm?

Correct AnswerverifiedShow Answer

The solubility of CO2 gas in water

Correct AnswerverifiedShow Answer

Which of the following compounds should be soluble in CCl4?

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

The vapor pressure of water at 20°C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 * 102 g of sucrose (C12H22O11) and 3.50 * 102 g water?

Correct AnswerverifiedShow Answer

Consider a 0.90 M Al(NO3) 3 solution. This solution has a nitrate ion concentration of

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

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

Correct AnswerverifiedShow Answer

What is the approximate Na+ ion concentration in a 0.75 M Na2CO3 solution?

Correct AnswerverifiedShow 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

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

What is the molarity and molality of a solution that is 10.00 % by mass potassium hydrogen carbonate (KHCO3, 100.11 g/mol)and has a density of 1.0650 g/mL?

Correct AnswerverifiedShow Answer

Some KCl is dissolved in water 25°C, where it completely dissociates.The vapor pressure of pure water at 25°C is 28.3 mmHg. Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25°C by 5%.

Correct AnswerverifiedShow Answer

How many liters of ethylene glycol antifreeze (C2H6O2)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, Kf = 1.86°C/m.)

Correct AnswerverifiedShow Answer

Explain the following, on the basis of osmosis or osmotic pressure: When sprinkled with sugar, a dish of sliced fruit will form its own juice.

Correct AnswerverifiedThe water inside the fruit cel...View AnswerShow Answer

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

Heat of solution

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What mass of ethanol, C2H5OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. Kf of water is 1.86°C/m.

Correct AnswerverifiedShow 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

At 10^$\circ$C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure.What is the Henry's Law constant in mol/L·atm?

Correct Answer
verified

The solubility of CO₂ gas in water

Correct Answer
verified

Which of the following compounds should be soluble in CCl₄?

Correct Answer
verified

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

The vapor pressure of water at 20°C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 * 10² g of sucrose (C₁₂H₂₂O₁₁) and 3.50 * 10² g water?

Correct Answer
verified

Consider a 0.90 M Al(NO₃) ₃ solution. This solution has a nitrate ion concentration of

Correct Answer
verified

Correct Answer
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The water passes fro...
View 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. K_f of water is 1.86°C/m.

Correct Answer
verified

Correct Answer
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What is the approximate Na⁺ ion concentration in a 0.75 M Na₂CO₃ solution?

Correct Answer
verified

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

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

What is the molarity and molality of a solution that is 10.00 % by mass potassium hydrogen carbonate (KHCO₃, 100.11 g/mol)and has a density of 1.0650 g/mL?

Correct Answer
verified

Correct Answer
verified

How many liters of ethylene glycol antifreeze (C₂H₆O₂)would you add to your car radiator containing 15.0 L of water if you needed to protect your engine to -17.8°C? (The density of ethylene glycol is 1.1 g/mL. For water, K_f = 1.86°C/m.)

Correct Answer
verified

Correct Answer
verified
The water inside the fruit cel...
View Answer

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
verified

Correct Answer
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What mass of ethanol, C₂H₅OH a nonelectrolyte, must be added to 10.0 L of water to give a solution that freezes at -10.0°C? Assume the density of water is 1.0 g/mL. K_f of water is 1.86°C/m.

Correct Answer
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