Question 1

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) B) and E)
G) C) and D)

Question 2

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 C)
G) A) and E)

Question 3

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

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) None of the above
G) A) and C)

Question 5

Explain the following, on the basis of osmosis or osmotic pressure: An effective way to kill a snail or slug in your garden is to sprinkle it with salt.

Accepted Answer

The water leaves the...

Question 6

A 15.00 % by mass solution of lactose (C12H22O11, 342.30 g/mol) in water has a density of 1.0602 g/mL at 20°C.What is the molarity of this solution?

Accepted Answer

A)  0.03097 M
B)  0.4133 M
C)  0.4646 M
D)  1.590 M
E)  3.097 MF) A) and E)
G) A) and B)

Question 7

According to Raoult's law, which statement is false?

Accepted Answer

A)  The vapor pressure of a solvent over a solution decreases as its mole fraction increases.
B)  The solubility of a gas increases as the temperature decreases.
C)  The vapor pressure of a solvent over a solution is less than that of pure solvent.
D)  The greater the pressure of a gas over a solution the greater its solubility.
E)  Ionic solutes dissociate in solution causing an enhancement of all colligative properties.F) C) and D)
G) A) and C)

Question 8

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

Question 9

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water. The density of water is 0.997 g/mL.

Accepted Answer

A)  1.51 %
B)  7.57 %
C)  13.3 %
D)  15.2 %
E)  None of theseF) C) and D)
G) A) and D)

Question 10

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) None of the above
G) A) and B)

Question 11

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) B) and C)
G) None of the above

Question 12

Which one of the following would be immiscible with water?

Accepted Answer

The answer of Which one of the following would be...

Question 13

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) B) and C)
F) A) and B)

Question 14

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) B) and C)

Question 15

Calculate the mass of solute in the following solution: 50.0 mL of 0.0300 M C12H22O11.

Accepted Answer

Question 16

Arrange the following aqueous solutions in order of increasing boiling points: 0.050 m Mg(NO3) 2; 0.100 m ethanol; 0.090 m NaCl.

Accepted Answer

A)  Mg(NO3) 2 
B)  ethanol 3) 2 
C)  ethanol 3) 2
D)  NaCl 3) 2
E)  Mg(NO3) 2 < ethanol < NaClF) A) and E)
G) None of the above

Question 17

Plasma is the fluid portion of blood.The concentration of acetylsalicylic acid (aspirin, C9H8O4, molar mass = 180.g/mol)in your plasma is found to be 2.99 * 10-4 M after you take two tablets of aspirin.If the volume of your plasma is 5.85 L, how many grams of aspirin are in your blood? (Assume that the density of plasma is 1.00 g/mL.)

Accepted Answer

The answer of Plasma is the fluid portion of blood.The...

Question 18

For dilute aqueous solutions, the concentration units molarity and molality have almost the same values.

Accepted Answer

A) True 
 B)False

Question 19

Dissolving a solute such as KOH in a solvent such as water results in

Accepted Answer

A)  an increase in the melting point of the liquid.
B)  a decrease in the boiling point of the liquid.
C)  a decrease in the vapor pressure of the liquid.
D)  no change in the boiling point of the liquid.E) C) and D)
F) B) and D)

Question 20

What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071 g/mL?

Accepted Answer

A)  0.0890 M
B)  0.496 M
C)  0.543 M
D)  0.623 M
E)  1.32 MF) None of the above
G) C) and D)

Exam 12: Physical Properties of Solutions

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

Correct Answer
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Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water. The density of water is 0.997 g/mL.

Correct Answer
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Arrange the following aqueous solutions in order of increasing boiling points: 0.050 m Mg(NO₃) ₂; 0.100 m ethanol; 0.090 m NaCl.

Correct Answer
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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

What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071 g/mL?

Correct Answer
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For dilute aqueous solutions, the concentration units molarity and molality have almost the same values.

Correct Answer
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Correct Answer
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The solubility of CO₂ gas in water

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

Correct Answer
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Dissolving a solute such as KOH in a solvent such as water results in

Correct Answer
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A 15.00 % by mass solution of lactose (C₁₂H₂₂O₁₁, 342.30 g/mol) in water has a density of 1.0602 g/mL at 20°C.What is the molarity of this solution?

Correct Answer
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Calculate the mass of solute in the following solution: 50.0 mL of 0.0300 M C₁₂H₂₂O₁₁.

Correct Answer
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What is the molality of a solution that is 3.68 % by mass calcium chloride.

Correct Answer
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According to Raoult's law, which statement is false?

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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Explain the following, on the basis of osmosis or osmotic pressure: An effective way to kill a snail or slug in your garden is to sprinkle it with salt.

Correct Answer
verified
The water leaves the...
View 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 Answer
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Which one of the following would be immiscible with water?

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
verified

Exam 12: Physical Properties of Solutions

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

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

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water. The density of water is 0.997 g/mL.

Correct AnswerverifiedShow Answer

Arrange the following aqueous solutions in order of increasing boiling points: 0.050 m Mg(NO3) 2; 0.100 m ethanol; 0.090 m NaCl.

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

What is the molarity of a solution that is 7.00% by mass magnesium sulfate and has a density of 1.071 g/mL?

Correct AnswerverifiedShow Answer

For dilute aqueous solutions, the concentration units molarity and molality have almost the same values.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The solubility of CO2 gas in water

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Dissolving a solute such as KOH in a solvent such as water results in

Correct AnswerverifiedShow Answer

A 15.00 % by mass solution of lactose (C12H22O11, 342.30 g/mol) in water has a density of 1.0602 g/mL at 20°C.What is the molarity of this solution?

Correct AnswerverifiedShow Answer

Calculate the mass of solute in the following solution: 50.0 mL of 0.0300 M C12H22O11.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

According to Raoult's law, which statement is false?

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

Explain the following, on the basis of osmosis or osmotic pressure: An effective way to kill a snail or slug in your garden is to sprinkle it with salt.

Correct AnswerverifiedThe water leaves the...View AnswerShow 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

Which one of the following would be immiscible with water?

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, K_b = 1.22 °C/m, density = 0.789 g/cm³, boiling point = 78.4°C)

Correct Answer
verified

Correct Answer
verified

Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO₃ and 295 mL of water. The density of water is 0.997 g/mL.

Correct Answer
verified

Arrange the following aqueous solutions in order of increasing boiling points: 0.050 m Mg(NO₃) ₂; 0.100 m ethanol; 0.090 m NaCl.

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

Correct Answer
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Correct Answer
verified

Correct Answer
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The solubility of CO₂ gas in water

Correct Answer
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Correct Answer
verified

Correct Answer
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A 15.00 % by mass solution of lactose (C₁₂H₂₂O₁₁, 342.30 g/mol) in water has a density of 1.0602 g/mL at 20°C.What is the molarity of this solution?

Correct Answer
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Calculate the mass of solute in the following solution: 50.0 mL of 0.0300 M C₁₂H₂₂O₁₁.

Correct Answer
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Correct Answer
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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
verified

Correct Answer
verified
The water leaves the...
View 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 Answer
verified

Correct Answer
verified

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
verified