Question 1

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

Question 2

To interconvert the concentration units of molarity (M)and mass percent, you must also know the density of the solution.

Accepted Answer

A) True 
 B)False

Question 3

Using your knowledge of osmosis or osmotic pressure explain the following statement: When sprinkled with sugar, a dish of sliced fruit will form its own juice.

Accepted Answer

The water inside the fruit cel...

Question 4

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, what is the molality, m, of aspirin in your blood? (Assume density of plasma is 1.00 g/mL.)

Accepted Answer

Question 5

Arrange the following aqueous solutions in order of increasing boiling points: 0.050m Mg(NO3) 2; 0.100m ethanol; 0.090m 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 C)
G) A) and E)

Question 6

A 23.0% by mass LiCl solution is prepared in water.What is the mole fraction of the water?

Accepted Answer

A)  0.113
B)  0.127
C)  0.873
D)  0.887
E)  0.911F) A) and C)
G) None of the above

Question 7

Calculate the molality of 6.0 M H2SO4 solution.The density of the solution is 1.34 g/mL.

Accepted Answer

A)  4.48 m
B)  7.98 m
C)  8.10 m
D)  8.43 m
E)  10.2 mF) None of the above
G) D) and E)

Question 8

A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114 g/mL at 20°C.What is the molarity of this solution?

Accepted Answer

A)  0.0114 M
B)  0.0568 M
C)  0.114 M
D)  2.27 M
E)  11.4 MF) D) and E)
G) C) and D)

Question 9

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kf of water is 1.86°C/m.

Accepted Answer

A)  17.6°C
B)  1.50°C
C)  -1.50°C
D)  -17.6°C
E)  -176°CF) C) and D)
G) B) and C)

Question 10

What is the mole fraction of sodium phosphate in a 0.142 M Na3PO4(aq)solution that has a density of 1.015 g/mL?

Accepted Answer

Question 11

Using your knowledge of osmosis or osmotic pressure explain the following statement: In trees and plants water is drawn from the soil up into the branches and leaves.

Accepted Answer

The water passes into the cell...

Question 12

Which of the following aqueous solutions has the largest molality of benzoic acid (C6H5COOH) ?

Accepted Answer

A)  3.5 m C6H5COOH
B)  mole fraction, X = 0.050 C6H5COOH
C)  2.50 mass % C6H5COOH
D)  3.2 g C6H5COOH in 650.g of H2O
E)  1.5 moles C6H5COOH in 65.0 moles of H2OF) B) and C)
G) A) and E)

Question 13

What is the boiling point of a solution of 12.0 g of urea (CH4N2O) in 165.0 g of water? (Kb (H2O) = 0.52 °C/m)

Accepted Answer

A)  99.4°C
B)  100.0 °C
C)  100.6°C
D)  106.2°C
E)  108.4°CF) A) and E)
G) D) and E)

Question 14

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution?

Accepted Answer

A)  769 g
B)  36.2 g
C)  100.g
D)  0.157 g
E)  157 gF) B) and E)
G) A) and D)

Question 15

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) All of the above

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) C) and D)
F) A) and C)

Question 17

The solubility of a solid always increases with increasing solvent temperature.

Accepted Answer

A) True 
 B)False

Question 18

An aqueous dextrose solution having a density of 1.04 g/cm3 freezes at -1.15°C.Find the osmotic pressure of this solution at 25°C.Kf of water is 1.86 °C/m; molecular mass of dextrose = 180.16 g/mol.

Accepted Answer

A)  12.9 atm
B)  13.8 atm
C)  14.1 atm
D)  15.1 atm
E)  120 atmF) B) and D)
G) A) and B)

Question 19

Which of the following solutions has the largest molality of HCl?

Accepted Answer

A)  4.5 m HCl
B)  mole fraction, X = 0.110 HCl
C)  15.0 mass % HCl
D)  10.5 g HCl in 750 g of H2O
E)  3.6 moles HCl in 45.0 moles of H2OF) C) and E)
G) A) and B)

Question 20

The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10-4 mol/L.What is the value of the Henry's Law constant in mol/L·atm?

Accepted Answer

A)  9.0 × 10-7 mol/L·atm
B)  3.2 × 10-4 mol/L·atm
C)  4.7 × 10-4 mol/L·atm
D)  6.8 × 10-4 mol/L·atm
E)  1.5 × 103 mol/L·atmF) C) and D)
G) B) and E)

Exam 12: Physical Properties of Solutions

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C₂H₆O₂) and 85.0 g H₂O? K_f of water is 1.86°C/m.

Correct Answer
verified

Calculate the molality of 6.0 M H₂SO₄ solution.The density of the solution is 1.34 g/mL.

Correct Answer
verified

Correct Answer
verified

An aqueous dextrose solution having a density of 1.04 g/cm³ freezes at -1.15°C.Find the osmotic pressure of this solution at 25°C.K_f of water is 1.86 °C/m; molecular mass of dextrose = 180.16 g/mol.

Correct Answer
verified

A 23.0% by mass LiCl solution is prepared in water.What is the mole fraction of the water?

Correct Answer
verified

During osmosis

Correct Answer
verified

Using your knowledge of osmosis or osmotic pressure explain the following statement: 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

What is the boiling point of a solution of 12.0 g of urea (CH₄N₂O) in 165.0 g of water? (K_b (H₂O) = 0.52 °C/m)

Correct Answer
verified

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

Correct Answer
verified

The solubility of a solid always increases with increasing solvent temperature.

Correct Answer
verified

A 20.0 % by mass solution of phosphoric acid (H₃PO₄) in water has a density of 1.114 g/mL at 20°C.What is the molarity of this solution?

Correct Answer
verified

Which of the following aqueous solutions has the largest molality of benzoic acid (C₆H₅COOH) ?

Correct Answer
verified

Which of the following solutions has the largest molality of HCl?

Correct Answer
verified

Using your knowledge of osmosis or osmotic pressure explain the following statement: In trees and plants water is drawn from the soil up into the branches and leaves.

Correct Answer
verified
The water passes into the cell...
View Answer

What is the mole fraction of sodium phosphate in a 0.142 M Na₃PO₄(aq)solution that has a density of 1.015 g/mL?

Correct Answer
verified

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH₄NO₃ in order to prepare a 0.452 m solution?

Correct Answer
verified

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

Correct Answer
verified

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
verified

To interconvert the concentration units of molarity (M)and mass percent, you must also know the density of the solution.

Correct Answer
verified

The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10^-4 mol/L.What is the value of the Henry's Law constant in mol/L·atm?

Correct Answer
verified

Exam 12: Physical Properties of Solutions

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C2H6O2) and 85.0 g H2O? Kf of water is 1.86°C/m.

Correct AnswerverifiedShow Answer

Calculate the molality of 6.0 M H2SO4 solution.The density of the solution is 1.34 g/mL.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An aqueous dextrose solution having a density of 1.04 g/cm3 freezes at -1.15°C.Find the osmotic pressure of this solution at 25°C.Kf of water is 1.86 °C/m; molecular mass of dextrose = 180.16 g/mol.

Correct AnswerverifiedShow Answer

A 23.0% by mass LiCl solution is prepared in water.What is the mole fraction of the water?

Correct AnswerverifiedShow Answer

During osmosis

Correct AnswerverifiedShow Answer

Using your knowledge of osmosis or osmotic pressure explain the following statement: When sprinkled with sugar, a dish of sliced fruit will form its own juice.

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

What is the boiling point of a solution of 12.0 g of urea (CH4N2O) in 165.0 g of water? (Kb (H2O) = 0.52 °C/m)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The solubility of a solid always increases with increasing solvent temperature.

Correct AnswerverifiedShow Answer

A 20.0 % by mass solution of phosphoric acid (H3PO4) in water has a density of 1.114 g/mL at 20°C.What is the molarity of this solution?

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions has the largest molality of benzoic acid (C6H5COOH) ?

Correct AnswerverifiedShow Answer

Which of the following solutions has the largest molality of HCl?

Correct AnswerverifiedShow Answer

Using your knowledge of osmosis or osmotic pressure explain the following statement: In trees and plants water is drawn from the soil up into the branches and leaves.

Correct AnswerverifiedThe water passes into the cell...View AnswerShow Answer

What is the mole fraction of sodium phosphate in a 0.142 M Na3PO4(aq)solution that has a density of 1.015 g/mL?

Correct AnswerverifiedShow Answer

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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 AnswerverifiedShow Answer

To interconvert the concentration units of molarity (M)and mass percent, you must also know the density of the solution.

Correct AnswerverifiedShow Answer

The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10-4 mol/L.What is the value of the Henry's Law constant in mol/L·atm?

Correct AnswerverifiedShow Answer

What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C₂H₆O₂) and 85.0 g H₂O? K_f of water is 1.86°C/m.

Correct Answer
verified

Calculate the molality of 6.0 M H₂SO₄ solution.The density of the solution is 1.34 g/mL.

Correct Answer
verified

Correct Answer
verified

An aqueous dextrose solution having a density of 1.04 g/cm³ freezes at -1.15°C.Find the osmotic pressure of this solution at 25°C.K_f of water is 1.86 °C/m; molecular mass of dextrose = 180.16 g/mol.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

What is the boiling point of a solution of 12.0 g of urea (CH₄N₂O) in 165.0 g of water? (K_b (H₂O) = 0.52 °C/m)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 20.0 % by mass solution of phosphoric acid (H₃PO₄) in water has a density of 1.114 g/mL at 20°C.What is the molarity of this solution?

Correct Answer
verified

Which of the following aqueous solutions has the largest molality of benzoic acid (C₆H₅COOH) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The water passes into the cell...
View Answer

What is the mole fraction of sodium phosphate in a 0.142 M Na₃PO₄(aq)solution that has a density of 1.015 g/mL?

Correct Answer
verified

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH₄NO₃ in order to prepare a 0.452 m solution?

Correct Answer
verified

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

Correct Answer
verified

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
verified

Correct Answer
verified

The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10^-4 mol/L.What is the value of the Henry's Law constant in mol/L·atm?

Correct Answer
verified