Question 1

Shaving cream is an example of which colloid type?

Accepted Answer

A)  aerosol
B)  foam
C)  emulsion
D)  sol
E)  coagulateF) B) and E)
G) All of the above

Question 2

Which of the following solutions has the lowest boiling point?

Accepted Answer

A)  0.15 M NaCl
B)  0.10 M MgBr2
C)  0.15 M Ba(NO3) 2
D)  0.20 M C2H6O2
E)  0.10 M Fe(NO3) 3F) C) and D)
G) A) and B)

Question 3

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of A in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 117.7 torr and 400.0 torr,respectively. )

Accepted Answer

A)  0.16
B)  196
C)  0.31
D)  3.40  ×	imes×  10-3
E)  4.90  ×	imes×  10-3 F) B) and C)
G) None of the above

Question 4

Which of the following solutions would have the highest osmotic pressure?

Accepted Answer

A)  0.2 M KBr,potassium bromide
B)  0.2 M MgBr2,magnesium bromide
C)  0.3 M CH3COOH,acetic acid
D)  0.3 M C6H12O6,glucose
E)  0.3 M C12H22O11,sucroseF) A) and E)
G) A) and C)

Question 5

A solution containing 292 g of Mg(NO3) 2 per liter has a density of 1.108 g/mL.The molality of the solution is:

Accepted Answer

A)  2.00 m
B)  2.41 m
C)  1.77 m
D)  6.39 m
E)  none of theseF) B) and C)
G) B) and E)

Question 6

In a 0.1 molar solution of NaCl in water,which one of the following will be closest to 0.1?

Accepted Answer

A)  The mole fraction of NaCl.
B)  The mass fraction of NaCl.
C)  The mass percent of NaCl.
D)  The molality of NaCl.
E)  All of these are about 0.1.F) A) and E)
G) C) and E)

Question 7

Calculate the molarity of a solution of magnesium chloride with a concentration of 26.8 mg/mL.

Accepted Answer

A)  0.563 M
B)  0.281 M
C)  0.141 M
D)  3.55 M
E)  0.448 MF) B) and C)
G) A) and C)

Question 8

The solubility of O2 in water is 0.590 g/L at an oxygen pressure of around 14.5 atm.What is the Henry's law constant for O2 (in units of mol/L·atm) ?

Accepted Answer

A)  4.07  ×	imes×  10-2
B)  1.27  ×	imes×  10-3
C)  7.86  ×	imes×  102
D)  2.67  ×	imes×  10-1
E)  None of the above are within 5% of the correct answer. F) B) and D)
G) None of the above

Question 9

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of B in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 129.4 torr and 400.0 torr,respectively. )

Accepted Answer

A)  0.18
B)  0.22
C)  0.33
D)  0.78
E)  0.82F) B) and E)
G) C) and D)

Question 10

When a nonvolatile solute is added to a volatile solvent,the solution vapor pressure __________,the boiling point __________,the freezing point __________,and the osmotic pressure across a semipermeable membrane __________.

Accepted Answer

A)  decreases,increases,decreases,decreases
B)  increases,increases,decreases,increases
C)  increases,decreases,increases,decreases
D)  decreases,decreases,increases,decreases
E)  decreases,increases,decreases,increasesF) A) and B)
G) B) and D)

Question 11

Calculate the molarity of a solution containing KCl and water whose osmotic pressure at 21.6°C is 125 torr.Assume complete dissociation of the salt.

Accepted Answer

A)  0.00680 M
B)  5.17 M
C)  0.0464 M
D)  0.00340 M
E)  0.0928 MF) B) and D)
G) C) and D)

Question 12

A chemist is given a white solid that is suspected of being pure cocaine.When 1.22 g of the solid is dissolved in 15.60 g of benzene,the freezing point is lowered by 1.32°C.Calculate the molar mass of the solid.The molal freezing point constant (Kf)for benzene is 5.12°C/m.

Accepted Answer

303 g/mol
1.32°C = 5.12°C/m * ...

Question 13

A solution of two liquids,A and B,shows negative deviation from Raoult's law.This means that:

Accepted Answer

A)  The molecules of A interact strongly with other A-type molecules.
B)  The two liquids have a positive heat of solution.
C)  Molecules of A interact weakly,if at all,with B molecules.
D)  The molecules of A hinder the strong interaction between B molecules.
E)  Molecules of A interact more strongly with B than A with A,or B with B.F) All of the above
G) A) and B)

Question 14

What is the freezing point of an aqueous 1.58 molal NaCl solution? (Kf = 1.86°C/m)

Accepted Answer

A)  -2.94°C
B)  2.94°C
C)  -5.88°C
D)  5.88°C
E)  0.00°CF) A) and B)
G) B) and E)

Question 15

A solution contains 1 mole of liquid A and 3 moles of liquid B.This solution has a vapor pressure of 314 torr at 25°C.At 25°C,liquid A has a vapor pressure of 265 torr and liquid B has a vapor pressure of 355 torr.Which of the following is true?

Accepted Answer

A)  This solution exhibits a positive deviation from Raoult's Law.
B)  This solution exhibits a negative deviation from Raoult's Law.
C)  This solution is ideal.
D)  More information is needed to answer this question.
E)  None of these (A-
D)  .F) A) and E)
G) C) and E)

Question 16

How many of the following help determine whether or not a solution forms?
I.the polarities of the solute and solvent
II.the densities of the solute and solvent
III.the probability of the mixed state (of the solution) 
IV.the energies needed for the solution formation to occur
V.the state of matter of the solute (solid,liquid,gas)

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and E)
G) None of the above

Question 17

Calculate both the boiling point and the freezing point if 46.0 g of glycerol,C3H5(OH)3,is dissolved in 500.0 g of H2O.

Accepted Answer

freezing point = -1.86°C boiling point =...

Question 18

A 6.06-gram sample of a compound is dissolved in 250.grams of benzene.The freezing point of this solution is 1.02°C below that of pure benzene.What is the molar mass of this compound? (Note: Kf for benzene = 5.12°C/m. ) Ignore significant figures for this problem.

Accepted Answer

A)  30.4 g/mol
B)  122 g/mol
C)  243 g/mol
D)  4.83 g/mol
E)  60.8 g/molF) C) and D)
G) A) and E)

Question 19

A solution of water and a nonvolatile,nonionizing compound is placed in a tube with a semipermeable membrane on one side.The tube is placed in a beaker of pure water.What initial net effect will occur?

Accepted Answer

A)  Water will flow from the beaker to the tube.
B)  Water will flow from the tube to the beaker.
C)  The compound will pass through the membrane into the solution.
D)  Nothing will move through the membrane either way.
E)  Equilibrium is immediately established.F) A) and D)
G) B) and D)

Question 20

How many milliliters of 15.7 M H2SO4 are needed to prepare 600.0 mL of 0.10 M H2SO4?

Accepted Answer

A)  0.26 mL
B)  94 mL
C)  3.8 mL
D)  1.9 mL
E)  4.8 mLF) C) and D)
G) B) and C)

Exam 11: Properties of Solutions

When a nonvolatile solute is added to a volatile solvent,the solution vapor pressure ,the boiling point ,the freezing point ,and the osmotic pressure across a semipermeable membrane .

Correct Answer
verified

Shaving cream is an example of which colloid type?

Correct Answer
verified

Calculate the molarity of a solution containing KCl and water whose osmotic pressure at 21.6°C is 125 torr.Assume complete dissociation of the salt.

Correct Answer
verified

A solution of water and a nonvolatile,nonionizing compound is placed in a tube with a semipermeable membrane on one side.The tube is placed in a beaker of pure water.What initial net effect will occur?

Correct Answer
verified

Correct Answer
verified

How many milliliters of 15.7 M H₂SO₄ are needed to prepare 600.0 mL of 0.10 M H₂SO₄?

Correct Answer
verified

Calculate both the boiling point and the freezing point if 46.0 g of glycerol,C₃H₅(OH)₃,is dissolved in 500.0 g of H₂O.

Correct Answer
verified
freezing point = -1.86°C boiling point =...
View Answer

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of A in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 117.7 torr and 400.0 torr,respectively. )

Correct Answer
verified

A solution containing 292 g of Mg(NO₃) ₂ per liter has a density of 1.108 g/mL.The molality of the solution is:

Correct Answer
verified

In a 0.1 molar solution of NaCl in water,which one of the following will be closest to 0.1?

Correct Answer
verified

Calculate the molarity of a solution of magnesium chloride with a concentration of 26.8 mg/mL.

Correct Answer
verified

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of B in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 129.4 torr and 400.0 torr,respectively. )

Correct Answer
verified

What is the freezing point of an aqueous 1.58 molal NaCl solution? (K_f = 1.86°C/m)

Correct Answer
verified

A solution of two liquids,A and B,shows negative deviation from Raoult's law.This means that:

Correct Answer
verified

Which of the following solutions would have the highest osmotic pressure?

Correct Answer
verified

A 6.06-gram sample of a compound is dissolved in 250.grams of benzene.The freezing point of this solution is 1.02°C below that of pure benzene.What is the molar mass of this compound? (Note: K_f for benzene = 5.12°C/m. ) Ignore significant figures for this problem.

Correct Answer
verified

A solution contains 1 mole of liquid A and 3 moles of liquid B.This solution has a vapor pressure of 314 torr at 25°C.At 25°C,liquid A has a vapor pressure of 265 torr and liquid B has a vapor pressure of 355 torr.Which of the following is true?

Correct Answer
verified

Which of the following solutions has the lowest boiling point?

Correct Answer
verified

A chemist is given a white solid that is suspected of being pure cocaine.When 1.22 g of the solid is dissolved in 15.60 g of benzene,the freezing point is lowered by 1.32°C.Calculate the molar mass of the solid.The molal freezing point constant (K_f)for benzene is 5.12°C/m.

Correct Answer
verified
303 g/mol
1.32°C = 5.12°C/m * ...
View Answer

The solubility of O₂ in water is 0.590 g/L at an oxygen pressure of around 14.5 atm.What is the Henry's law constant for O₂ (in units of mol/L·atm) ?

Correct Answer
verified

Exam 11: Properties of Solutions

When a nonvolatile solute is added to a volatile solvent,the solution vapor pressure __________,the boiling point __________,the freezing point __________,and the osmotic pressure across a semipermeable membrane __________.

Correct AnswerverifiedShow Answer

Shaving cream is an example of which colloid type?

Correct AnswerverifiedShow Answer

Calculate the molarity of a solution containing KCl and water whose osmotic pressure at 21.6°C is 125 torr.Assume complete dissociation of the salt.

Correct AnswerverifiedShow Answer

A solution of water and a nonvolatile,nonionizing compound is placed in a tube with a semipermeable membrane on one side.The tube is placed in a beaker of pure water.What initial net effect will occur?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

How many milliliters of 15.7 M H2SO4 are needed to prepare 600.0 mL of 0.10 M H2SO4?

Correct AnswerverifiedShow Answer

Calculate both the boiling point and the freezing point if 46.0 g of glycerol,C3H5(OH)3,is dissolved in 500.0 g of H2O.

Correct Answerverifiedfreezing point = -1.86°C boiling point =...View AnswerShow Answer

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of A in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 117.7 torr and 400.0 torr,respectively. )

Correct AnswerverifiedShow Answer

A solution containing 292 g of Mg(NO3) 2 per liter has a density of 1.108 g/mL.The molality of the solution is:

Correct AnswerverifiedShow Answer

In a 0.1 molar solution of NaCl in water,which one of the following will be closest to 0.1?

Correct AnswerverifiedShow Answer

Calculate the molarity of a solution of magnesium chloride with a concentration of 26.8 mg/mL.

Correct AnswerverifiedShow Answer

Consider a solution containing liquids A and B where the mole fraction of B is 0.60.Assuming ideality,calculate the mole fraction of B in the vapor at equilibrium with this solution at 25°C.(The vapor pressures of pure liquid A and B at 25°C are 129.4 torr and 400.0 torr,respectively. )

Correct AnswerverifiedShow Answer

What is the freezing point of an aqueous 1.58 molal NaCl solution? (Kf = 1.86°C/m)

Correct AnswerverifiedShow Answer

A solution of two liquids,A and B,shows negative deviation from Raoult's law.This means that:

Correct AnswerverifiedShow Answer

Which of the following solutions would have the highest osmotic pressure?

Correct AnswerverifiedShow Answer

A 6.06-gram sample of a compound is dissolved in 250.grams of benzene.The freezing point of this solution is 1.02°C below that of pure benzene.What is the molar mass of this compound? (Note: Kf for benzene = 5.12°C/m. ) Ignore significant figures for this problem.

Correct AnswerverifiedShow Answer

A solution contains 1 mole of liquid A and 3 moles of liquid B.This solution has a vapor pressure of 314 torr at 25°C.At 25°C,liquid A has a vapor pressure of 265 torr and liquid B has a vapor pressure of 355 torr.Which of the following is true?

Correct AnswerverifiedShow Answer

Which of the following solutions has the lowest boiling point?

Correct AnswerverifiedShow Answer

A chemist is given a white solid that is suspected of being pure cocaine.When 1.22 g of the solid is dissolved in 15.60 g of benzene,the freezing point is lowered by 1.32°C.Calculate the molar mass of the solid.The molal freezing point constant (Kf)for benzene is 5.12°C/m.

Correct Answerverified303 g/mol1.32°C = 5.12°C/m * ...View AnswerShow Answer

The solubility of O2 in water is 0.590 g/L at an oxygen pressure of around 14.5 atm.What is the Henry's law constant for O2 (in units of mol/L·atm) ?

Correct AnswerverifiedShow Answer

When a nonvolatile solute is added to a volatile solvent,the solution vapor pressure ,the boiling point ,the freezing point ,and the osmotic pressure across a semipermeable membrane .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many milliliters of 15.7 M H₂SO₄ are needed to prepare 600.0 mL of 0.10 M H₂SO₄?

Correct Answer
verified

Calculate both the boiling point and the freezing point if 46.0 g of glycerol,C₃H₅(OH)₃,is dissolved in 500.0 g of H₂O.

Correct Answer
verified
freezing point = -1.86°C boiling point =...
View Answer

Correct Answer
verified

A solution containing 292 g of Mg(NO₃) ₂ per liter has a density of 1.108 g/mL.The molality of the solution is:

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

What is the freezing point of an aqueous 1.58 molal NaCl solution? (K_f = 1.86°C/m)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 6.06-gram sample of a compound is dissolved in 250.grams of benzene.The freezing point of this solution is 1.02°C below that of pure benzene.What is the molar mass of this compound? (Note: K_f for benzene = 5.12°C/m. ) Ignore significant figures for this problem.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A chemist is given a white solid that is suspected of being pure cocaine.When 1.22 g of the solid is dissolved in 15.60 g of benzene,the freezing point is lowered by 1.32°C.Calculate the molar mass of the solid.The molal freezing point constant (K_f)for benzene is 5.12°C/m.

Correct Answer
verified
303 g/mol
1.32°C = 5.12°C/m * ...
View Answer

The solubility of O₂ in water is 0.590 g/L at an oxygen pressure of around 14.5 atm.What is the Henry's law constant for O₂ (in units of mol/L·atm) ?

Correct Answer
verified