Question 1

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71  ×	imes×  10-4 mol/(L·atm) .How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Accepted Answer

A)  3.53  ×	imes×  10-4 g
B)  2.67  ×	imes×  10-3 g
C)  9.89  ×	imes×  10-3 g
D)  7.48  ×	imes×  10-2 g
E)  None of these choices is correct. F) All of the above
G) A) and B)

Question 2

The concentration of iodine in sea water is 60.parts per billion by mass.If one assumes that the iodine exists in the form of iodide anions,what is the molarity of iodide in sea water? (The density of sea water is 1.025 g/mL. )

Accepted Answer

A)  4.8  ×	imes×  10-13 M
B)  4.8  ×	imes×  10-10 M
C)  4.8  ×	imes×  10-7 M
D)  4.7  ×	imes×  10-4 M
E)  4.7  ×	imes×  10-1 M F) A) and C)
G) B) and E)

Question 3

A solution of sucrose (sugar) in water is in equilibrium with solid sucrose.If more solid sucrose is now added,with stirring,

Accepted Answer

A)  the concentration of the solution will increase.
B)  the concentration of the solution will decrease.
C)  the concentration of the solution will remain the same.
D)  the volume of solution will increase.
E)  a supersaturated solution will be produced.F) A) and C)
G) None of the above

Question 4

In general,water is a good solvent for both polar and non-polar compounds.

Accepted Answer

A) True 
 B)False

Question 5

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

Accepted Answer

A)  0.20 L
B)  0.57 L
C)  1.8 L
D)  3.6 L
E)  5.1 LF) None of the above
G) A) and B)

Question 6

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene ( b = 3.63°C/m,boiling point of pure chloroform = 61.70°C A) 12.6 g B) 17.2 g C) 31.0 g D) 34.4 g E) 101 g" class="answers-bank-image d-inline" rel="preload" >
= 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C?
Kb = 3.63°C/m,boiling point of pure chloroform = 61.70°C

Accepted Answer

A)  12.6 g
B)  17.2 g
C)  31.0 g
D)  34.4 g
E)  101 gF) C) and E)
G) A) and D)

Question 7

If a solute dissolves in an endothermic process

Accepted Answer

A)  H bonds must exist between solvent and solute.
B)  strong ion-dipole forces must exist in the solution.
C)  the solute must be a gas.
D)  the entropy of the solution is immaterial.
E)  the entropy of the solution must be greater than that of its pure components.F) D) and E)
G) A) and B)

Question 8

Heats of solution may be either positive or negative.

Accepted Answer

A) True 
 B)False

Question 9

When two pure substances are mixed to form a solution

Accepted Answer

A)  heat is released.
B)  heat is absorbed.
C)  there is an increase in entropy.
D)  there is a decrease in entropy.
E)  entropy is conserved.F) A) and B)
G) B) and E)

Question 10

Barbiturates are synthetic drugs used as sedatives and hypnotics.Barbital ( b = 3.07°C/m,boiling point of pure acetic acid = 117.9°C A) 117.0°C B) 117.7°C C) 118.1°C D) 118.8°C E) >120°C" class="answers-bank-image d-inline" rel="preload" >
= 184.2 g/mol) is one of the simplest of these drugs.What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid?
Kb = 3.07°C/m,boiling point of pure acetic acid = 117.9°C

Accepted Answer

A)  117.0°C
B)  117.7°C
C)  118.1°C
D)  118.8°C
E)  >120°CF) A) and B)
G) A) and C)

Question 11

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Accepted Answer

A)  0.1 M NaI
B)  0.2 M CuSO4
C)  0.5 M KBr
D)  2.0 M CuCl2
E)  2.5 M CsClF) A) and D)
G) B) and E)

Question 12

A 0.137 m solution of sodium ferrocyanide (NaFe(CN)6.10H2O)in water has a freezing point depression of 0.755°C.Calculate the van't Hoff factor (i)under these conditions.(Kf = 1.86°C/m)

Accepted Answer

Question 13

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water.Kf = 1.86°C/m

Accepted Answer

A)  3.3°C
B)  1.1°C
C)  0.0°C
D)  -1.1°C
E)  -3.3°CF) A) and E)
G) A) and C)

Exam 13: The Properties of Solutions

If a solute dissolves in an endothermic process

Correct Answer
verified

In general,water is a good solvent for both polar and non-polar compounds.

Correct Answer
verified

Heats of solution may be either positive or negative.

Correct Answer
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The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 $\times$ 10^-4 mol/(L·atm) .How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct Answer
verified

Barbiturates are synthetic drugs used as sedatives and hypnotics.Barbital ( = 184.2 g/mol) is one of the simplest of these drugs.What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? K_b = 3.07°C/m,boiling point of pure acetic acid = 117.9°C

Correct Answer
verified

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene ( = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? K_b = 3.63°C/m,boiling point of pure chloroform = 61.70°C

Correct Answer
verified

When two pure substances are mixed to form a solution

Correct Answer
verified

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H₃PO₄?

Correct Answer
verified

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water.K_f = 1.86°C/m

Correct Answer
verified

A solution of sucrose (sugar) in water is in equilibrium with solid sucrose.If more solid sucrose is now added,with stirring,

Correct Answer
verified

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Correct Answer
verified

The concentration of iodine in sea water is 60.parts per billion by mass.If one assumes that the iodine exists in the form of iodide anions,what is the molarity of iodide in sea water? (The density of sea water is 1.025 g/mL. )

Correct Answer
verified

A 0.137 m solution of sodium ferrocyanide (NaFe(CN)₆.10H₂O)in water has a freezing point depression of 0.755°C.Calculate the van't Hoff factor (i)under these conditions.(K_f = 1.86°C/m)

Correct Answer
verified

Exam 13: The Properties of Solutions

If a solute dissolves in an endothermic process

Correct AnswerverifiedShow Answer

In general,water is a good solvent for both polar and non-polar compounds.

Correct AnswerverifiedShow Answer

Heats of solution may be either positive or negative.

Correct AnswerverifiedShow Answer

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 ×\times× 10-4 mol/(L·atm) .How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct AnswerverifiedShow Answer

Barbiturates are synthetic drugs used as sedatives and hypnotics.Barbital ( = 184.2 g/mol) is one of the simplest of these drugs.What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? Kb = 3.07°C/m,boiling point of pure acetic acid = 117.9°C

Correct AnswerverifiedShow Answer

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene ( = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? Kb = 3.63°C/m,boiling point of pure chloroform = 61.70°C

Correct AnswerverifiedShow Answer

When two pure substances are mixed to form a solution

Correct AnswerverifiedShow Answer

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H3PO4?

Correct AnswerverifiedShow Answer

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water.Kf = 1.86°C/m

Correct AnswerverifiedShow Answer

A solution of sucrose (sugar) in water is in equilibrium with solid sucrose.If more solid sucrose is now added,with stirring,

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions should demonstrate the most non-ideal behavior?

Correct AnswerverifiedShow Answer

The concentration of iodine in sea water is 60.parts per billion by mass.If one assumes that the iodine exists in the form of iodide anions,what is the molarity of iodide in sea water? (The density of sea water is 1.025 g/mL. )

Correct AnswerverifiedShow Answer

A 0.137 m solution of sodium ferrocyanide (NaFe(CN)6.10H2O)in water has a freezing point depression of 0.755°C.Calculate the van't Hoff factor (i)under these conditions.(Kf = 1.86°C/m)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 $\times$ 10^-4 mol/(L·atm) .How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct Answer
verified

Barbiturates are synthetic drugs used as sedatives and hypnotics.Barbital ( = 184.2 g/mol) is one of the simplest of these drugs.What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? K_b = 3.07°C/m,boiling point of pure acetic acid = 117.9°C

Correct Answer
verified

Hexachlorophene is used as a disinfectant in germicidal soaps.What mass of hexachlorophene ( = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C? K_b = 3.63°C/m,boiling point of pure chloroform = 61.70°C

Correct Answer
verified

Correct Answer
verified

What volume of concentrated (14.7 M) phosphoric acid is needed to prepare 25.0 L of 3.0 M H₃PO₄?

Correct Answer
verified

Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water.K_f = 1.86°C/m

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 0.137 m solution of sodium ferrocyanide (NaFe(CN)₆.10H₂O)in water has a freezing point depression of 0.755°C.Calculate the van't Hoff factor (i)under these conditions.(K_f = 1.86°C/m)

Correct Answer
verified