Question 1

Which one of the ionic compounds below would you expect to have the smallest (least negative)  lattice energy?

Accepted Answer

A)  MgF2
B)  MgCl2
C)  MgBr2
D)  MgI2
E)  CaI2F) A) and D)
G) A) and E)

Question 2

Which of the following solutions, assuming equal volumes and a nonvolatile solute, would have the lowest boiling point?

Accepted Answer

A)   
B)   
C)   
D)   E) B) and C)
F) A) and D)

Question 3

Which of the following must be true if the dissolution of an ionic solid in water is exothermic?

Accepted Answer

A)  The process requires energy.
B)  The solubility will increase with increasing temperature.
C)  The hydration energy exceeds the lattice energy.
D)  The ions must have charges greater in magnitude than 1.
E)  The change in enthalpy for this process is positive.F) D) and E)
G) C) and E)

Question 4

Which of the following compounds has the largest melting point?

Accepted Answer

A)  NaF
B)  KCl
C)  RbCl
D)  BeF2
E)  NaClF) A) and B)
G) A) and C)

Question 5

Describe how the molar mass of a compound can be determined from data obtained in two experiments: (1) measurements of the freezing point, and (2) measurements of the boiling point of a solution of the compound.

Accepted Answer

In both cases the changes are described ...

Question 6

Which listing of ionic compounds is in order of increasing melting point?

Accepted Answer

A)  NaF  MgF2  AlF3
B)  MgF2  NaF  AlF3
C)  AlF3  MgF2  NaF
D)  AlF3  NaF  MgF2
E)  NaF  AlF3  MgF2F) B) and D)
G) C) and D)

Question 7

What is the molality of a solution produced by dissolving 14.40 g of LiCl (42.39 g/mol)  in water to make 0.104 L of solution with a density of 1.102 g/mL?

Accepted Answer

A)  0.340 m
B)  3.39 m
C)  3.27 m
D)  3.74 m
E)  2.96 mF) B) and E)
G) A) and E)

Question 8

Identify the following statement as true or false and choose the correct explanation. "For solutions with the same reverse osmotic pressure at the same temperature, the molarity of a sodium chloride solution will always be less than the molarity of a calcium chloride solution."

Accepted Answer

A)  True, because the molar mass of sodium chloride is smaller.
B)  True, because the van 't Hoff factor is smaller for sodium chloride.
C)  False, because the van 't Hoff factor is smaller for sodium chloride.
D)  False, because the van 't Hoff factor is larger for sodium chloride.
E)  True, because the van 't Hoff factor is larger for sodium chloride.F) B) and D)
G) A) and D)

Question 9

What information is provided by the van 't Hoff factor?

Accepted Answer

The van 't Hoff factor gives t...

Question 10

What is the molarity of a sucrose (C12H22O11)  solution that produces an osmotic pressure of 2.65 atm at 25C?

Accepted Answer

A)  0.0349 M
B)  0.127 M
C)  0.0127 M
D)  0.108 M
E)  0.398 MF) B) and C)
G) B) and D)

Question 11

Predict the relationship between the lattice energies (U)  of KBr and CaO.

Accepted Answer

A)  UCaO  4 UKBr because the ionic charges are 2 and 2 and the distance between the ions is smaller.
B)  UCaO  4 UKBr because the ionic charges are 2 and 2 and the distance between the ions is larger..
C)  UCaO  2 UKBr because the ionic charges are 2 and 2 and the distance between the ions is smaller.
D)  UCaO  4 UKBr because the ionic charges are 2 and 2 and the distance between the ions is larger.
E)  UCaO and UKBr are about the same because the larger ionic charge is compensated by the larger distance between the ions.F) A) and C)
G) B) and D)

Question 12

Which statement regarding osmotic pressure is not correct? Osmotic pressure ________

Accepted Answer

A)  increases with increasing temperature.
B)  increases with increasing molar concentration of solute.
C)  is greater for 0.1 M Na2SO4 than for 0.1 M NaCl.
D)  depends on the value of the gas constant R.
E)  is the same for solutions with the same mass percent of solute.F) A) and D)
G) A) and B)

Question 13

Which of the following will require the greatest energy input to separate the ions?

Accepted Answer

A)  MgI2
B)  MgF2
C)  MgCl2
D)  MgBr2
E)  NaClF) None of the above
G) B) and C)

Question 14

A solution contains 6.50 mol water, 0.300 mol sucrose, and 0.200 mol glucose. The solutes are nonvolatile. What is the vapor pressure of the solution at 35C given that the vapor pressure of water is 42.2 torr?

Accepted Answer

A)  35.0 torr
B)  36.0 torr
C)  37.0 torr
D)  39.2 torr
E)  39.0 torrF) B) and D)
G) All of the above

Question 15

Ion interaction energies are determined by Coulomb's law:  3.83  1018 J? A) NaCl (d  294 pm)  B) MgS (d  241 pm)  C) LiF (d  189 pm)  D) CaO (d  235 pm)  E) AlN (d  185 pm) " class="answers-bank-image d-inline" rel="preload" > Which of the following compounds has an interaction energy  3.83  1018 J?

Accepted Answer

A)  NaCl (d  294 pm) 
B)  MgS (d  241 pm) 
C)  LiF (d  189 pm) 
D)  CaO (d  235 pm) 
E)  AlN (d  185 pm) F) D) and E)
G) A) and E)

Question 16

Ethylene glycol is used commonly as an antifreeze in automobile radiators. Automobile temperatures in the U.S. are commonly measured in degrees Fahrenheit. What is the freezing point in F1F1F1S1F1F1F10F of a 50:50 mixture of ethylene glycol and water by volume? (C2H6O2, 62.07 g/mol, 1.1132 g/mL, Kf F1F1F1S1F1F1F10 3.35F1F1F1S1F1F1F10F/m).

Accepted Answer

<font face="symbol">F...

Question 17

What is the boiling point of a 3.25 m KCl solution (Kb  0.52C/m for water) ?

Accepted Answer

A)  96.62C
B)  98.31C
C)  100.0C
D)  101.7C
E)  103.4CF) A) and E)
G) C) and D)

Question 18

A solution is prepared by mixing 75 g of benzene (C6H6)  with 25 g of toluene (C7H8) . Use the following data to determine the vapor pressure of this solution at 20C. Substance
Vapor Pressure at 20C (torr) 
Benzene
75
Toluene
22

Accepted Answer

A)  63 torr
B)  49 torr
C)  87 torr
D)  35 torr
E)  71 torrF) A) and B)
G) A) and E)

Question 19

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer.
density F1F1F1S1F1F1F10 1.022 g/mL
total mass of ions F1F1F1S1F1F1F10 35.17 g/kg
concentration of ions F1F1F1S1F1F1F10 1.15 M

Accepted Answer

The molarity gives the moles of ions in ...

Question 20

Cholesterol (386.7 g/mol)  is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (Kb  3.63C/m) ?

Accepted Answer

A)  0.11C
B)  0.22C
C)  0.55C
D)  1.1C
E)  6.1CF) C) and D)
G) All of the above

Exam 11: Solutions: Properties and Behavior

Which of the following must be true if the dissolution of an ionic solid in water is exothermic?

Correct Answer
verified

What information is provided by the van 't Hoff factor?

Correct Answer
verified
The van 't Hoff factor gives t...
View Answer

Which of the following compounds has the largest melting point?

Correct Answer
verified

Describe how the molar mass of a compound can be determined from data obtained in two experiments: (1) measurements of the freezing point, and (2) measurements of the boiling point of a solution of the compound.

Correct Answer
verified
In both cases the changes are described ...
View Answer

A solution contains 6.50 mol water, 0.300 mol sucrose, and 0.200 mol glucose. The solutes are nonvolatile. What is the vapor pressure of the solution at 35C given that the vapor pressure of water is 42.2 torr?

Correct Answer
verified

A solution is prepared by mixing 75 g of benzene (C₆H₆) with 25 g of toluene (C₇H₈) . Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

Correct Answer
verified

Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  10^¹⁸ J?

Correct Answer
verified

Correct Answer
verified
F...
View Answer

Which of the following solutions, assuming equal volumes and a nonvolatile solute, would have the lowest boiling point?

Correct Answer
verified

Which listing of ionic compounds is in order of increasing melting point?

Correct Answer
verified

Predict the relationship between the lattice energies (U) of KBr and CaO.

Correct Answer
verified

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer. density  1.022 g/mL total mass of ions  35.17 g/kg concentration of ions  1.15 M

Correct Answer
verified
The molarity gives the moles of ions in ...
View Answer

What is the molarity of a sucrose (C₁₂H₂₂O₁₁) solution that produces an osmotic pressure of 2.65 atm at 25C?

Correct Answer
verified

Identify the following statement as true or false and choose the correct explanation. "For solutions with the same reverse osmotic pressure at the same temperature, the molarity of a sodium chloride solution will always be less than the molarity of a calcium chloride solution."

Correct Answer
verified

Which of the following will require the greatest energy input to separate the ions?

Correct Answer
verified

What is the boiling point of a 3.25 m KCl solution (K_b  0.52C/m for water) ?

Correct Answer
verified

What is the molality of a solution produced by dissolving 14.40 g of LiCl (42.39 g/mol) in water to make 0.104 L of solution with a density of 1.102 g/mL?

Correct Answer
verified

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (K_b  3.63C/m) ?

Correct Answer
verified

Which statement regarding osmotic pressure is not correct? Osmotic pressure ________

Correct Answer
verified

Which one of the ionic compounds below would you expect to have the smallest (least negative) lattice energy?

Correct Answer
verified

Exam 11: Solutions: Properties and Behavior

Which of the following must be true if the dissolution of an ionic solid in water is exothermic?

Correct AnswerverifiedShow Answer

What information is provided by the van 't Hoff factor?

Correct AnswerverifiedThe van 't Hoff factor gives t...View AnswerShow Answer

Which of the following compounds has the largest melting point?

Correct AnswerverifiedShow Answer

Describe how the molar mass of a compound can be determined from data obtained in two experiments: (1) measurements of the freezing point, and (2) measurements of the boiling point of a solution of the compound.

Correct AnswerverifiedIn both cases the changes are described ...View AnswerShow Answer

A solution contains 6.50 mol water, 0.300 mol sucrose, and 0.200 mol glucose. The solutes are nonvolatile. What is the vapor pressure of the solution at 35C given that the vapor pressure of water is 42.2 torr?

Correct AnswerverifiedShow Answer

A solution is prepared by mixing 75 g of benzene (C6H6) with 25 g of toluene (C7H8) . Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

Correct AnswerverifiedShow Answer

Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  1018 J?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedF...View AnswerShow Answer

Which of the following solutions, assuming equal volumes and a nonvolatile solute, would have the lowest boiling point?

Correct AnswerverifiedShow Answer

Which listing of ionic compounds is in order of increasing melting point?

Correct AnswerverifiedShow Answer

Predict the relationship between the lattice energies (U) of KBr and CaO.

Correct AnswerverifiedShow Answer

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer. density  1.022 g/mL total mass of ions  35.17 g/kg concentration of ions  1.15 M

Correct AnswerverifiedThe molarity gives the moles of ions in ...View AnswerShow Answer

What is the molarity of a sucrose (C12H22O11) solution that produces an osmotic pressure of 2.65 atm at 25C?

Correct AnswerverifiedShow Answer

Identify the following statement as true or false and choose the correct explanation. "For solutions with the same reverse osmotic pressure at the same temperature, the molarity of a sodium chloride solution will always be less than the molarity of a calcium chloride solution."

Correct AnswerverifiedShow Answer

Which of the following will require the greatest energy input to separate the ions?

Correct AnswerverifiedShow Answer

What is the boiling point of a 3.25 m KCl solution (Kb  0.52C/m for water) ?

Correct AnswerverifiedShow Answer

What is the molality of a solution produced by dissolving 14.40 g of LiCl (42.39 g/mol) in water to make 0.104 L of solution with a density of 1.102 g/mL?

Correct AnswerverifiedShow Answer

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (Kb  3.63C/m) ?

Correct AnswerverifiedShow Answer

Which statement regarding osmotic pressure is not correct? Osmotic pressure ________

Correct AnswerverifiedShow Answer

Which one of the ionic compounds below would you expect to have the smallest (least negative) lattice energy?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
The van 't Hoff factor gives t...
View Answer

Correct Answer
verified

Correct Answer
verified
In both cases the changes are described ...
View Answer

Correct Answer
verified

A solution is prepared by mixing 75 g of benzene (C₆H₆) with 25 g of toluene (C₇H₈) . Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

Correct Answer
verified

Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  10^¹⁸ J?

Correct Answer
verified

Correct Answer
verified
F...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The molarity gives the moles of ions in ...
View Answer

What is the molarity of a sucrose (C₁₂H₂₂O₁₁) solution that produces an osmotic pressure of 2.65 atm at 25C?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the boiling point of a 3.25 m KCl solution (K_b  0.52C/m for water) ?

Correct Answer
verified

Correct Answer
verified

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (K_b  3.63C/m) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified