Question 1

From the following list of aqueous solutions and water, select the one with the highest freezing point.

Accepted Answer

A)  1.0 M KNO3 
B)  0.75 M NaCl 
C)  0.75 M CuCl2 
D)  2.0 M C12H22O11 (sucrose) 
E)  2.0 M KNO3 
A)  1.0 M KNO3 
B)  0.75 M NaCl 
C)  0.75 M CuCl2 
D)  2.0 M C12H22O11 (sucrose) 
E)  2.0 M KNO3

Question 2

Cinnamaldehyde (132.16 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol, Kb = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

Accepted Answer

A)  62.4 g 
B)  67.8 g 
C)  76.2 g 
D)  78.5 g 
E)  79.6 g 
A)  62.4 g 
B)  67.8 g 
C)  76.2 g 
D)  78.5 g 
E)  79.6 g

Question 3

________ ________ are properties that depend on the number of particles dissolved.

Accepted Answer

Colligativ

Question 4

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25°C? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  0.012 atm 
B)  0.62 atm 
C)  6.8 atm 
D)  7.3 atm 
E)  11 atm 
A)  0.012 atm 
B)  0.62 atm 
C)  6.8 atm 
D)  7.3 atm 
E)  11 atm

Question 5

What is the name given to the process when solvent molecules surround the solute molecules?

Accepted Answer

A)  Unsaturated 
B)  Solution 
C)  Oversaturated 
D)  Saturated 
E)  Solvation 
A)  Unsaturated 
B)  Solution 
C)  Oversaturated 
D)  Saturated 
E)  Solvation

Question 6

Which of the following compounds would be most likely to dissolve in CCl4?

Accepted Answer

A)  NaF 
B)  H2O 
C)  C8H18 
D)  KNO3 
A)  NaF 
B)  H2O 
C)  C8H18 
D)  KNO3

Question 7

Below is a representation of a sealed chamber containing pure liquid water in equilibrium with water vapor. The circles represent water vapor.   If a nonvolatile solute is added to the water, which best represents the new system at equilibrium?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 8

What is the name given to a solution that contains more solute than it has the capacity to dissolve?

Accepted Answer

A)  Unsaturated 
B)  Saturated 
C)  Soluted 
D)  Supersaturated 
E)  Oversaturated 
A)  Unsaturated 
B)  Saturated 
C)  Soluted 
D)  Supersaturated 
E)  Oversaturated

Question 9

________ is the process used to stabilize a colloid that would otherwise not stay dispersed.

Accepted Answer

The answer of ________ is the process used to stabilize...

Question 10

Which process defines how molecular compounds form ions upon dissolution?

Accepted Answer

A)  ionization 
B)  composition 
C)  division 
D)  dissolution 
E)  decomposition 
A)  ionization 
B)  composition 
C)  division 
D)  dissolution 
E)  decomposition

Question 11

Which is the correct description of a solution?

Accepted Answer

A)  A solution is a heterogeneous mixture of two or more substances. 
B)  A solution is a homogeneous mixture of two or more substances. 
C)  A solution may be a gas, solid, or liquid. 
D)  A solution is any mixture of two or more substances. 
A)  A solution is a heterogeneous mixture of two or more substances. 
B)  A solution is a homogeneous mixture of two or more substances. 
C)  A solution may be a gas, solid, or liquid. 
D)  A solution is any mixture of two or more substances.

Question 12

Raoult's Law relates the vapor pressure of the solvent above the solution to its mole fraction in the solution so that Raoult's law works best when applied to ________ (concentrated or dilute) solutions.

Accepted Answer

The answer of Raoult's Law relates the vapor pressure of...

Question 13

Which of these compounds is a strong electrolyte?

Accepted Answer

A)  H2O 
B)  O2 
C)  H2SO4 
D)  C6H12O6 (glucose) 
E)  CH3COOH (acetic acid) 
A)  H2O 
B)  O2 
C)  H2SO4 
D)  C6H12O6 (glucose) 
E)  CH3COOH (acetic acid)

Question 14

When sodium chloride dissolves in water, what stabilizes the ions in solution?

Accepted Answer

The ion-di

Question 15

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C3H7OH) dissolved in enough water to make 500. mL of solution at 27°C? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  9.7 atm 
B)  33.7 atm 
C)  0.4 atm 
D)  5.6 atm 
E)  11.2 atm 
A)  9.7 atm 
B)  33.7 atm 
C)  0.4 atm 
D)  5.6 atm 
E)  11.2 atm

Question 16

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation, winter or summer. Why should you not use ordinary water during the summer?

Accepted Answer

The antifreeze will lower the vapor pres

Question 17

The distinguishing characteristic of all nonelectrolyte solutions is that they

Accepted Answer

A)  contain ions. 
B)  do not conduct electricity. 
C)  react with other solutions. 
D)  always contain acids. 
E)  conducts heat. 
A)  contain ions. 
B)  do not conduct electricity. 
C)  react with other solutions. 
D)  always contain acids. 
E)  conducts heat.

Question 18

Below is a diagram representing a solvent A(l) in a 1-L beaker, and a solute X dissolved in the solvent. Solvent A has a density of 0.8 g/mL, and a molar mass of 40 g/mol. Solute X has a molar mass of 30 g/mol. Each circle of X represents 1 mol of X. Assume that the solute addition does not significantly change the volume of liquid in the beaker.   What is the molality of the solute X in this solution?

Accepted Answer

A)  2 m 
B)  4 m 
C)  5 m 
D)  0.004 m 
E)  0.005 m 
A)  2 m 
B)  4 m 
C)  5 m 
D)  0.004 m 
E)  0.005 m

Question 19

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)  97.8 m 
A)  17.4 m 
B)  20.8 m 
C)  23.7 m 
D)  70.0 m 
E)  97.8 m

Question 20

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? (For chloroform, Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Accepted Answer

A)  19.6 g 
B)  17.2 g 
C)  40.7 g 
D)  50.9 g 
E)  157 g 
A)  19.6 g 
B)  17.2 g 
C)  40.7 g 
D)  50.9 g 
E)  157 g

Exam 13: Physical Properties of Solutions

From the following list of aqueous solutions and water, select the one with the highest freezing point.

Cinnamaldehyde (132.16 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol, Kb = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

________ ________ are properties that depend on the number of particles dissolved.

Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25°C? (R = 0.08206 L • atm/K • mol)

What is the name given to the process when solvent molecules surround the solute molecules?

Which of the following compounds would be most likely to dissolve in CCl4?

Below is a representation of a sealed chamber containing pure liquid water in equilibrium with water vapor. The circles represent water vapor. If a nonvolatile solute is added to the water, which best represents the new system at equilibrium?

What is the name given to a solution that contains more solute than it has the capacity to dissolve?

________ is the process used to stabilize a colloid that would otherwise not stay dispersed.

Which process defines how molecular compounds form ions upon dissolution?

Which is the correct description of a solution?

Raoult's Law relates the vapor pressure of the solvent above the solution to its mole fraction in the solution so that Raoult's law works best when applied to ________ (concentrated or dilute) solutions.

Which of these compounds is a strong electrolyte?

When sodium chloride dissolves in water, what stabilizes the ions in solution?

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C3H7OH) dissolved in enough water to make 500. mL of solution at 27°C? (R = 0.08206 L • atm/K • mol)

Automobile radiators usually carry a sticker that indicates that they must contain an antifreeze solution for proper operation, winter or summer. Why should you not use ordinary water during the summer?

The distinguishing characteristic of all nonelectrolyte solutions is that they

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.

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? (For chloroform, Kb = 3.63°C/m; boiling point of pure chloroform = 61.20°C)

Chemistry: the Central Science

Atoms, Molecules, and Ions

Stoichiometry: Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

Cinnamaldehyde (132.16 g/mol) is used as a flavoring agent. What mass of cinnamaldehyde must be added to 175 g of ethanol to give a solution whose boiling point is 82.57°C? (For ethanol, K_b = 1.22°C/m; boiling point of pure ethanol = 78.37°C)

are properties that depend on the number of particles dissolved.

Which of the following compounds would be most likely to dissolve in CCl₄?

What is the osmotic pressure of a solution that contains 13.7 g of propyl alcohol (C₃H₇OH) dissolved in enough water to make 500. mL of solution at 27°C? (R = 0.08206 L • atm/K • mol)

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.

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? (For chloroform, K_b = 3.63°C/m; boiling point of pure chloroform = 61.20°C)