Question 1

The magnitudes of Kf and of Kb depend on the identity of the ________.

Accepted Answer

A) solute 
B) solvent 
C) solution 
D) solvent and on temperature 
E) solute and solvent 
A) solute 
B) solvent 
C) solution 
D) solvent and on temperature 
E) solute and solvent

Question 2

A solution contains 15 ppm of benzene.The density of the solution is   This means that ________.

Accepted Answer

A) there are 15 mg of benzene in 1.0 g of this solution 
B) 100 g of the solution contains 15 g of benzene 
C) 1.0 g of the solution contains 15 × 10-6 g of benzene 
D) 1.0 L of the solution contains 15 g of benzene 
E) the solution is 15% by mass of benzene 
A) there are 15 mg of benzene in 1.0 g of this solution 
B) 100 g of the solution contains 15 g of benzene 
C) 1.0 g of the solution contains 15 × 10-6 g of benzene 
D) 1.0 L of the solution contains 15 g of benzene 
E) the solution is 15% by mass of benzene

Question 3

On a clear day at sea level,with a temperature of 25 °C,the partial pressure of   in air is 0.78 atm and the concentration of nitrogen in water is   When the partial pressure of   is ________ atm,the concentration in water is 2.0

Accepted Answer

A) 0.63 
B) 0.68 
C) 1.0 
D) 3.0 
E) 2.9 
A) 0.63 
B) 0.68 
C) 1.0 
D) 3.0 
E) 2.9

Question 4

Which of the following substances is least likely to dissolve in water?

Accepted Answer

A) HOCH2CH2OH 
B) CHCl3 
C) O   CH3(CH2)9CH 
D) CH3(CH2)8CH2OH 
E) CCl4 
A) HOCH2CH2OH 
B) CHCl3 
C) O   CH3(CH2)9CH 
D) CH3(CH2)8CH2OH 
E) CCl4

Question 5

An unsaturated solution is one that ________.

Accepted Answer

A) has no double bonds 
B) contains the maximum concentration of solute possible, and is in equilibrium with undissolved solute 
C) has a concentration lower than the solubility limit 
D) contains more dissolved solute than the solubility allows 
E) contains no solute 
A) has no double bonds 
B) contains the maximum concentration of solute possible, and is in equilibrium with undissolved solute 
C) has a concentration lower than the solubility limit 
D) contains more dissolved solute than the solubility allows 
E) contains no solute

Question 6

An acetic acid aqueous solution contains 22% by mass acetic acid? Which of the following statements is correct?

Accepted Answer

A) 1 mL of this solution contains 22 g of acetic acid 
B) 1 L of this solution has a mass of 22 g 
C) 100 g of this solution contains 22 g of acetic acid 
D) 1 L of this solution contains 22 mL of acetic acid 
E) the density of this solution is 2.2 g/mL 
A) 1 mL of this solution contains 22 g of acetic acid 
B) 1 L of this solution has a mass of 22 g 
C) 100 g of this solution contains 22 g of acetic acid 
D) 1 L of this solution contains 22 mL of acetic acid 
E) the density of this solution is 2.2 g/mL

Question 7

A solution is prepared by dissolving 27.7 g of Ca   in 375 g of water.The density of the resulting solution is 1.05 g/mL.The concentration of Ca   is ________% by mass.

Accepted Answer

A) 6.88 
B) 7.22 
C) 0.0722 
D) 0.0688 
E) 6.24 
A) 6.88 
B) 7.22 
C) 0.0722 
D) 0.0688 
E) 6.24

Question 8

If the partial pressure of oxygen in the air a diver breathes is too great,________.

Accepted Answer

A) respiratory tissue is damaged by oxidation 
B) hyperventilation results 
C) the urge to breathe is increased and excessive CO2 is removed from the body 
D) the urge to breathe is reduced and not enough CO2 is removed from the body 
E) No problems result from this situation. 
A) respiratory tissue is damaged by oxidation 
B) hyperventilation results 
C) the urge to breathe is increased and excessive CO2 is removed from the body 
D) the urge to breathe is reduced and not enough CO2 is removed from the body 
E) No problems result from this situation.

Question 9

A mixture containing 41.0 g of an unknown nonelectrolyte and 160.0 g of water has a freezing point of -1.34 °C.Given   for water,what is the molecular weight (g/mol)of the unknown solute?

Accepted Answer

A) 57.0 
B) 356 
C) 0.720 
D) 4.74 
E) 0.355 
A) 57.0 
B) 356 
C) 0.720 
D) 4.74 
E) 0.355

Question 10

Colligative properties of solutions include all of the following except ________.

Accepted Answer

A) depression of vapor pressure upon addition of a solute to a solvent 
B) elevation of the boiling point of a solution upon addition of a solute to a solvent 
C) depression of the freezing point of a solution upon addition of a solute to a solvent 
D) an increase in the osmotic pressure of a solution upon the addition of more solute 
E) the increase of reaction rates with increase in temperature 
A) depression of vapor pressure upon addition of a solute to a solvent 
B) elevation of the boiling point of a solution upon addition of a solute to a solvent 
C) depression of the freezing point of a solution upon addition of a solute to a solvent 
D) an increase in the osmotic pressure of a solution upon the addition of more solute 
E) the increase of reaction rates with increase in temperature

Question 11

Which one of the following is most soluble in water?

Accepted Answer

A) CH3OH 
B) CH3CH2CH2OH 
C) CH3CH2OH 
D) CH3CH2CH2CH2OH 
E) CH3CH2CH2CH2CH2OH 
A) CH3OH 
B) CH3CH2CH2OH 
C) CH3CH2OH 
D) CH3CH2CH2CH2OH 
E) CH3CH2CH2CH2CH2OH

Question 12

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water.The density of the resulting solution is   .The concentration of Cl- in this solution is ________ M.

Accepted Answer

A) 0.214 
B) 0.562 
C) 1.12 
D) 1.20 
E) 6.64 × 10-2 
A) 0.214 
B) 0.562 
C) 1.12 
D) 1.20 
E) 6.64 × 10-2

Question 13

A 30.0 g sample of potassium nitrate is dissolved in 100 g of water at 60 °C.The solution is cooled to 20.0 °C and a small amount of precipitate is observed.This solution is ________.

Accepted Answer

A) hydrated 
B) placated 
C) saturated 
D) unsaturated 
E) supersaturated 
A) hydrated 
B) placated 
C) saturated 
D) unsaturated 
E) supersaturated

Question 14

The mole fraction of He in a gaseous solution prepared from 1.0 g of He,6.5 g of Ar,and 10.0 g of Ne is ________.

Accepted Answer

A) 0.28 
B) 0.25 
C) 0.20 
D) 0.66 
E) 0.86 
A) 0.28 
B) 0.25 
C) 0.20 
D) 0.66 
E) 0.86

Question 15

What is the mole fraction of N   in a solution prepared by dissolving 16.0 g of N   in 250.0 g of water? The density of the resulting solution is 0.974 g/mL.

Accepted Answer

A) 0.0640 
B) 0.940 
C) 0.0635 
D) 0.922 
E) 16.8 
A) 0.0640 
B) 0.940 
C) 0.0635 
D) 0.922 
E) 16.8

Question 16

A solution contains 11% by mass of sodium chloride.This means that ________.

Accepted Answer

A) there are 11 g of sodium chloride in in 1.0 mL of this solution 
B) 100 g of the solution contains 11 g of sodium chloride 
C) 100 mL of the solution contains 11 g of sodium chloride 
D) the density of the solution is 11 g/mL 
E) the molality of the solution is 11 
A) there are 11 g of sodium chloride in in 1.0 mL of this solution 
B) 100 g of the solution contains 11 g of sodium chloride 
C) 100 mL of the solution contains 11 g of sodium chloride 
D) the density of the solution is 11 g/mL 
E) the molality of the solution is 11

Question 17

A solution is prepared by dissolving 0.60 g of nicotine (a nonelectrolyte)in water to make 12 mL of solution.The osmotic pressure of the solution is   at 25 °C.The molecular weight of nicotine is

Accepted Answer

A) 28 
B) 43 
C) 50 
D) 160 
E) 0.60 
A) 28 
B) 43 
C) 50 
D) 160 
E) 0.60

Question 18

Calculate the molarity of a 17.5% (by mass)aqueous solution of nitric acid.

Accepted Answer

A) 0.274 m 
B) 2.74 m 
C) 3.04 m 
D) 4.33 m 
E) The density of the solution is needed to solve the problem. 
A) 0.274 m 
B) 2.74 m 
C) 3.04 m 
D) 4.33 m 
E) The density of the solution is needed to solve the problem.

Question 19

A 17.2 g sample of potassium chlorate is dissolved in 250 g of water at 65 °C.The solution is cooled to 30.0 °C and no precipitate is observed.This solution is ________.

Accepted Answer

A) hydrated 
B) miscible 
C) saturated 
D) unsaturated 
E) supersaturated 
A) hydrated 
B) miscible 
C) saturated 
D) unsaturated 
E) supersaturated

Question 20

The ratio of the actual value of a colligative property to the value calculated,assuming the substance to be a nonelectrolyte,is referred to as ________.

Accepted Answer

A) Henry's law 
B) vapor pressure lowering 
C) the van't Hoff factor 
D) freezing point depression 
E) osmotic pressure 
A) Henry's law 
B) vapor pressure lowering 
C) the van't Hoff factor 
D) freezing point depression 
E) osmotic pressure

Exam 13: Properties of Solutions

The magnitudes of Kf and of Kb depend on the identity of the ________.

A solution contains 15 ppm of benzene.The density of the solution is This means that ________.

On a clear day at sea level,with a temperature of 25 °C,the partial pressure of in air is 0.78 atm and the concentration of nitrogen in water is When the partial pressure of is ________ atm,the concentration in water is 2.0

Which of the following substances is least likely to dissolve in water?

An unsaturated solution is one that ________.

An acetic acid aqueous solution contains 22% by mass acetic acid? Which of the following statements is correct?

A solution is prepared by dissolving 27.7 g of Ca in 375 g of water.The density of the resulting solution is 1.05 g/mL.The concentration of Ca is ________% by mass.

If the partial pressure of oxygen in the air a diver breathes is too great,________.

A mixture containing 41.0 g of an unknown nonelectrolyte and 160.0 g of water has a freezing point of -1.34 °C.Given for water,what is the molecular weight (g/mol)of the unknown solute?

Colligative properties of solutions include all of the following except ________.

Which one of the following is most soluble in water?

A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water.The density of the resulting solution is .The concentration of Cl- in this solution is ________ M.

A 30.0 g sample of potassium nitrate is dissolved in 100 g of water at 60 °C.The solution is cooled to 20.0 °C and a small amount of precipitate is observed.This solution is ________.

The mole fraction of He in a gaseous solution prepared from 1.0 g of He,6.5 g of Ar,and 10.0 g of Ne is ________.

What is the mole fraction of N in a solution prepared by dissolving 16.0 g of N in 250.0 g of water? The density of the resulting solution is 0.974 g/mL.

A solution contains 11% by mass of sodium chloride.This means that ________.

A solution is prepared by dissolving 0.60 g of nicotine (a nonelectrolyte)in water to make 12 mL of solution.The osmotic pressure of the solution is at 25 °C.The molecular weight of nicotine is

Calculate the molarity of a 17.5% (by mass)aqueous solution of nitric acid.

A 17.2 g sample of potassium chlorate is dissolved in 250 g of water at 65 °C.The solution is cooled to 30.0 °C and no precipitate is observed.This solution is ________.

The ratio of the actual value of a colligative property to the value calculated,assuming the substance to be a nonelectrolyte,is referred to as ________.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The magnitudes of K_f and of K_b depend on the identity of the ________.

A solution is prepared by dissolving 23.7 g of CaCl₂ in 375 g of water.The density of the resulting solution is .The concentration of Cl^- in this solution is ________ M.