Question 1

Of the following acids, ________ is not a strong acid.

Accepted Answer

A) HNO2 
B) H2SO4 
C) HNO3 
D) HClO4 
E) HCl 
A) HNO2 
B) H2SO4 
C) HNO3 
D) HClO4 
E) HCl A

Question 2

The pH of a 0.15 M aqueous solution of NaZ (the sodium salt of HZ)is 10.7. What is the Ka for HZ?

Accepted Answer

A) 1.6 × 10-6 
B) 6.0 × 10-9 
C) 8.9 × 10-4 
D) 1.3 × 10-12  
E) 3.3 × 10-8 
A) 1.6 × 10-6 
B) 6.0 × 10-9 
C) 8.9 × 10-4 
D) 1.3 × 10-12  
E) 3.3 × 10-8 B

Question 3

The acid-dissociation constant, Ka, for gallic acid is 4.57 × 10-3. What is the base-dissociation constant, Kb, for the gallate ion?

Accepted Answer

A) 4.57 × 10-3 
B) 2.19 × 10-12 
C) 5.43 × 10-5 
D) 7.81 × 10-6 
E) 2.19 × 102 
A) 4.57 × 10-3 
B) 2.19 × 10-12 
C) 5.43 × 10-5 
D) 7.81 × 10-6 
E) 2.19 × 102 B

Question 4

In the gas phase reaction below, NH3 is acting as a(n)________ base but not as a(n)________ base.

Accepted Answer

A) Arrhenius, Br∅nsted-Lowry 
B) Br∅nsted-Lowry, Lewis 
C) Lewis, Arrhenius 
D) Lewis, Br∅nsted-Lowry 
E) Arrhenius, Lewis 
A) Arrhenius, Br∅nsted-Lowry 
B) Br∅nsted-Lowry, Lewis 
C) Lewis, Arrhenius 
D) Lewis, Br∅nsted-Lowry 
E) Arrhenius, Lewis

Question 5

The pH of a 0.10 M solution of a weak base is 9.82. What is the Kb for this base?

Accepted Answer

A) 2.1 × 10-4 
B) 4.4 × 10-8 
C) 8.8 × 10-8 
D) 6.6 × 10-4 
E) 2.0 × 10-5 
A) 2.1 × 10-4 
B) 4.4 × 10-8 
C) 8.8 × 10-8 
D) 6.6 × 10-4 
E) 2.0 × 10-5

Question 6

An aqueous solution of ________ will produce a basic solution.

Accepted Answer

A) Na2SO3 
B) RbBr 
C) Mg(ClO4)2 
D) NH4NO3 
E) KNO3 
A) Na2SO3 
B) RbBr 
C) Mg(ClO4)2 
D) NH4NO3 
E) KNO3

Question 7

Classify the following compounds as weak acids (W)or strong acids (S): benzoic acid nitric acid acetic acid

Accepted Answer

A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W 
A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W

Question 8

A 0.15 M aqueous solution of the weak base B at 25.0 °C has a pH of 8.88. The value of Kb for B is ________.

Accepted Answer

A) 3.0 × 10-5 
B) 1.8 × 10-5 
C) 3.9 × 10-10 
D) 1.3 × 10-10 
E) none of the above 
A) 3.0 × 10-5 
B) 1.8 × 10-5 
C) 3.9 × 10-10 
D) 1.3 × 10-10 
E) none of the above

Question 9

A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of Ka for HA is ________.

Accepted Answer

A) 3.0 × 10-5 
B) 1.8 × 10-5 
C) 7.1 × 10-9 
D) 1.3 × 10-10 
E) 3.3 × 104 
A) 3.0 × 10-5 
B) 1.8 × 10-5 
C) 7.1 × 10-9 
D) 1.3 × 10-10 
E) 3.3 × 104

Question 10

The conjugate acid of CH3NH2 is ________.

Accepted Answer

A) CH3NH2 
B) CH3NH3+ 
C) CH3NH2+ 
D) CH3NH+ 
E) none of the above 
A) CH3NH2 
B) CH3NH3+ 
C) CH3NH2+ 
D) CH3NH+ 
E) none of the above

Question 11

The acid-dissociation constants of sulfurous acid (H2SO3)are Ka1 = 1.7 × 10-2 and Ka2 = 6.4 × 10-8 at 25.0 °C. Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

Accepted Answer

A) 4.53 
B) 1.28 
C) 1.86 
D) 6.21 
E) 1.93 
A) 4.53 
B) 1.28 
C) 1.86 
D) 6.21 
E) 1.93

Question 12

Using the data in the table, which of the conjugate bases below is the strongest base?

Accepted Answer

A) OAc- 
B) CHO2- 
C) ClO- 
D) F- 
E) OAc- and CHO2- 
A) OAc- 
B) CHO2- 
C) ClO- 
D) F- 
E) OAc- and CHO2-

Question 13

Classify the following compounds as weak acids (W)or strong acids (S): nitrous acid hydrochloric acid hydrofluoric acid

Accepted Answer

A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W 
A) W W W 
B) S S S 
C) S W W 
D) W S S 
E) W S W

Question 14

Of the following, ________ is a weak acid.

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HNO3 
E) HClO4 
A) HF 
B) HCl 
C) HBr 
D) HNO3 
E) HClO4

Question 15

The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of Ka for HBrO?

Accepted Answer

A) 2.0 × 10-9 
B) 1.1 × 10-9 
C) 6.0 × 10-5 
D) 3.3 × 10-5 
E) 3.0 × 104 
A) 2.0 × 10-9 
B) 1.1 × 10-9 
C) 6.0 × 10-5 
D) 3.3 × 10-5 
E) 3.0 × 104

Question 16

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?

Accepted Answer

A) 2.0 × 10-9 
B) 1.1 × 10-9 
C) 6.0 × 10-5 
D) 3.5 × 10-4 
E) none of the above 
A) 2.0 × 10-9 
B) 1.1 × 10-9 
C) 6.0 × 10-5 
D) 3.5 × 10-4 
E) none of the above

Question 17

A 0.1 M solution of ________ has a pH of 7.0.

Accepted Answer

A) Na2S 
B) KF 
C) NaNO3 
D) NH4Cl 
E) NaF 
A) Na2S 
B) KF 
C) NaNO3 
D) NH4Cl 
E) NaF

Question 18

Of the following substances, an aqueous solution of ________ will form basic solutions. NaHS Cu(NO3)2 KHCO3 NaF

Accepted Answer

A) NaHS, Cu(NO3)2 
B) KHCO3, NaHS 
C) NaF only 
D) NaF, KHCO3 
E) NaHS, KHCO3 and NaF 
A) NaHS, Cu(NO3)2 
B) KHCO3, NaHS 
C) NaF only 
D) NaF, KHCO3 
E) NaHS, KHCO3 and NaF

Question 19

A 0.0035 M aqueous solution of a particular compound has pH = 2.46. The compound is ________.

Accepted Answer

A) a weak base 
B) a weak acid 
C) a strong acid 
D) a strong base 
E) a salt 
A) a weak base 
B) a weak acid 
C) a strong acid 
D) a strong base 
E) a salt

Question 20

An aqueous solution of ________ will produce a neutral solution.

Accepted Answer

A) LiNO3 
B) NaNO2 
C) KF 
D) Rb2CO3 
E) NH4NO3 
A) LiNO3 
B) NaNO2 
C) KF 
D) Rb2CO3 
E) NH4NO3

Exam 16: Acid-Base Equilibria

Of the following acids, ________ is not a strong acid.

The pH of a 0.15 M aqueous solution of NaZ (the sodium salt of HZ)is 10.7. What is the Ka for HZ?

The acid-dissociation constant, Ka, for gallic acid is 4.57 × 10-3. What is the base-dissociation constant, Kb, for the gallate ion?

In the gas phase reaction below, NH3 is acting as a(n)________ base but not as a(n)________ base.

The pH of a 0.10 M solution of a weak base is 9.82. What is the Kb for this base?

An aqueous solution of ________ will produce a basic solution.

Classify the following compounds as weak acids (W)or strong acids (S): benzoic acid nitric acid acetic acid

A 0.15 M aqueous solution of the weak base B at 25.0 °C has a pH of 8.88. The value of Kb for B is ________.

A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of Ka for HA is ________.

The conjugate acid of CH3NH2 is ________.

The acid-dissociation constants of sulfurous acid (H2SO3)are Ka1 = 1.7 × 10-2 and Ka2 = 6.4 × 10-8 at 25.0 °C. Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

Using the data in the table, which of the conjugate bases below is the strongest base?

Classify the following compounds as weak acids (W)or strong acids (S): nitrous acid hydrochloric acid hydrofluoric acid

Of the following, ________ is a weak acid.

The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of Ka for HBrO?

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?

A 0.1 M solution of ________ has a pH of 7.0.

Of the following substances, an aqueous solution of ________ will form basic solutions. NaHS Cu(NO3)2 KHCO3 NaF

A 0.0035 M aqueous solution of a particular compound has pH = 2.46. The compound is ________.

An aqueous solution of ________ will produce a neutral solution.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

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 pH of a 0.15 M aqueous solution of NaZ (the sodium salt of HZ)is 10.7. What is the K_a for HZ?

The acid-dissociation constant, K_a, for gallic acid is 4.57 × 10^-3. What is the base-dissociation constant, K_b, for the gallate ion?

In the gas phase reaction below, NH₃ is acting as a(n) base but not as a(n) base.

The pH of a 0.10 M solution of a weak base is 9.82. What is the K_b for this base?

A 0.15 M aqueous solution of the weak base B at 25.0 °C has a pH of 8.88. The value of K_b for B is ________.

A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of K_a for HA is ________.

The conjugate acid of CH₃NH₂ is ________.

The acid-dissociation constants of sulfurous acid (H₂SO₃)are K_a1= 1.7 × 10^-2 and K_a2= 6.4 × 10^-⁸ at 25.0 °C. Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.

The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of K_a for HBrO?

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of K_a for HF?

Of the following substances, an aqueous solution of ________ will form basic solutions. NaHS Cu(NO₃)₂ KHCO₃ NaF