Question 1

H2SO4 is a weaker acid than H2SO3.

Accepted Answer

A) True 
 B)False

Question 2

What is the pH of a 0.253 M solution of ammonium chloride? Kb (NH3) = 1.2 × 10-5

Accepted Answer

A)  2.7 
B)  4.8 
C)  9.2 
D)  11.3 
E)  9.9 
A)  2.7 
B)  4.8 
C)  9.2 
D)  11.3 
E)  9.9

Question 3

What is the [OH-] of a solution prepared by dissolving 0.0912 g of hydrogen chloride in sufficient pure water to prepare 250.0 ml of solution?

Accepted Answer

A)  10-2 M 
B)  10-8 M 
C)  10-12 M 
D)  10-4 M 
E)  1.0 M 
A)  10-2 M 
B)  10-8 M 
C)  10-12 M 
D)  10-4 M 
E)  1.0 M

Question 4

What is the pH of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml of solution?

Accepted Answer

A)  2 
B)  6 
C)  10 
D)  12 
E)  14 
A)  2 
B)  6 
C)  10 
D)  12 
E)  14

Question 5

0.272 g of a monoprotic acid (Mw = 189 g/mol) is dissolved in water to produce 25.0 mL of a solution with pH = 4.93. Determine the ionization constant of the acid.

Accepted Answer

A)  4.1 × 10-8 
B)  1.4 × 10-10 
C)  2.1 × 10-4 
D)  2.8 × 10-7 
E)  2.4 × 10-9 
A)  4.1 × 10-8 
B)  1.4 × 10-10 
C)  2.1 × 10-4 
D)  2.8 × 10-7 
E)  2.4 × 10-9

Question 6

What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

Accepted Answer

A)  11.4 
B)  2.6 
C)  9.4 
D)  4.7 
E)  9.3 
A)  11.4 
B)  2.6 
C)  9.4 
D)  4.7 
E)  9.3

Question 7

What is the pH of a 0.475 M solution of sodium nitrite? Ka (nitrous acid) = 7.2 × 10-4

Accepted Answer

A)  8.58 
B)  8.41 
C)  12.27 
D)  5.42 
E)  5.59 
A)  8.58 
B)  8.41 
C)  12.27 
D)  5.42 
E)  5.59

Question 8

List the following acids in order of increasing strength: HBrO HIO HClO

Accepted Answer

A)  HIO < HClO < HBrO 
B)  HClO < HIO < HBrO 
C)  HBrO < HIO < HClO 
D)  HIO < HBrO < HClO 
E)  HClO< HBrO < HIO 
A)  HIO < HClO < HBrO 
B)  HClO < HIO < HBrO 
C)  HBrO < HIO < HClO 
D)  HIO < HBrO < HClO 
E)  HClO< HBrO < HIO

Question 9

List the following acids in order of increasing strength:
 H2SO4   &emsp; H2SeO4   &emsp; H2TeO4

Accepted Answer

A)  H2SeO4 2TeO4 2SO4 
B)  H2SeO4 2SO4 2TeO4 
C)  H2SO4 2TeO4 2SeO4 
D)  H2SO4 2SeO4 2TeO4 
E)  H2TeO4 2SeO4 2SO4 
A)  H2SeO4 2TeO4 2SO4 
B)  H2SeO4 2SO4 2TeO4 
C)  H2SO4 2TeO4 2SeO4 
D)  H2SO4 2SeO4 2TeO4 
E)  H2TeO4 2SeO4 2SO4

Question 10

Which of the following is a logical inference from the fact that a 0.10 molar solution of potassium acetate, KC2H3O2, is less alkaline than a 0.10 molar solution of potassium cyanide, KCN?

Accepted Answer

A)  Hydrocyanic acid is a weaker acid than acetic acid. 
B)  Cyanides are less soluble than acetates. 
C)  Hydrocyanic acid is less soluble in water than acetic acid. 
D)  Acetic acid is a weaker acid than hydrocyanic acid. 
E)  0.10 M potassium acetate is more concentrated than 0.10 M potassium cyanide. 
A)  Hydrocyanic acid is a weaker acid than acetic acid. 
B)  Cyanides are less soluble than acetates. 
C)  Hydrocyanic acid is less soluble in water than acetic acid. 
D)  Acetic acid is a weaker acid than hydrocyanic acid. 
E)  0.10 M potassium acetate is more concentrated than 0.10 M potassium cyanide.

Question 11

The first ionization step is approximately 100% for H2SO3.

Accepted Answer

A) True 
 B)False

Question 12

What is the [Cl-] of a solution prepared by dissolving 0.1824 g of hydrogen chloride in sufficient pure water to prepare 500.0 ml of solution?

Accepted Answer

A)  10-2 M 
B)  10-8 M 
C)  10-12 M 
D)  10-4 M 
E)  1.0 M 
A)  10-2 M 
B)  10-8 M 
C)  10-12 M 
D)  10-4 M 
E)  1.0 M

Question 13

Which of the following statements is NOT true?

Accepted Answer

A)  In liquid ammonia, the strongest possible base is the NH2- ion. 
B)  Ammonium hydroxide and acetic acid have equal ionization constants in water at 25 °C because of the leveling effect. 
C)  The second ionization constant of a diprotic acid is always smaller than the first ionization constant. 
D)  A Br∅nsted base may be any substance that can act as a proton acceptor. 
E)  Bases neutralize acids to form salts plus water. 
A)  In liquid ammonia, the strongest possible base is the NH2- ion. 
B)  Ammonium hydroxide and acetic acid have equal ionization constants in water at 25 °C because of the leveling effect. 
C)  The second ionization constant of a diprotic acid is always smaller than the first ionization constant. 
D)  A Br∅nsted base may be any substance that can act as a proton acceptor. 
E)  Bases neutralize acids to form salts plus water.

Question 14

A 0.214 M solution of a monoprotic base has a pH of 11.48. What is the ionization constant of this base?

Accepted Answer

A)  1.4 × 10-2 
B)  4.3 × 10-5 
C)  1.5 × 10-11 
D)  5.1 × 10-23 
E)  2.0 × 10-6 
A)  1.4 × 10-2 
B)  4.3 × 10-5 
C)  1.5 × 10-11 
D)  5.1 × 10-23 
E)  2.0 × 10-6

Question 15

For the following compound, predict whether the solution is acidic, basic or neutral and why: HI.

Accepted Answer

A)  acidic because HI is a strong acid 
B)  basic because HI is a weak base 
C)  neutral because there is no hydrolysis 
D)  basic because HI is the salt of a weak acid 
E)  acidic because HI is the salt of a weak base 
A)  acidic because HI is a strong acid 
B)  basic because HI is a weak base 
C)  neutral because there is no hydrolysis 
D)  basic because HI is the salt of a weak acid 
E)  acidic because HI is the salt of a weak base

Question 16

Which of the following is the strongest base?

Accepted Answer

A)  Cl- 
B)  ClO4- 
C)  F- 
D)  NO3- 
E)  H2O 
A)  Cl- 
B)  ClO4- 
C)  F- 
D)  NO3- 
E)  H2O

Question 17

Consider the reaction: HC2H3O2 + H2O ⇌ H3O+ + C2H3O2-
Choose the pair of substances that are both bases in the reaction.

Accepted Answer

A)  HC2H3O2 and H3O+ 
B)  H2O and C2H3O2- 
C)  H2O and H3O+ 
D)  HC2H3O2 and C2H3O2- 
E)  H3O+ and HC2H3O2 
A)  HC2H3O2 and H3O+ 
B)  H2O and C2H3O2- 
C)  H2O and H3O+ 
D)  HC2H3O2 and C2H3O2- 
E)  H3O+ and HC2H3O2

Question 18

For the following compound, predict whether the solution is acidic, basic or neutral and why: NaC2H3O2.

Accepted Answer

A)  acidic because NaC2H3O2 is a strong acid 
B)  basic because NaC2H3O2 is a weak base 
C)  neutral because there is no hydrolysis 
D)  basic because NaC2H3O2 is the salt of a weak acid 
E)  acidic because NaC2H3O2 is the salt of a weak base 
A)  acidic because NaC2H3O2 is a strong acid 
B)  basic because NaC2H3O2 is a weak base 
C)  neutral because there is no hydrolysis 
D)  basic because NaC2H3O2 is the salt of a weak acid 
E)  acidic because NaC2H3O2 is the salt of a weak base

Question 19

What is the pH of a 0.563 M solution of ammonium bromide? Kb (NH3) = 1.8 × 10-5

Accepted Answer

A)  2.50 
B)  11.50 
C)  4.75 
D)  4.63 
E)  9.25 
A)  2.50 
B)  11.50 
C)  4.75 
D)  4.63 
E)  9.25

Question 20

Br∅nsted and Lowry suggested that bases be defined as proton acceptors.

Accepted Answer

A) True 
 B)False

Exam 16: Acids and Bases

H2SO4 is a weaker acid than H2SO3.

What is the pH of a 0.253 M solution of ammonium chloride? Kb (NH3) = 1.2 × 10-5

What is the [OH-] of a solution prepared by dissolving 0.0912 g of hydrogen chloride in sufficient pure water to prepare 250.0 ml of solution?

What is the pH of a solution prepared by dissolving 0.140 g of potassium hydroxide in sufficient pure water to prepare 250.0 ml of solution?

0.272 g of a monoprotic acid (Mw = 189 g/mol) is dissolved in water to produce 25.0 mL of a solution with pH = 4.93. Determine the ionization constant of the acid.

What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10-10

What is the pH of a 0.475 M solution of sodium nitrite? Ka (nitrous acid) = 7.2 × 10-4

List the following acids in order of increasing strength: HBrO HIO HClO

List the following acids in order of increasing strength: H2SO4 H2SeO4 H2TeO4

Which of the following is a logical inference from the fact that a 0.10 molar solution of potassium acetate, KC2H3O2, is less alkaline than a 0.10 molar solution of potassium cyanide, KCN?

The first ionization step is approximately 100% for H2SO3.

What is the [Cl-] of a solution prepared by dissolving 0.1824 g of hydrogen chloride in sufficient pure water to prepare 500.0 ml of solution?

Which of the following statements is NOT true?

A 0.214 M solution of a monoprotic base has a pH of 11.48. What is the ionization constant of this base?

For the following compound, predict whether the solution is acidic, basic or neutral and why: HI.

Which of the following is the strongest base?

Consider the reaction: HC2H3O2 + H2O ⇌ H3O+ + C2H3O2- Choose the pair of substances that are both bases in the reaction.

For the following compound, predict whether the solution is acidic, basic or neutral and why: NaC2H3O2.

What is the pH of a 0.563 M solution of ammonium bromide? Kb (NH3) = 1.8 × 10-5

Br∅nsted and Lowry suggested that bases be defined as proton acceptors.

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

H₂SO₄ is a weaker acid than H₂SO₃.

What is the pH of a 0.253 M solution of ammonium chloride? Kb (NH₃) = 1.2 × 10^-5

What is the pH of a 0.570 M solution of aniline? Kb = 7.4 × 10^-10

What is the pH of a 0.475 M solution of sodium nitrite? Ka (nitrous acid) = 7.2 × 10^-4

List the following acids in order of increasing strength: H₂SO₄ H₂SeO₄ H₂TeO₄

Which of the following is a logical inference from the fact that a 0.10 molar solution of potassium acetate, KC₂H₃O₂, is less alkaline than a 0.10 molar solution of potassium cyanide, KCN?

The first ionization step is approximately 100% for H₂SO₃.

Consider the reaction: HC₂H₃O₂ + H₂O ⇌ H₃O⁺ + C₂H₃O₂^- Choose the pair of substances that are both bases in the reaction.

For the following compound, predict whether the solution is acidic, basic or neutral and why: NaC₂H₃O₂.

What is the pH of a 0.563 M solution of ammonium bromide? Kb (NH₃) = 1.8 × 10^-5