Question 1

An aqueous solution is considered to be acidic if

Accepted Answer

A)  the hydroxide ion concentration is 10¯6 M. 
B)  the hydrogen ion concentration is 10¯8 M. 
C)  the hydroxide and hydrogen ion concentrations are equal. 
D)  the hydroxide ion concentration is greater than the hydrogen ion concentration. 
E)  the hydroxide ion concentration is 10¯10 M. 
A)  the hydroxide ion concentration is 10¯6 M. 
B)  the hydrogen ion concentration is 10¯8 M. 
C)  the hydroxide and hydrogen ion concentrations are equal. 
D)  the hydroxide ion concentration is greater than the hydrogen ion concentration. 
E)  the hydroxide ion concentration is 10¯10 M.

Question 2

Iodine trichloride, ICl3, will react with a chloride ion to form ICl4¯. Which species, if any, acts as a Lewis acid in this reaction?

Accepted Answer

A)  ICl4¯ 
B)  ICl3 
C)  Cl¯ 
D)  the solvent 
E)  None of the species acts as a Lewis acid in this reaction. 
A)  ICl4¯ 
B)  ICl3 
C)  Cl¯ 
D)  the solvent 
E)  None of the species acts as a Lewis acid in this reaction.

Question 3

What is the pH of a 0.050 M LiOH solution?

Accepted Answer

A)  < 1.0 
B)  1.30 
C)  3.00 
D)  11.00 
E)  12.70 
A)  < 1.0 
B)  1.30 
C)  3.00 
D)  11.00 
E)  12.70

Question 4

Which of the following is the strongest acid?

Accepted Answer

A)  CH3COOH 
B)  HF 
C)  H3PO4 
D)  H2SO3 
E)  H2SO4 
A)  CH3COOH 
B)  HF 
C)  H3PO4 
D)  H2SO3 
E)  H2SO4

Question 5

(p. 812 and other sections) Which of the following aqueous liquids will have the highest pH?

Accepted Answer

A)  0.1 M CH3COOH, pKa = 4.7 
B)  0.1 M CuCl2, pKa = 7.5 
C)  0.1 M H3C6H5O7, pKa = 3.1 
D)  0.1 M ZnCl2, pKa = 9.0 
E)  pure water 
A)  0.1 M CH3COOH, pKa = 4.7 
B)  0.1 M CuCl2, pKa = 7.5 
C)  0.1 M H3C6H5O7, pKa = 3.1 
D)  0.1 M ZnCl2, pKa = 9.0 
E)  pure water

Question 6

Which of the following is a Lewis base?

Accepted Answer

A)  BCl3 
B)  Cu2+ 
C)  Cl¯ 
D)  Mn2+ 
E)  NH4+ 
A)  BCl3 
B)  Cu2+ 
C)  Cl¯ 
D)  Mn2+ 
E)  NH4+

Question 7

The substance NH3 is considered

Accepted Answer

A)  a weak acid. 
B)  a weak base. 
C)  a strong acid. 
D)  a strong base. 
E)  a neutral compound. 
A)  a weak acid. 
B)  a weak base. 
C)  a strong acid. 
D)  a strong base. 
E)  a neutral compound.

Question 8

Formic acid, which is a component of insect venom, has a Ka = 1.8 * 10¯4. What is the [H3O+] in a solution that is initially 0.10 M formic acid, HCOOH?

Accepted Answer

A)  4.2 * 10¯3 M 
B)  8.4 * 10¯3 M 
C)  1.8 * 10¯4 M 
D)  1.8 * 10¯5 M 
E)  1.8 * 10¯6 M 
A)  4.2 * 10¯3 M 
B)  8.4 * 10¯3 M 
C)  1.8 * 10¯4 M 
D)  1.8 * 10¯5 M 
E)  1.8 * 10¯6 M

Question 9

The substance H2SO3 is considered

Accepted Answer

A)  a weak Arrhenius base. 
B)  a strong Arrhenius acid. 
C)  a strong Arrhenius base. 
D)  a neutral compound. 
E)  a weak Arrhenius acid. 
A)  a weak Arrhenius base. 
B)  a strong Arrhenius acid. 
C)  a strong Arrhenius base. 
D)  a neutral compound. 
E)  a weak Arrhenius acid.

Question 10

The substance NaNO3 is considered

Accepted Answer

A)  a weak Arrhenius acid. 
B)  a weak Arrhenius base. 
C)  a strong Arrhenius acid. 
D)  a strong Arrhenius base. 
E)  a neutral compound. 
A)  a weak Arrhenius acid. 
B)  a weak Arrhenius base. 
C)  a strong Arrhenius acid. 
D)  a strong Arrhenius base. 
E)  a neutral compound.

Question 11

All weak acids have strong conjugate bases.

Accepted Answer

A) True 
 B)False

Question 12

Which, if any, of the following acids is strong?

Accepted Answer

A)  phosphoric 
B)  carbonic 
C)  acetic 
D)  water 
E)  None of these choices is correct. 
A)  phosphoric 
B)  carbonic 
C)  acetic 
D)  water 
E)  None of these choices is correct.

Question 13

All strong acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False

Question 14

Which one of the following pairs is not a conjugate acid-base pair?

Accepted Answer

A)  H2O, OH¯ 
B)  H2O2, HO2¯ 
C)  OH¯, O2¯ 
D)  H2PO4¯, HPO42¯ 
E)  HCl, H+ 
A)  H2O, OH¯ 
B)  H2O2, HO2¯ 
C)  OH¯, O2¯ 
D)  H2PO4¯, HPO42¯ 
E)  HCl, H+

Question 15

Select the strongest acid from the following list.

Accepted Answer

A)  HBrO 
B)  HBrO2 
C)  HClO2 
D)  HClO3 
E)  HIO 
A)  HBrO 
B)  HBrO2 
C)  HClO2 
D)  HClO3 
E)  HIO

Question 16

What is the pOH of a 0.0250 M HI solution?

Accepted Answer

A)  0.944 
B)  1.602 
C)  12.398 
D)  13.056 
E)  None of these choices is correct. 
A)  0.944 
B)  1.602 
C)  12.398 
D)  13.056 
E)  None of these choices is correct.

Question 17

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A)  0.12 
B)  0.29 
C)  0.63 
D)  0.82 
E)  > 1.0 
A)  0.12 
B)  0.29 
C)  0.63 
D)  0.82 
E)  > 1.0

Question 18

Consider the reaction: BF3 + F¯ $\rightarrow$ BF4¯
Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

Accepted Answer

Yes, according to Lewis, this

Question 19

What is the [H3O+] for a solution at 25 $\degree$C that has pOH = 5.640?

Accepted Answer

A)  2.34 *10¯4 M 
B)  2.29 * 10¯6 M 
C)  4.37 * 10¯9 M 
D)  4.27 * 10¯11 M 
E)  8.360 M 
A)  2.34 *10¯4 M 
B)  2.29 * 10¯6 M 
C)  4.37 * 10¯9 M 
D)  4.27 * 10¯11 M 
E)  8.360 M

Question 20

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Accepted Answer

A)  CH3NH2 
B)  NaOH 
C)  CO2 
D)  Ca(OH)2 
E)  CH4 
A)  CH3NH2 
B)  NaOH 
C)  CO2 
D)  Ca(OH)2 
E)  CH4

Exam 18: Acid-Base Equilibria

An aqueous solution is considered to be acidic if

Iodine trichloride, ICl3, will react with a chloride ion to form ICl4¯. Which species, if any, acts as a Lewis acid in this reaction?

What is the pH of a 0.050 M LiOH solution?

Which of the following is the strongest acid?

(p. 812 and other sections) Which of the following aqueous liquids will have the highest pH?

Which of the following is a Lewis base?

The substance NH3 is considered

Formic acid, which is a component of insect venom, has a Ka = 1.8 * 10¯4. What is the [H3O+] in a solution that is initially 0.10 M formic acid, HCOOH?

The substance H2SO3 is considered

The substance NaNO3 is considered

All weak acids have strong conjugate bases.

Which, if any, of the following acids is strong?

All strong acids have weak conjugate bases.

Which one of the following pairs is not a conjugate acid-base pair?

Select the strongest acid from the following list.

What is the pOH of a 0.0250 M HI solution?

What is the pH of a 0.75 M HNO3 solution?

Consider the reaction: BF3 + F¯ →\rightarrow→ BF4¯ Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

What is the [H3O+] for a solution at 25 °\degree° C that has pOH = 5.640?

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Iodine trichloride, ICl₃, will react with a chloride ion to form ICl₄¯. Which species, if any, acts as a Lewis acid in this reaction?

The substance NH₃ is considered

Formic acid, which is a component of insect venom, has a K_a = 1.8 * 10¯⁴. What is the [H₃O⁺] in a solution that is initially 0.10 M formic acid, HCOOH?

The substance H₂SO₃ is considered

The substance NaNO₃ is considered

What is the pH of a 0.75 M HNO₃ solution?

Consider the reaction: BF₃ + F¯ $\rightarrow$ BF₄¯ Can this ever be considered to be an acid-base reaction? Support your answer with appropriate arguments.

What is the [H₃O⁺] for a solution at 25 $\degree$ C that has pOH = 5.640?