Question 1

Which aqueous solution has 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 2

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH)2 solution?

Accepted Answer

A)  0.50 × 10-3 M 
B)  1.0 × 10-3 M 
C)  2.0 × 10-3 M 
D)  1.0 × 10-2 M 
E)  3.3 × 10-4 M 
A)  0.50 × 10-3 M 
B)  1.0 × 10-3 M 
C)  2.0 × 10-3 M 
D)  1.0 × 10-2 M 
E)  3.3 × 10-4 M

Question 3

HCN is classified as a weak acid in water. What does this classification mean?

Accepted Answer

A relatively small f

Question 4

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4, Ka2 = 5.6 × 10-8, and Ka3 = 3 × 10-13. What is the pH of a 0.500 M solution of arsenic acid?

Accepted Answer

A)  0.85 
B)  1.95 
C)  3.90 
D)  4.51 
E)  None of these choices is correct. 
A)  0.85 
B)  1.95 
C)  3.90 
D)  4.51 
E)  None of these choices is correct.

Question 5

Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.)   What is the pH of the solution?

Accepted Answer

A)  2.4 
B)  3.0 
C)  2.1 
D)  11.0 
E)  11.6 
A)  2.4 
B)  3.0 
C)  2.1 
D)  11.0 
E)  11.6

Question 6

Which of the following species can act as a Lewis acid?

Accepted Answer

A)  NH3 
B)  F- 
C)  H2O 
D)  NH4+ 
E)  BF3 
A)  NH3 
B)  F- 
C)  H2O 
D)  NH4+ 
E)  BF3

Question 7

The following is the correct order for the acid strength for these oxoacids. HClO > HClO2 > HClO3 > HClO4

Accepted Answer

A) True 
 B)False

Question 8

Which is the formula for the hydronium ion?

Accepted Answer

A)  OH- 
B)  H2O 
C)  H3O+ 
D)  H3O- 
E)  H2O+ 
A)  OH- 
B)  H2O 
C)  H3O+ 
D)  H3O- 
E)  H2O+

Question 9

What is the name given to a substance that can act as a Brønsted acid or as a Brønsted base according to what it is reacting with?

Accepted Answer

A)  hydrophilic 
B)  hydrophobic 
C)  amphoteric 
D)  isoprotic 
E)  isoelectronic 
A)  hydrophilic 
B)  hydrophobic 
C)  amphoteric 
D)  isoprotic 
E)  isoelectronic

Question 10

All strong acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False

Question 11

Which is an acidic oxide?

Accepted Answer

A)  P4O10 
B)  MgO 
C)  Fe2O3 
D)  K2O 
E)  Cr2O3 
A)  P4O10 
B)  MgO 
C)  Fe2O3 
D)  K2O 
E)  Cr2O3

Question 12

Acid strength decreases in the series HI > HSO4-> HF > HCN. Which of these anions is the weakest base?

Accepted Answer

A)  I- 
B)  SO42- 
C)  F- 
D)  CN- 
A)  I- 
B)  SO42- 
C)  F- 
D)  CN-

Question 13

Amphoteric oxides exhibit both acidic and basic properties.

Accepted Answer

A) True 
 B)False

Question 14

A(n) ________ can be added to a solution to increase the pH of the solution.

Accepted Answer

The answer of A(n) ________ can be added to a...

Question 15

The most basic oxides are formed from elements found in the ________ region of the periodic table.

Accepted Answer

A)  upper right 
B)  upper left 
C)  center 
D)  lower right 
E)  lower left 
A)  upper right 
B)  upper left 
C)  center 
D)  lower right 
E)  lower left

Question 16

What is the pH of a 0.014 M Ca(OH)2 solution?

Accepted Answer

A)  1.85 
B)  1.55 
C)  12.15 
D)  12.45 
E)  15.85 
A)  1.85 
B)  1.55 
C)  12.15 
D)  12.45 
E)  15.85

Question 17

Which diagram best represents the products when equimolar amounts of HF(g) and NH3(g) react?

Accepted Answer

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

Question 18

A hydrohalic acid is a binary acid containing a halogen.

Accepted Answer

A) True 
 B)False

Question 19

What is the conjugate acid of NH3?

Accepted Answer

A)  NH2 
B)  NH2+ 
C)  NH2- 
D)  NH4 
E)  NH4+ 
A)  NH2 
B)  NH2+ 
C)  NH2- 
D)  NH4 
E)  NH4+

Question 20

Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L.)   What is the autoionization constant for HX?

Accepted Answer

A)  4.9 ×10-2 
B)  4.0 ×10-3 
C)  4.4 ×10-4 
D)  4.0 ×10-6 
E)  2.5 ×105 
A)  4.9 ×10-2 
B)  4.0 ×10-3 
C)  4.4 ×10-4 
D)  4.0 ×10-6 
E)  2.5 ×105

Exam 16: Acids and Bases

Which aqueous solution has the highest pH?

What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH)2 solution?

HCN is classified as a weak acid in water. What does this classification mean?

Farmers who raise cotton once used arsenic acid, H3AsO4, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4, Ka2 = 5.6 × 10-8, and Ka3 = 3 × 10-13. What is the pH of a 0.500 M solution of arsenic acid?

Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.) What is the pH of the solution?

Which of the following species can act as a Lewis acid?

The following is the correct order for the acid strength for these oxoacids. HClO > HClO2 > HClO3 > HClO4

Which is the formula for the hydronium ion?

What is the name given to a substance that can act as a Brønsted acid or as a Brønsted base according to what it is reacting with?

All strong acids have weak conjugate bases.

Which is an acidic oxide?

Acid strength decreases in the series HI > HSO4-> HF > HCN. Which of these anions is the weakest base?

Amphoteric oxides exhibit both acidic and basic properties.

A(n) ________ can be added to a solution to increase the pH of the solution.

The most basic oxides are formed from elements found in the ________ region of the periodic table.

What is the pH of a 0.014 M Ca(OH)2 solution?

Which diagram best represents the products when equimolar amounts of HF(g) and NH3(g) react?

A hydrohalic acid is a binary acid containing a halogen.

What is the conjugate acid of NH3?

Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10-3 mol of atoms, and the volume of the box is 1.0 L.) What is the autoionization constant for HX?

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

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

Electrochemistry

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Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

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What is the concentration of OH^- in a 1.0 × 10^-3^MBa(OH)₂ solution?

Farmers who raise cotton once used arsenic acid, H₃AsO₄, as a defoliant at harvest time. Arsenic acid is a polyprotic acid with K_a1 = 2.5 × 10^-4, K_a2 = 5.6 × 10^-8, and K_a3 = 3 × 10^-13. What is the pH of a 0.500 M solution of arsenic acid?

Below is a representation of an aqueous solution of a weak acid HA at equilibrium. (Each circle represents 1.0 ×10^-3 mol of atoms, and the volume of the box is 1.0 L. Solvent water molecules are not shown for clarity.) What is the pH of the solution?

The following is the correct order for the acid strength for these oxoacids. HClO > HClO₂ > HClO₃ > HClO₄

Acid strength decreases in the series HI > HSO₄^-> HF > HCN. Which of these anions is the weakest base?

What is the pH of a 0.014 M Ca(OH)₂ solution?

Which diagram best represents the products when equimolar amounts of HF(g) and NH₃(g) react?

What is the conjugate acid of NH₃?

Below is a representation of pure liquid HX, an amphoteric substance, at equilibrium. (Each circle represents 1.0 ×10^-3 mol of atoms, and the volume of the box is 1.0 L.) What is the autoionization constant for HX?