Question 1

Calculate the pH of a solution containing 0.20 g of NaOH in 2.000L of solution.

Accepted Answer

The answer of Calculate the pH of a solution containing...

Question 2

What is the conjugate base of sulfuric acid?

Accepted Answer

A)  HSO4- 
B)  H3O+ 
C)  OH- 
D)  SO42- 
E)  H3SO4+ 
A)  HSO4- 
B)  H3O+ 
C)  OH- 
D)  SO42- 
E)  H3SO4+

Question 3

Carboxylic acids are ________.

Accepted Answer

A)  always weak acids 
B)  weak or strong acids depending on the number of carbons in the structure 
C)  always weak bases 
D)  inorganic acids 
A)  always weak acids 
B)  weak or strong acids depending on the number of carbons in the structure 
C)  always weak bases 
D)  inorganic acids

Question 4

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42-   H2CO3 + PO43-

Accepted Answer

A)  H2O 
B)  HCO3- 
C)  H2CO3 
D)  PO43- 
E)  None of these 
A)  H2O 
B)  HCO3- 
C)  H2CO3 
D)  PO43- 
E)  None of these

Question 5

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Accepted Answer

A)  0.36 
B)  2.4 × 10-2 
C)  7.8 × 10-3 
D)  1.5 × 10-5 
E)  1.9 × 10-3 
A)  0.36 
B)  2.4 × 10-2 
C)  7.8 × 10-3 
D)  1.5 × 10-5 
E)  1.9 × 10-3

Question 6

Give the two factors that influence the extent to which an acid undergoes ionization.

Accepted Answer

1. The strength of the bond be

Question 7

What is the pH of a 0.056 M HNO3 solution?

Accepted Answer

A)  0.056 
B)  1.25 
C)  12.75 
D)  2.88 
E)  11.11 
A)  0.056 
B)  1.25 
C)  12.75 
D)  2.88 
E)  11.11

Question 8

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

Accepted Answer

A)  100% 
B)  50% 
C)  25% 
D)  12.5% 
E)  Cannot be calculated without knowledge of Ka 
A)  100% 
B)  50% 
C)  25% 
D)  12.5% 
E)  Cannot be calculated without knowledge of Ka

Question 9

Which is a Lewis acid?

Accepted Answer

A)  CH3NH2 
B)  BCl3 
C)  F- 
D)  BF4- 
E)  CH4 
A)  CH3NH2 
B)  BCl3 
C)  F- 
D)  BF4- 
E)  CH4

Question 10

For H3PO4, Ka1 = 7.3 × 10-3, Ka2 = 6.2 × 10-6, and Ka3 = 4.8 × 10-13. A 0.10 M aqueous solution of NaH2PO4 therefore would be ________.

Accepted Answer

A)  neutral 
B)  weakly basic 
C)  weakly acidic 
D)  strongly acidic 
E)  strongly basic 
A)  neutral 
B)  weakly basic 
C)  weakly acidic 
D)  strongly acidic 
E)  strongly basic

Question 11

Which is the strongest acid?

Accepted Answer

A)  SO42- 
B)  H2SO3 
C)  H2SO4 
D)  HSO4- 
E)  HSO3- 
A)  SO42- 
B)  H2SO3 
C)  H2SO4 
D)  HSO4- 
E)  HSO3-

Question 12

The substance HClO4 is considered to be

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 13

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is weakly acidic. 
D)  The solution is strongly acidic. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is weakly acidic. 
D)  The solution is strongly acidic. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Question 14

Which of the following is the correct equilibrium expression for the autoionization of water?

Accepted Answer

A)  Kw = [H2O]2 
B)    
C)  Kw = [OH][H3O] 
D)  Kw = [OH-][H3O+] 
E)    
A)  Kw = [H2O]2 
B)    
C)  Kw = [OH][H3O] 
D)  Kw = [OH-][H3O+] 
E)

Question 15

Hydroxylamine, HONH2, readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps. Hydroxylamine has Kb = 9.1 × 10-9. What is the pH of a 0.025 M HONH2 solution?

Accepted Answer

A)  2.90 
B)  4.82 
C)  9.18 
D)  9.91 
E)  11.10 
A)  2.90 
B)  4.82 
C)  9.18 
D)  9.91 
E)  11.10

Question 16

Which is a Lewis acid but not a Brønsted acid?

Accepted Answer

A)  Fe3+ 
B)  H3O+ 
C)  HSO4- 
D)  NH3 
E)  H2O 
A)  Fe3+ 
B)  H3O+ 
C)  HSO4- 
D)  NH3 
E)  H2O

Question 17

A solution is prepared by adding 0.10 mol of potassium chloride, KCl, to 1.00 L of water. Which statement about the solution is correct?

Accepted Answer

A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  The solution is a strong oxidant. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made. 
A)  The solution is basic. 
B)  The solution is neutral. 
C)  The solution is acidic. 
D)  The solution is a strong oxidant. 
E)  The values for Ka and Kb for the species in solution must be known before a prediction can be made.

Exam 16: Acids and Bases

Calculate the pH of a solution containing 0.20 g of NaOH in 2.000L of solution.

What is the conjugate base of sulfuric acid?

Carboxylic acids are ________.

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- H2CO3 + PO43-

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the Ka for the acid?

Give the two factors that influence the extent to which an acid undergoes ionization.

What is the pH of a 0.056 M HNO3 solution?

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

Which is a Lewis acid?

For H3PO4, Ka1 = 7.3 × 10-3, Ka2 = 6.2 × 10-6, and Ka3 = 4.8 × 10-13. A 0.10 M aqueous solution of NaH2PO4 therefore would be ________.

Which is the strongest acid?

The substance HClO4 is considered to be

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO3, to 1.00 L of water. Which statement about the solution is correct?

Which of the following is the correct equilibrium expression for the autoionization of water?

Hydroxylamine, HONH2, readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps. Hydroxylamine has Kb = 9.1 × 10-9. What is the pH of a 0.025 M HONH2 solution?

Which is a Lewis acid but not a Brønsted acid?

A solution is prepared by adding 0.10 mol of potassium chloride, KCl, to 1.00 L of water. Which statement about the solution is correct?

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

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

Identify the conjugate base of HPO₄^2- in the reaction HCO₃^- + HPO₄^2- H₂CO₃ + PO₄^3-

Butyric acid is responsible for the odor in rancid butter. A solution of 0.25 M butyric acid has a pH of 2.71. What is the K_a for the acid?

What is the pH of a 0.056 M HNO₃ solution?

For H₃PO₄, K_a1 = 7.3 × 10^-3, K_a2 = 6.2 × 10^-6, and K_a3 = 4.8 × 10^-13. A 0.10 M aqueous solution of NaH₂PO₄ therefore would be ________.

The substance HClO₄ is considered to be

A solution is prepared by adding 0.10 mol of lithium nitrate, LiNO₃, to 1.00 L of water. Which statement about the solution is correct?

Hydroxylamine, HONH₂, readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps. Hydroxylamine has K_b = 9.1 × 10^-9. What is the pH of a 0.025 M HONH₂ solution?