Question 1

In the reaction, HSO4-(aq) + OH-(aq)   SO42-(aq) + H2O(l), the conjugate acid-base pairs are

Accepted Answer

A)  HSO4- and SO42-; H2O and OH-. 
B)  HSO4- and H3O+; SO42 - and OH-. 
C)  HSO4- and OH-; SO42 - and H2O. 
D)  HSO4- and H2O; OH - and SO42-. 
E)  HSO4- and OH-; SO42 - and H3O+. 
A)  HSO4- and SO42-; H2O and OH-. 
B)  HSO4- and H3O+; SO42 - and OH-. 
C)  HSO4- and OH-; SO42 - and H2O. 
D)  HSO4- and H2O; OH - and SO42-. 
E)  HSO4- and OH-; SO42 - and H3O+.

Question 2

What are the products of hydrolysis of NH4Cl?

Accepted Answer

A)  NH4+ + HCl 
B)  NH3 + OH- + HCl 
C)  NH3 + H3O+ + Cl- 
D)  NH4OH + HCl 
E)  No hydrolysis occurs. 
A)  NH4+ + HCl 
B)  NH3 + OH- + HCl 
C)  NH3 + H3O+ + Cl- 
D)  NH4OH + HCl 
E)  No hydrolysis occurs.

Question 3

What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH)2 solution?

Accepted Answer

A)  7.3 × 10-4 M 
B)  4.2 × 10-4 M 
C)  2.1 × 10-4 M 
D)  2.4 × 10-11 M 
E)  4.8 × 10-11 M 
A)  7.3 × 10-4 M 
B)  4.2 × 10-4 M 
C)  2.1 × 10-4 M 
D)  2.4 × 10-11 M 
E)  4.8 × 10-11 M

Question 4

Which one of the following is a strong base?

Accepted Answer

A)  LiOH 
B)  CH3COOH 
C)  NH3 
D)  H3PO4 
E)  HClO2 
A)  LiOH 
B)  CH3COOH 
C)  NH3 
D)  H3PO4 
E)  HClO2

Question 5

What is the conjugate base 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 6

The reaction of a strong acid with water results in

Accepted Answer

A)  a weak conjugate acid. 
B)  a strong conjugate base. 
C)  a weak conjugate base. 
D)  a strong base. 
E)  pure water. 
A)  a weak conjugate acid. 
B)  a strong conjugate base. 
C)  a weak conjugate base. 
D)  a strong base. 
E)  pure water.

Question 7

What is the value of Kb for the cyanide anion, CN-? Ka(HCN) = 6.2 × 10-10

Accepted Answer

A)  1.6 × 10-4 
B)  1.6 × 10-5 
C)  3.8 × 10-4 
D)  3.8 × 10-5 
E)  6.2 × 104 
A)  1.6 × 10-4 
B)  1.6 × 10-5 
C)  3.8 × 10-4 
D)  3.8 × 10-5 
E)  6.2 × 104

Question 8

Which of the following is the correct Kb expression for the reaction below? B(aq) + H2O(l)   HB+(aq) + OH-(aq)

Accepted Answer

A)  Kb = [B][H2O] 
B)    
C)    
D)    
E)  Kb = [HB+][OH-] 
A)  Kb = [B][H2O] 
B)    
C)    
D)    
E)  Kb = [HB+][OH-]

Question 9

What is the conjugate acid of the acetate ion?

Accepted Answer

A)  CH3O2- 
B)  COOH 
C)  HC2H3O2 
D)  H2O 
E)  CH4 
A)  CH3O2- 
B)  COOH 
C)  HC2H3O2 
D)  H2O 
E)  CH4

Question 10

Kw = 1.0 × 10-14 under all conditions.

Accepted Answer

A) True 
 B)False

Question 11

After a substance acting as a strong acid reacts, what remains of the acid?

Accepted Answer

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

Question 12

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO3)3, 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 value of Ka for the species in solution must be known before a prediction can be made. 
E)  The value of 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 value of Ka for the species in solution must be known before a prediction can be made. 
E)  The value of Kb for the species in solution must be known before a prediction can be made.

Question 13

Which is the most acidic oxide?

Accepted Answer

A)  SO2 
B)  Al2O3 
C)  CaO 
D)  PbO 
E)  H2O 
A)  SO2 
B)  Al2O3 
C)  CaO 
D)  PbO 
E)  H2O

Question 14

Which is the weakest acid?

Accepted Answer

A)  HBrO4 
B)  HBr 
C)  HBrO2 
D)  HBrO 
E)  HBrO3 
A)  HBrO4 
B)  HBr 
C)  HBrO2 
D)  HBrO 
E)  HBrO3

Question 15

The stronger the acid, the weaker its conjugate base.

Accepted Answer

A) True 
 B)False

Question 16

What is the pOH of a 0.0085 M KOH solution?

Accepted Answer

A)  2.07 
B)  4.85 
C)  9.15 
D)  11.93 
E)  0.0085 
A)  2.07 
B)  4.85 
C)  9.15 
D)  11.93 
E)  0.0085

Question 17

Which is an amphoteric oxide?

Accepted Answer

A)  Na2O 
B)  MgO 
C)  Al2O3 
D)  SO2 
E)  Cl2O7 
A)  Na2O 
B)  MgO 
C)  Al2O3 
D)  SO2 
E)  Cl2O7

Question 18

Which one of these responses is true with regard to a 0.1 M solution of a weak acid HA?

Accepted Answer

A)  [H+] > 0.1 M. 
B)  pH = 1.0 
C)  [H+] -] 
D)  pH > 1.0 
E)  [OH-] > [H+] 
A)  [H+] > 0.1 M. 
B)  pH = 1.0 
C)  [H+] -] 
D)  pH > 1.0 
E)  [OH-] > [H+]

Question 19

Which one of the following is a strong acid?

Accepted Answer

A)  CH3COOH 
B)  H2SO3 
C)  NH3 
D)  H3PO4 
E)  HClO3 
A)  CH3COOH 
B)  H2SO3 
C)  NH3 
D)  H3PO4 
E)  HClO3

Question 20

Which is the strongest acid?

Accepted Answer

A)  HBrO3 
B)  HFO3 
C)  HIO3 
D)  HClO3 
E)  All are of equal strength. 
A)  HBrO3 
B)  HFO3 
C)  HIO3 
D)  HClO3 
E)  All are of equal strength.

Exam 16: Acids and Bases

In the reaction, HSO4-(aq) + OH-(aq) SO42-(aq) + H2O(l), the conjugate acid-base pairs are

What are the products of hydrolysis of NH4Cl?

What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH)2 solution?

Which one of the following is a strong base?

What is the conjugate base of NH3?

The reaction of a strong acid with water results in

What is the value of Kb for the cyanide anion, CN-? Ka(HCN) = 6.2 × 10-10

Which of the following is the correct Kb expression for the reaction below? B(aq) + H2O(l) HB+(aq) + OH-(aq)

What is the conjugate acid of the acetate ion?

Kw = 1.0 × 10-14 under all conditions.

After a substance acting as a strong acid reacts, what remains of the acid?

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO3)3, to 1.00 L of water. Which statement about the solution is correct?

Which is the most acidic oxide?

Which is the weakest acid?

The stronger the acid, the weaker its conjugate base.

What is the pOH of a 0.0085 M KOH solution?

Which is an amphoteric oxide?

Which one of these responses is true with regard to a 0.1 M solution of a weak acid HA?

Which one of the following is a strong acid?

Which is the strongest acid?

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

In the reaction, HSO₄^-(aq) + OH^-(aq) SO₄^2-(aq) + H₂O(l), the conjugate acid-base pairs are

What are the products of hydrolysis of NH₄Cl?

What is the H⁺ ion concentration in a 2.1 × 10^-4^MCa(OH)₂ solution?

What is the conjugate base of NH₃?

What is the value of K_b for the cyanide anion, CN^-? K_a(HCN) = 6.2 × 10^-10

Which of the following is the correct K_b expression for the reaction below? B(aq) + H₂O(l) HB⁺(aq) + OH^-(aq)

K_w = 1.0 × 10^-14 under all conditions.

A solution is prepared by adding 0.10 mol of iron(III) nitrate, Fe(NO₃)₃, to 1.00 L of water. Which statement about the solution is correct?