Question 1

What is the concentration of H+ in a 0.025 M HCl solution?

Accepted Answer

A)  0 
B)  0.013 M 
C)  0.025 M 
D)  0.050 M 
E)  0.010 M 
A)  0 
B)  0.013 M 
C)  0.025 M 
D)  0.050 M 
E)  0.010 M

Question 2

What is the name of a proton donor in an acid-base reaction?

Accepted Answer

A)  Arrhenius acid 
B)  Arrhenius base 
C)  Brønsted acid 
D)  Brønsted base 
E)  Lewis base 
A)  Arrhenius acid 
B)  Arrhenius base 
C)  Brønsted acid 
D)  Brønsted base 
E)  Lewis base

Question 3

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH4Cl is correct?

Accepted Answer

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

Question 4

What is the pH of a 0.050 M triethylamine, (C2H5)3N, solution? Kb for triethylamine is 5.3 × 10-4.

Accepted Answer

A)  11.69 
B)  8.68 
C)  5.32 
D)  2.31 
E)  1.30 
A)  11.69 
B)  8.68 
C)  5.32 
D)  2.31 
E)  1.30

Question 5

The ammonium ion, NH4+, is a weak acid.

Accepted Answer

A) True 
 B)False

Question 6

Since zirconium is a metal, ZrO2 is expected to be a/an ________ oxide.

Accepted Answer

A)  acidic 
B)  ionic 
C)  amphoteric 
D)  neutral 
E)  basic 
A)  acidic 
B)  ionic 
C)  amphoteric 
D)  neutral 
E)  basic

Question 7

Which is the strongest acid?

Accepted Answer

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

Question 8

Calculate the concentration of malonate ion (C3H2O42-) in a 0.200 M solution of malonic acid (C3H4O4). (For malonic acid, Ka1 = 1.4 × 10-3, Ka2 = 2.0 × 10-6.)

Accepted Answer

A)  2.8 × 10-4 M 
B)  0.016 M 
C)  1.8 × 10-4 M 
D)  1.4 × 10-3 M 
E)  2.0 × 10-6 M 
A)  2.8 × 10-4 M 
B)  0.016 M 
C)  1.8 × 10-4 M 
D)  1.4 × 10-3 M 
E)  2.0 × 10-6 M

Question 9

Formic acid, which is a component of some insect venoms, 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 10

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr), for which Ka = 2.06 × 10-9.

Accepted Answer

A)  4.712 
B)  8.686 
C)  0.738 
D)  4.576 
E)  9.288 
A)  4.712 
B)  8.686 
C)  0.738 
D)  4.576 
E)  9.288

Question 11

What is the pOH of a 0.025 M HI solution?

Accepted Answer

A)  0.025 
B)  0.94 
C)  1.60 
D)  12.40 
E)  10.31 
A)  0.025 
B)  0.94 
C)  1.60 
D)  12.40 
E)  10.31

Question 12

Iodine trichloride, ICl3, will react with a chloride ion to form ICl4-. Which acts as a Lewis acid this reaction?

Accepted Answer

A)  ICl4- 
B)  ICl3 
C)  Cl- 
D)  I3+ 
E)  The solvent 
A)  ICl4- 
B)  ICl3 
C)  Cl- 
D)  I3+ 
E)  The solvent

Question 13

Which is the strongest base?

Accepted Answer

A)  CH3NH2, Kb = 4.4 × 10-4 
B)  C5H5N, Kb = 1.7 × 10-9 
C)  H2NCONH2, Kb = 1.5 × 10-14 
D)  NH3, Kb = 1.8 × 10-5 
E)  C2H5NH2, Kb = 5.6 × 10-4 
A)  CH3NH2, Kb = 4.4 × 10-4 
B)  C5H5N, Kb = 1.7 × 10-9 
C)  H2NCONH2, Kb = 1.5 × 10-14 
D)  NH3, Kb = 1.8 × 10-5 
E)  C2H5NH2, Kb = 5.6 × 10-4

Question 14

Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which of these substances would be most effective in dissolving the deposits?

Accepted Answer

A)  ammonia 
B)  bleach (sodium hypochlorite) 
C)  lye (sodium hydroxide) 
D)  vinegar (acetic acid) 
A)  ammonia 
B)  bleach (sodium hypochlorite) 
C)  lye (sodium hydroxide) 
D)  vinegar (acetic acid)

Question 15

Calcium oxide, CaO, also known as quick lime, may react with carbon dioxide to form calcium carbonate, CaCO3. Which acts as a Lewis acid in the reaction?

Accepted Answer

A)  Ca2+ 
B)  O2- 
C)  CO2 
D)  CaCO3 
E)  CO32- 
A)  Ca2+ 
B)  O2- 
C)  CO2 
D)  CaCO3 
E)  CO32-

Question 16

Which is a basic oxide?

Accepted Answer

A)  NO2 
B)  H2O 
C)  Na2O 
D)  SnO 
E)  SO2 
A)  NO2 
B)  H2O 
C)  Na2O 
D)  SnO 
E)  SO2

Question 17

The first ionization constant Ka1 is always smaller than the second ionization constant Ka2 for the ionization of a diprotic acid.

Accepted Answer

A) True 
 B)False

Question 18

What is the conjugate acid of the hydroxide ion?

Accepted Answer

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

Question 19

Which is the strongest acid?

Accepted Answer

A)  HBrO3 
B)  HClO 
C)  HBrO2 
D)  HBrO 
E)  HClO3 
A)  HBrO3 
B)  HClO 
C)  HBrO2 
D)  HBrO 
E)  HClO3

Question 20

What is the value of the equilibrium constant for the autoionization of water at 25°C?

Accepted Answer

A)  1.0 × 10-7 
B)  1.0 × 10-14 
C)  1.0 × 1014 
D)  1.0 × 107 
E)  14 
A)  1.0 × 10-7 
B)  1.0 × 10-14 
C)  1.0 × 1014 
D)  1.0 × 107 
E)  14

Exam 16: Acids and Bases

What is the concentration of H+ in a 0.025 M HCl solution?

What is the name of a proton donor in an acid-base reaction?

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH4Cl is correct?

What is the pH of a 0.050 M triethylamine, (C2H5)3N, solution? Kb for triethylamine is 5.3 × 10-4.

The ammonium ion, NH4+, is a weak acid.

Since zirconium is a metal, ZrO2 is expected to be a/an ________ oxide.

Which is the strongest acid?

Calculate the concentration of malonate ion (C3H2O42-) in a 0.200 M solution of malonic acid (C3H4O4). (For malonic acid, Ka1 = 1.4 × 10-3, Ka2 = 2.0 × 10-6.)

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

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr), for which Ka = 2.06 × 10-9.

What is the pOH of a 0.025 M HI solution?

Iodine trichloride, ICl3, will react with a chloride ion to form ICl4-. Which acts as a Lewis acid this reaction?

Which is the strongest base?

Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which of these substances would be most effective in dissolving the deposits?

Calcium oxide, CaO, also known as quick lime, may react with carbon dioxide to form calcium carbonate, CaCO3. Which acts as a Lewis acid in the reaction?

Which is a basic oxide?

The first ionization constant Ka1 is always smaller than the second ionization constant Ka2 for the ionization of a diprotic acid.

What is the conjugate acid of the hydroxide ion?

Which is the strongest acid?

What is the value of the equilibrium constant for the autoionization of water at 25°C?

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

What is the concentration of H⁺ in a 0.025 M HCl solution?

Ammonium chloride is used as an electrolyte in dry cells. Which statement about a 0.10 M solution of NH₄Cl is correct?

What is the pH of a 0.050 M triethylamine, (C₂H₅)₃N, solution? K_b for triethylamine is 5.3 × 10^-4.

The ammonium ion, NH₄⁺, is a weak acid.

Since zirconium is a metal, ZrO₂ is expected to be a/an ________ oxide.

Calculate the concentration of malonate ion (C₃H₂O₄^2-) in a 0.200 M solution of malonic acid (C₃H₄O₄). (For malonic acid, K_a1 = 1.4 × 10^-3, K_a2 = 2.0 × 10^-6.)

Formic acid, which is a component of some insect venoms, has a K_a = 1.8 × 10^-4. What is the [H₃O⁺] in a solution that is initially 0.10 M formic acid, HCOOH?

Find the pH of a 0.183 M aqueous solution of hypobromous acid (HOBr), for which K_a = 2.06 × 10^-9.

Iodine trichloride, ICl₃, will react with a chloride ion to form ICl₄^-. Which acts as a Lewis acid this reaction?

Calcium oxide, CaO, also known as quick lime, may react with carbon dioxide to form calcium carbonate, CaCO₃. Which acts as a Lewis acid in the reaction?

The first ionization constant K_a1 is always smaller than the second ionization constant K_a2 for the ionization of a diprotic acid.