Question 1

Which of the following is the strongest base?

Accepted Answer

A)  H3PO₄ 
B)  NH3 
C)  NaOH 
D)  NaCl 
E)  HCl 
A)  H3PO₄ 
B)  NH3 
C)  NaOH 
D)  NaCl 
E)  HCl

Question 2

Identify the conjugate acid-base pairs in the following reaction:
HCl + NH3 → NH4+ + Cl-

Accepted Answer

Question 3

If a condition of hypoventilation occurs, the blood pH of the patient is expected to

Accepted Answer

A)  saturate. 
B)  increase. 
C)  decrease. 
D)  stay the same. 
E)  concentrate. 
A)  saturate. 
B)  increase. 
C)  decrease. 
D)  stay the same. 
E)  concentrate.

Question 4

In which of the following are the pH values arranged from the most acidic to the most basic?

Accepted Answer

A)  1, 3, 6, 8, 11, 14 
B)  2, 5, 7, 9, 10, 1.1 
C)  14, 10, 7, 4, 3, 1 
D)  14, 10, 7, 1, 3, 5 
E)  7, 10, 14, 4, 3, 1 
A)  1, 3, 6, 8, 11, 14 
B)  2, 5, 7, 9, 10, 1.1 
C)  14, 10, 7, 4, 3, 1 
D)  14, 10, 7, 1, 3, 5 
E)  7, 10, 14, 4, 3, 1

Question 5

Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution?

Accepted Answer

A)  In acids, [OH-] is greater than [H3O+]. 
B)  In bases, [OH-] = [H3O+]. 
C)  In neutral solutions, [H3O+] = [ $\mathrm { H } _ { 2 }$ O]. 
D)  In bases, [OH-] is greater than [H3O+]. 
E)  In bases, [OH-] is less than [H3O+]. 
A)  In acids, [OH-] is greater than [H3O+]. 
B)  In bases, [OH-] = [H3O+]. 
C)  In neutral solutions, [H3O+] = [ $\mathrm { H } _ { 2 }$ O]. 
D)  In bases, [OH-] is greater than [H3O+]. 
E)  In bases, [OH-] is less than [H3O+].

Question 6

The conjugate acid of HPO₄2- is __________.

Accepted Answer

Question 7

The function of a buffer is to

Accepted Answer

A)  change color at the end point of a titration. 
B)  maintain the pH of a solution. 
C)  be a strong base. 
D)  maintain a neutral pH. 
E)  act as a strong acid. 
A)  change color at the end point of a titration. 
B)  maintain the pH of a solution. 
C)  be a strong base. 
D)  maintain a neutral pH. 
E)  act as a strong acid.

Question 8

Which of the following is the weakest acid?

Accepted Answer

A)  HF (Ka for HF is 7.2 × 10-4) 
B)  HCN (Ka for HCN is 4.9 × 10-10) 
C)  HCNO (Ka for HCNO is 2 × 10-4) 
D)  H3BO₃ (Ka for H3BO₃ is 5.4 × 10-10) 
A)  HF (Ka for HF is 7.2 × 10-4) 
B)  HCN (Ka for HCN is 4.9 × 10-10) 
C)  HCNO (Ka for HCNO is 2 × 10-4) 
D)  H3BO₃ (Ka for H3BO₃ is 5.4 × 10-10)

Question 9

The correct formula for sulfuric acid is

Accepted Answer

A)  H₂SO₄. 
B)  H₂SO₃. 
C)  H₂SO₄-. 
D)  H₂SO₃-. 
E)  SO₄2-. 
A)  H₂SO₄. 
B)  H₂SO₃. 
C)  H₂SO₄-. 
D)  H₂SO₃-. 
E)  SO₄2-.

Question 10

How many moles of H₂O are produced when 1 mole of Mg(OH)₂reacts with 1 mole of H₂SO₄?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 11

According to the Arrhenius concept, if NaOH were dissolved in water, it would act as

Accepted Answer

A)  a base. 
B)  an acid. 
C)  a source of hydronium ions. 
D)  a source of H- ions. 
E)  a proton donor. 
A)  a base. 
B)  an acid. 
C)  a source of hydronium ions. 
D)  a source of H- ions. 
E)  a proton donor.

Question 12

Which solution has the lowest pH?

Accepted Answer

A)  a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate 
B)  a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate 
C)  a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate 
D)  a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate 
E)  All of the buffers have the same pH since they are all made with acetic acid and sodium acetate. 
A)  a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate 
B)  a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate 
C)  a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate 
D)  a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate 
E)  All of the buffers have the same pH since they are all made with acetic acid and sodium acetate.

Question 13

Predict whether the equilibrium of the following reaction favors reactants or products: NHS1U1B14S1U1B0S1U1P1+S1S1P0S1S1P0 + H₂O ⇌ NHS1U1B13S1U1B0 + HS1U1B13S1U1B0OS1U1P1+S1S1P0

Accepted Answer

A)  Reactants are favored. 
B)  Products are favored. 
C)  Neither side is favored. 
A)  Reactants are favored. 
B)  Products are favored. 
C)  Neither side is favored.

Question 14

In which of the following are the pH values arranged from the most basic to the most acidic?

Accepted Answer

A)  1, 3, 6, 8, 11, 14 
B)  2, 5, 7, 9, 10, 11 
C)  14, 10, 7, 4, 3, 1 
D)  14, 10, 7, 1, 3, 5 
E)  7, 10, 14, 4, 3, 1 
A)  1, 3, 6, 8, 11, 14 
B)  2, 5, 7, 9, 10, 11 
C)  14, 10, 7, 4, 3, 1 
D)  14, 10, 7, 1, 3, 5 
E)  7, 10, 14, 4, 3, 1

Question 15

The [H3O+] of a solution with pH = 2 is

Accepted Answer

A)  10 M. 
B)  -10 M. 
C)  1 × 102 M. 
D)  1 × 10-2 M. 
E)  1 × 10-12 M. 
A)  10 M. 
B)  -10 M. 
C)  1 × 102 M. 
D)  1 × 10-2 M. 
E)  1 × 10-12 M.

Question 16

When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?

Accepted Answer

A)  oxygen 
B)  chlorine 
C)  nitrogen 
D)  carbon dioxide 
E)  hydrogen 
A)  oxygen 
B)  chlorine 
C)  nitrogen 
D)  carbon dioxide 
E)  hydrogen

Question 17

Which of the following is correctly identified?

Accepted Answer

A)  NH3, strong acid 
B)  NaOH, strong base 
C)  HCl, weak acid 
D)  H₂CO₃, strong acid 
E)  Ca(OH)₂, weak base 
A)  NH3, strong acid 
B)  NaOH, strong base 
C)  HCl, weak acid 
D)  H₂CO₃, strong acid 
E)  Ca(OH)₂, weak base

Question 18

When hyperventilation (rapid breathing) causes a patient to exhale large amounts of CO₂, the blood pH rises in a condition called

Accepted Answer

A)  metabolic acidosis. 
B)  metabolic alkalosis. 
C)  respiratory acidosis. 
D)  respiratory alkalosis. 
E)  pulmonary distress. 
A)  metabolic acidosis. 
B)  metabolic alkalosis. 
C)  respiratory acidosis. 
D)  respiratory alkalosis. 
E)  pulmonary distress.

Question 19

A 25.0 mL sample of H3PO₄ requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is the molarity of the acid?
 H3PO₄ + 3NaOH → Na3PO₄ + 3H₂O

Accepted Answer

A)  0.333 M 
B)  3.00 M 
C)  1.50 M 
D)  1.00 M 
E)  0.750 M 
A)  0.333 M 
B)  3.00 M 
C)  1.50 M 
D)  1.00 M 
E)  0.750 M

Question 20

How many milliliters of 0.100 M Ba(OH)₂are required to neutralize 20.0 mL of 0.250 M HCl?

Accepted Answer

A)  100. mL 
B)  50.0 mL 
C)  25.0 mL 
D)  0.250 mL 
E)  0.50 mL 
A)  100. mL 
B)  50.0 mL 
C)  25.0 mL 
D)  0.250 mL 
E)  0.50 mL

Exam 10: Acids and Bases

Which of the following is the strongest base?

Identify the conjugate acid-base pairs in the following reaction: HCl + NH3 → NH4+ + Cl-

If a condition of hypoventilation occurs, the blood pH of the patient is expected to

In which of the following are the pH values arranged from the most acidic to the most basic?

Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution?

The conjugate acid of HPO₄2- is __________.

The function of a buffer is to

Which of the following is the weakest acid?

The correct formula for sulfuric acid is

How many moles of H₂O are produced when 1 mole of Mg(OH)₂reacts with 1 mole of H₂SO₄?

According to the Arrhenius concept, if NaOH were dissolved in water, it would act as

Which solution has the lowest pH?

Predict whether the equilibrium of the following reaction favors reactants or products: NH4+ + H₂O ⇌ NH3 + H3O+

In which of the following are the pH values arranged from the most basic to the most acidic?

The [H3O+] of a solution with pH = 2 is

When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?

Which of the following is correctly identified?

When hyperventilation (rapid breathing) causes a patient to exhale large amounts of CO₂, the blood pH rises in a condition called

A 25.0 mL sample of H3PO₄ requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is the molarity of the acid? H3PO₄ + 3NaOH → Na3PO₄ + 3H₂O

How many milliliters of 0.100 M Ba(OH)₂are required to neutralize 20.0 mL of 0.250 M HCl?

Chemistry and Measurements

Energy and Matter

Atoms and Elements

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

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Reaction Rates and Chemical Equilibrium

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

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Amino Acids and Proteins

Enzymes and Vitamins

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Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

Identify the conjugate acid-base pairs in the following reaction: HCl + NH₃ → NH₄+ + Cl-

The conjugate acid of HPO₄^2- is __________.

Predict whether the equilibrium of the following reaction favors reactants or products: NH₄⁺ + H₂O ⇌ NH₃ + H₃O⁺

The [H₃O⁺] of a solution with pH = 2 is

A 25.0 mL sample of H₃PO₄ requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is the molarity of the acid? H₃PO₄ + 3NaOH → Na₃PO₄ + 3H₂O