Question 1

The strongest base which can exist in water is the hydroxide ion.

Accepted Answer

A) True 
 B)False

Question 2

All strong acids have weak conjugate bases.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is the strongest acid?

Accepted Answer

A)   CH3COOH
B)   HF
C)   H3PO4
D)   H2SO3
E)   H2SO4F) A) and B)
G) B) and C)

Question 4

Lactic acid has a pKa of 3.08. What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Accepted Answer

A)   1.1%
B)   2.2%
C)   4.8%
D)   14%
E)   None of these choices are correct.F) A) and E)
G) B) and D)

Question 5

What is the pH of a 0.75 M HNO3 solution?

Accepted Answer

A)   0.12
B)   0.29
C)   0.63
D)   0.82
E)   > 1.0F) None of the above
G) A) and B)

Question 6

The substance Ba(OH) 2 is considered

Accepted Answer

A)   a weak Arrhenius acid.
B)   a weak Arrhenius base.
C)   a strong Arrhenius acid.
D)   a strong Arrhenius base.
E)   a neutral compound.F) A) and B)
G) A) and E)

Question 7

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

Accepted Answer

A)   Ca2+
B)   O2-
C)   CO2
D)   CaCO3
E)   None of these choices are correct.F) A) and B)
G) B) and D)

Question 8

Which one of the following pairs is not a conjugate acid-base pair?

Accepted Answer

A)   H2O/OH-
B)   H2O2/HO2-
C)   OH-/O2-
D)   H2PO4-/HPO42-
E)   HCl/H+F) C) and E)
G) B) and D)

Question 9

What is the pH of a 0.20 M HCl solution?

Accepted Answer

A)   
B)   0.70
C)   1.61
D)   12.39
E)   13.30F) None of the above
G) A) and E)

Question 10

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Accepted Answer

A)   CH3NH2
B)   NaOH
C)   CO2
D)   Ca(OH) 2
E)   CH4F) A) and B)
G) None of the above

Question 11

Hydrated metal ions in aqueous solution can act as Brønsted-Lowry acids.

Accepted Answer

A) True 
 B)False

Question 12

A 1.25 M solution of the weak acid HA is 9.2% dissociated. What is the pH of the solution?

Accepted Answer

A)   0.64
B)   0.94
C)   1.13
D)   2.16
E)   None of these choices are correct.F) D) and E)
G) A) and B)

Question 13

Kw = 1.0 × 10-14, regardless of temperature.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Accepted Answer

A)   The solution is strongly basic.
B)   The solution is weakly 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.F) A) and B)
G) A) and C)

Question 16

Select the correct relationship among the concentrations of species present in a 1.0 M aqueous solution of the weak acid represented by HA.

Accepted Answer

A)   [H2O] > [A-] ~ [H3O+] > [HA] > [OH-]
B)   [H2O] > [HA] > [A-] > [H3O+] > [OH-]
C)   [HA] > [H2O] > [A-] > [H3O+] > [OH-]
D)   [H2O] > [HA] > [A-] ~ [H3O+] > [OH-]
E)   [HA] > [H2O] > [A-] ~ [H3O+] > [OH-]F) A) and B)
G) A) and C)

Question 17

Which, if any, of the following acids is strong?

Accepted Answer

A)   phosphoric
B)   carbonic
C)   acetic
D)   water
E)   None of these choices are correct.F) A) and D)
G) All of the above

Question 18

It is not possible to have a pH lying outside the range 0 to 14.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following pairs has the stronger acid listed first?

Accepted Answer

A)   H2AsO3, H2AsO4
B)   HI, HBr
C)   HClO, HClO3
D)   H2S, HCl
E)   H2SO3, H2SO4F) A) and C)
G) A) and B)

Question 20

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4(aq)  + NO2(aq)  3PO4(aq)  + NO2(aq)    H2PO4(aq)  + HNO2(aq)  The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct? A)  Phosphoric acid is a weaker acid than nitrous acid. B)  Nitrous acid is a weaker acid than water. C)  The nitrite anion is a weaker base than the dihydrogen phosphate anion. D)  The dihydrogen phosphate anion is a stronger acid than nitrous acid. E)  Phosphoric acid is a stronger acid than nitrous acid." class="answers-bank-image d-inline" rel="preload" > H2PO4(aq)  + HNO2(aq) 
The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct?

Accepted Answer

A)   Phosphoric acid is a weaker acid than nitrous acid.
B)   Nitrous acid is a weaker acid than water.
C)   The nitrite anion is a weaker base than the dihydrogen phosphate anion.
D)   The dihydrogen phosphate anion is a stronger acid than nitrous acid.
E)   Phosphoric acid is a stronger acid than nitrous acid.F) A) and E)
G) A) and D)

Exam 18: Acid-Base Equilibria

Select the correct relationship among the concentrations of species present in a 1.0 M aqueous solution of the weak acid represented by HA.

Correct Answer
verified

It is not possible to have a pH lying outside the range 0 to 14.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which, if any, of the following acids is strong?

Correct Answer
verified

The strongest base which can exist in water is the hydroxide ion.

Correct Answer
verified

The substance Ba(OH) ₂ is considered

Correct Answer
verified

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Correct Answer
verified

Which of the following is the strongest acid?

Correct Answer
verified

A 1.25 M solution of the weak acid HA is 9.2% dissociated. What is the pH of the solution?

Correct Answer
verified

Which of the following pairs has the stronger acid listed first?

Correct Answer
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All strong acids have weak conjugate bases.

Correct Answer
verified

Lactic acid has a pK_a of 3.08. What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct Answer
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What is the pH of a 0.75 M HNO₃ solution?

Correct Answer
verified

What is the pH of a 0.20 M HCl solution?

Correct Answer
verified

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Correct Answer
verified

K_w = 1.0 × 10^-14, regardless of temperature.

Correct Answer
verified

Hydrated metal ions in aqueous solution can act as Brønsted-Lowry acids.

Correct Answer
verified

Correct Answer
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Which one of the following pairs is not a conjugate acid-base pair?

Correct Answer
verified

Exam 18: Acid-Base Equilibria

Select the correct relationship among the concentrations of species present in a 1.0 M aqueous solution of the weak acid represented by HA.

Correct AnswerverifiedShow Answer

It is not possible to have a pH lying outside the range 0 to 14.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which, if any, of the following acids is strong?

Correct AnswerverifiedShow Answer

The strongest base which can exist in water is the hydroxide ion.

Correct AnswerverifiedShow Answer

The substance Ba(OH) 2 is considered

Correct AnswerverifiedShow Answer

Which one of the following will give a solution with a pH > 7, but is not an Arrhenius base in the strict sense?

Correct AnswerverifiedShow Answer

Which of the following is the strongest acid?

Correct AnswerverifiedShow Answer

A 1.25 M solution of the weak acid HA is 9.2% dissociated. What is the pH of the solution?

Correct AnswerverifiedShow Answer

Which of the following pairs has the stronger acid listed first?

Correct AnswerverifiedShow Answer

All strong acids have weak conjugate bases.

Correct AnswerverifiedShow Answer

Lactic acid has a pKa of 3.08. What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct AnswerverifiedShow Answer

What is the pH of a 0.75 M HNO3 solution?

Correct AnswerverifiedShow Answer

What is the pH of a 0.20 M HCl solution?

Correct AnswerverifiedShow Answer

An aqueous solution is prepared by dissolving the salt formed by the neutralization of a weak acid by a weak base. Which statement about the solution is correct?

Correct AnswerverifiedShow Answer

Kw = 1.0 × 10-14, regardless of temperature.

Correct AnswerverifiedShow Answer

Hydrated metal ions in aqueous solution can act as Brønsted-Lowry acids.

Correct AnswerverifiedShow Answer

Aqueous solutions of phosphoric acid and sodium nitrite are combined, and the following equilibrium is established. H3PO4(aq) + NO2(aq) H2PO4(aq) + HNO2(aq) The equilibrium constant Kc for this reaction is greater than one. Based on this information, which of the following statements is correct?

Correct AnswerverifiedShow Answer

Which one of the following pairs is not a conjugate acid-base pair?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The substance Ba(OH) ₂ is considered

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Lactic acid has a pK_a of 3.08. What is the approximate degree of dissociation of a 0.35 M solution of lactic acid?

Correct Answer
verified

What is the pH of a 0.75 M HNO₃ solution?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

K_w = 1.0 × 10^-14, regardless of temperature.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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