Question 1

Which equilibria have equilibrium constants greater than 1.0?

Accepted Answer

A)   II, III
B)   I, III, IV
C)   III, IV
D)   I, II, IIIE) All of the above
F) B) and D)

Question 2

Identify the acid, base, conjugate acid, conjugate base in the following reaction.

Accepted Answer

acid, base...

Question 3

Lewis bases donate electrons when reacting.

Accepted Answer

A) True 
 B)False

Question 4

The equilibrium constant will be greater than 1.0 for the following reaction

Accepted Answer

A) True 
 B)False  False

Question 5

Which are acid-base reactions according to Brønsted-Lowry theory?

Accepted Answer

A)   I, III
B)   I, II, II, IV
C)   I, II, III
D)   I, III, IVE) All of the above
F) B) and C)

Question 6

What is the role of water in the following reaction?

Accepted Answer

A)   acid
B)   base
C)   conjugate acid
D)   conjugate baseE) B) and C)
F) A) and B)

Question 7

Which equilibria have equilibrium constants smaller than 1.0?

Accepted Answer

A)   II
B)   I, IV
C)   III, IV
D)   IE) None of the above
F) All of the above

Question 8

What is the role of methanol (CH3OH)  in the following reaction?
3OH)  in the following reaction?   A)  Lewis acid B)  Lewis base C)  Brønsted acid D)  Brønsted base" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Lewis acid
B)   Lewis base
C)   Brønsted acid
D)   Brønsted baseE) A) and B)
F) A) and C) B

Question 9

Which of these has the lowest numerical value of pKa and is therefore the strongest acid?

Accepted Answer

A)   CH3COOH
B)   H2O
C)   NH4+
D)   HClE) B) and C)
F) C) and D)

Question 10

Which statements about acid-base equilibria are true?
I. The pKa is the negative log10 of the acid equilibrium constant.
II. A stronger acid has a pKa with a smaller value than a weaker acid.
III. The stronger the base, the smaller the pKa of its conjugate acid.
IV. The Ka = K [HA].

Accepted Answer

A)   I, III
B)   I, II
C)   I, II, III
D)   II, III, IVE) C) and D)
F) B) and C)

Question 11

Which is the stronger base if the equilibrium lies to the right? (Sec. 2.4, HARD)

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) A) and B)
F) All of the above

Question 12

List the bonds in order of decreasing acidity (most to least) .

Accepted Answer

A)   I, III, II, IV
B)   IV, II, III, I
C)   II, III, IV, I
D)   I, II, III, IVE) None of the above
F) A) and B)

Question 13

The strongest acid in the following list is sodium bicarbonate.

Accepted Answer

A) True 
 B)False

Question 14

Arrange the following species in order of increasing basicity (weakest to strongest) .
I. OH- 
II. Cl- 
III. H2O 
IV. NH3

Accepted Answer

A)   II, III, IV, I
B)   III, I, IV, II
C)   IV, I, II, III
D)   III, IV, I, IIE) B) and D)
F) All of the above

Question 15

Which are acid-base reactions according to Lewis theory but not according to the Brønsted-Lowry theory?

Accepted Answer

A)   I, II
B)   III, IV
C)   I, III, IV
D)   I, II, III, IVE) C) and D)
F) None of the above

Question 16

Ammonia acts as a Brønsted-Lowry base in the following reaction.

Accepted Answer

A) True 
 B)False

Question 17

Which is the order of decreasing acid strength of the following compounds (greatest first) ?

Accepted Answer

A)   II, I, III, IV
B)   III, IV, I, II
C)   III, I, II, IV
D)   IV, II, I, IIIE) C) and D)
F) A) and C)

Question 18

Which is the proper reaction mechanism for the reaction of boron trifluoride and diethyl ether?
Assume that the charges are correct and add electron pairs, if needed. Also consider how many electrons should be in the outer shell of boron trifluoride to make it neutral.

Accepted Answer

A)   I
B)   II
C)   III
D)   IVE) A) and B)
F) A) and C) B

Question 19

Identify the Arrhenius bases:
I. NH3 
II. NaOH 
III. HI 
IV. Ca(OH) 2

Accepted Answer

A)   I, II
B)   II, IV
C)   I, III
D)   I, II, IVE) B) and C)
F) A) and D)

Question 20

Complete the following reaction scheme with the appropriate equilibrium arrow (indicating the higher concentrations at equilibrium).

Accepted Answer

The answer of Complete the following reaction scheme with the...

Exam 2: Acids and Bases

Which equilibria have equilibrium constants greater than 1.0?

Correct AnswerverifiedShow Answer

Identify the acid, base, conjugate acid, conjugate base in the following reaction.

Correct Answerverifiedacid, base...View AnswerShow Answer

Lewis bases donate electrons when reacting.

Correct AnswerverifiedShow Answer

The equilibrium constant will be greater than 1.0 for the following reaction

Correct AnswerverifiedFalse

Which are acid-base reactions according to Brønsted-Lowry theory?

Correct AnswerverifiedShow Answer

What is the role of water in the following reaction?

Correct AnswerverifiedShow Answer

Which equilibria have equilibrium constants smaller than 1.0?

Correct AnswerverifiedShow Answer

What is the role of methanol (CH3OH) in the following reaction?

Correct AnswerverifiedB

Which of these has the lowest numerical value of pKa and is therefore the strongest acid?

Correct AnswerverifiedShow Answer

Which statements about acid-base equilibria are true? I. The pKa is the negative log10 of the acid equilibrium constant. II. A stronger acid has a pKa with a smaller value than a weaker acid. III. The stronger the base, the smaller the pKa of its conjugate acid. IV. The Ka = K [HA].

Correct AnswerverifiedShow Answer

Which is the stronger base if the equilibrium lies to the right? (Sec. 2.4, HARD)

Correct AnswerverifiedShow Answer

List the bonds in order of decreasing acidity (most to least) .

Correct AnswerverifiedShow Answer

The strongest acid in the following list is sodium bicarbonate.

Correct AnswerverifiedShow Answer

Arrange the following species in order of increasing basicity (weakest to strongest) . I. OH- II. Cl- III. H2O IV. NH3

Correct AnswerverifiedShow Answer

Which are acid-base reactions according to Lewis theory but not according to the Brønsted-Lowry theory?

Correct AnswerverifiedShow Answer

Ammonia acts as a Brønsted-Lowry base in the following reaction.

Correct AnswerverifiedShow Answer

Which is the order of decreasing acid strength of the following compounds (greatest first) ?

Correct AnswerverifiedShow Answer

Which is the proper reaction mechanism for the reaction of boron trifluoride and diethyl ether? Assume that the charges are correct and add electron pairs, if needed. Also consider how many electrons should be in the outer shell of boron trifluoride to make it neutral.

Correct AnswerverifiedB

Identify the Arrhenius bases: I. NH3 II. NaOH III. HI IV. Ca(OH) 2

Correct AnswerverifiedShow Answer

Complete the following reaction scheme with the appropriate equilibrium arrow (indicating the higher concentrations at equilibrium).

Correct AnswerverifiedShow Answer

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acid, base...
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False

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What is the role of methanol (CH₃OH) in the following reaction?

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B

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Which statements about acid-base equilibria are true? I. The pKa is the negative log₁₀ of the acid equilibrium constant. II. A stronger acid has a pKa with a smaller value than a weaker acid. III. The stronger the base, the smaller the pKa of its conjugate acid. IV. The Ka = K [HA].

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Arrange the following species in order of increasing basicity (weakest to strongest) . I. OH^- II. Cl^- III. H₂O IV. NH₃

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B

Identify the Arrhenius bases: I. NH₃ II. NaOH III. HI IV. Ca(OH) ₂

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