Question 1

Rank the following compounds in order of increasing acidity,putting the least acidic first.

Accepted Answer

A)  I 
B)  I 
C)  II 
D)  II < IV < III < IE) All of the above
F) A) and D)

Question 2

Consider the following molecule with protons labeled,I-III.Rank these protons in order of decreasing acidity,putting the most acidic first.  II > III B) I > III > II C) III > II > I D) III > I > II" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > II > III
B)  I > III > II
C)  III > II > I
D)  III > I > IIE) None of the above
F) B) and D)

Question 3

Rank the following conjugate bases in order of increasing basicity,putting the least basic first.

Accepted Answer

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

Question 4

Which of the following statements about acid strength is true?

Accepted Answer

A)  The stronger the acid,the further the equilibrium lies to the left.
B)  The stronger the acid,the smaller the Ka.
C)  The stronger the acid,the larger the pKa.
D)  The stronger the acid,the smaller the pKa.E) C) and D)
F) A) and B)

Question 5

Which of the following compounds has the lowest pKa?

Accepted Answer

A)  H2O
B)  H2S
C)  NH3
D)  CH4E) B) and D)
F) A) and B)

Question 6

Which of the following species is the conjugate base of the hydronium ion,H3O+?

Accepted Answer

A)  H3O
B)  H2O-
C)  H2O
D)  HO-E) A) and D)
F) All of the above

Question 7

Which of the following compounds is the weakest acid?

Accepted Answer

A)  HF
B)  HCl
C)  HBr
D)  HIE) None of the above
F) A) and B)

Question 8

Which is the conjugate base in the following reaction?

Accepted Answer

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

Question 9

Which of the following species is not a Brønsted-Lowry base?

Accepted Answer

A)  BF3
B)  NH3
C)  H2O
D)  PO43-E) All of the above
F) C) and D)

Question 10

Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH3COOH) and ethanol (CH3CH2OH) ?

Accepted Answer

A)  Hybridization
B)  Electronegativity
C)  Resonance
D)  SizeE) A) and B)
F) A) and C)

Question 11

Identify the Lewis acid in the following reaction.

Accepted Answer

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

Question 12

Which of the following statements about Lewis acids is true?

Accepted Answer

A)  Lewis acids are proton donors.
B)  Lewis acids are proton acceptors.
C)  Lewis acids are electron pair donors.
D)  Lewis acids are electron pair acceptors.E) A) and B)
F) All of the above

Question 13

Which of the following statements about Lewis bases is true?

Accepted Answer

A)  Lewis bases are electron pair acceptors.
B)  Lewis bases are electron pair donors.
C)  Lewis bases are proton donors.
D)  Lewis bases are proton acceptors.E) B) and C)
F) C) and D)

Question 14

Consider the following structures I-IV.Which two species represent constitutional isomers?

Accepted Answer

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

Question 15

What is the direction of equilibrium when acetylene (C2H2) reacts with ethoxide (CH3CH2O-) in an acid-base reaction? 2H2) reacts with ethoxide (CH3CH2O-) in an acid-base reaction?   A) Left B) Right C) Neither D) Cannot be determined" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Left
B)  Right
C)  Neither
D)  Cannot be determinedE) A) and D)
F) A) and B)

Question 16

Which of the following concepts can be used to explain the difference in acidity between ethanol (CH3CH2OH) and 2-fluoroethanol (FCH2CH2OH) ?

Accepted Answer

A)  Size
B)  Inductive effect
C)  Resonance
D)  HybridizationE) None of the above
F) B) and C)

Question 17

Which of the following ranks the compounds in order of increasing acidity,putting the least acidic first?

Accepted Answer

A)  CH4 2O 3
B)  H2O 3 4
C)  NH3 4 2O
D)  CH4 3 2OE) A) and D)
F) B) and C)

Question 18

Which is the conjugate base in the following reaction?

Accepted Answer

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

Question 19

Which of the following concepts can be used to explain the difference in acidity between acetylene (C2H2) and ethylene (C2H4) ?

Accepted Answer

A)  Size
B)  Resonance
C)  Inductive effect
D)  HybridizationE) None of the above
F) C) and D)

Question 20

Which of the following statements explains why H2O is a stronger acid than CH4?

Accepted Answer

A)  H2O can form hydrogen bonds while CH4 cannot.
B)  H2O forms a less stable conjugate base,HO-.
C)  CH4 forms a more stable conjugate base,CH3-.
D)  H2O forms a more stable conjugate base,HO-.E) A) and C)
F) All of the above

Exam 2: Acids and Bases

Which of the following concepts can be used to explain the difference in acidity between acetylene (C2H2) and ethylene (C2H4) ?

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Which of the following statements about Lewis bases is true?

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Which of the following compounds is the weakest acid?

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Which of the following statements about Lewis acids is true?

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Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH3COOH) and ethanol (CH3CH2OH) ?

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Consider the following molecule with protons labeled,I-III.Rank these protons in order of decreasing acidity,putting the most acidic first.

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Which of the following statements about acid strength is true?

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What is the direction of equilibrium when acetylene (C2H2) reacts with ethoxide (CH3CH2O-) in an acid-base reaction?

Correct AnswerverifiedShow Answer

Rank the following conjugate bases in order of increasing basicity,putting the least basic first.

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Which of the following concepts can be used to explain the difference in acidity between ethanol (CH3CH2OH) and 2-fluoroethanol (FCH2CH2OH) ?

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Which of the following ranks the compounds in order of increasing acidity,putting the least acidic first?

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Rank the following compounds in order of increasing acidity,putting the least acidic first.

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Which of the following compounds has the lowest pKa?

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Which is the conjugate base in the following reaction?

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Which of the following species is not a Brønsted-Lowry base?

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Consider the following structures I-IV.Which two species represent constitutional isomers?

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Which is the conjugate base in the following reaction?

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Which of the following statements explains why H2O is a stronger acid than CH4?

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Which of the following species is the conjugate base of the hydronium ion,H3O+?

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Identify the Lewis acid in the following reaction.

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Which of the following concepts can be used to explain the difference in acidity between acetylene (C₂H₂) and ethylene (C₂H₄) ?

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Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH₃COOH) and ethanol (CH₃CH₂OH) ?

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What is the direction of equilibrium when acetylene (C₂H₂) reacts with ethoxide (CH₃CH₂O^-) in an acid-base reaction?

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Which of the following concepts can be used to explain the difference in acidity between ethanol (CH₃CH₂OH) and 2-fluoroethanol (FCH₂CH₂OH) ?

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Which of the following compounds has the lowest pK_a?

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Which of the following statements explains why H₂O is a stronger acid than CH₄?

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Which of the following species is the conjugate base of the hydronium ion,H₃O⁺?

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