Question 1

Which of the following energy diagrams best represents the changes in energy during addition of HBr to an alkene?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and C)
F) A) and C)

Question 2

Which of the following is a feature of a Brønsted-Lowry acid?

Accepted Answer

A)  proton donor
B)  proton acceptor
C)  electron pair donor
D)  electron pair acceptorE) All of the above
F) B) and D)

Question 3

Which of the following concepts can be used to rationalize the observation that acetic acid is a stronger acid than methanol?

Accepted Answer

A)  electronegativity
B)  resonance
C)  valence shell electron pair repulsion theory
D)  Pauli exclusion principleE) None of the above
F) All of the above

Question 4

Which of the following is a feature of a Brønsted-Lowry base?

Accepted Answer

A)  proton donor
B)  proton acceptor
C)  electron pair donor
D)  electron pair acceptorE) A) and B)
F) A) and C)

Question 5

Which of the following is the strongest base?

Accepted Answer

A)  NaOH
B)  NaCO3
C)  H2O
D)  CH3OHE) None of the above
F) A) and C)

Question 6

Which of the following is a definition of the activation energy of a reaction?

Accepted Answer

A)  the difference in Gibbs free energy between the reactants and the transition state
B)  the difference in Gibbs free energy between the reactants and the intermediate
C)  the difference in Gibbs free energy between the reactants and the product
D)  the difference in Gibbs free energy between the transition state and the productE) All of the above
F) A) and D)

Question 7

An acid with a low pKa is a strong acid and has a weak conjugate base.

Accepted Answer

A) True 
 B)False

Question 8

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values?
CH3CH2OH > CH3COOH
15.9 4.76

Accepted Answer

This trend is best understood in terms o...

Question 9

Which of the following is a feature of a Lewis base?

Accepted Answer

A)  proton donor
B)  proton acceptor
C)  electron pair donor
D)  electron pair acceptorE) None of the above
F) All of the above

Question 10

Which of the following is the strongest acid?

Accepted Answer

A)  HCl
B)  HI
C)  HF
D)  HBrE) None of the above
F) All of the above

Question 11

Consider the following reaction coordinate diagram.  This reaction is endergonic.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is present in the highest concentration upon dissolution of H2SO4 in water?

Accepted Answer

A)  H2SO4
B)  H+
C)  H3O+
D)  HO-E) None of the above
F) A) and B)

Question 13

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values?
CH3CH3 > CH2=CH2 > HCCH
ethane ethene ethyne
(ethylene) (acetylene)
51 44 25

Accepted Answer

This trend is best understood in terms o...

Question 14

Which of the following compounds is the strongest acid?

Accepted Answer

A)  CF3OH
B)  CF3CH2 CH2OH
C)  CF3CH2 CH2 CH2OH
D)  CF3CH2 CH2 CH2CH2OHE) A) and C)
F) C) and D)

Question 15

Which of the following has a pKa value of approximately 16?

Accepted Answer

A)  HBr
B)  CH3COOH
C)  CH3CH2OH
D)  HC ≡\equiv≡ CH E) A) and C)
F) A) and B)

Question 16

Which of the following compounds is the strongest acid?

Accepted Answer

A)  CH3CH2CH2COOH
B)  CH3CH2CHClCOOH
C)  CH3CHClCH2COOH
D)  ClCH2CH2CH2COOHE) A) and B)
F) B) and C)

Question 17

What is the value of the equilibrium constant for the following equilibrium?

Accepted Answer

log₁₀K_eq = pK_a(acid) - pK...

Question 18

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values?
CH3CH2OH > CF3CH2OH
ethanol 2,2,2-trifluoromethanol
15.9 12.4

Accepted Answer

This trend is best understood in terms o...

Question 19

Which of the following compounds is the strongest acid?

Accepted Answer

A)  CH3OCH3
B)  CH3CH2OH
C)  CH3CHO
D)  CH3CO2HE) All of the above
F) A) and D)

Question 20

Which of the following is the strongest base?

Accepted Answer

A)  iodide anion, I-
B)  fluoride anion, F-
C)  bromide anion, Br1-
D)  chloride anion, Cl-E) B) and C)
F) None of the above

Exam 4: Acids and Bases

Which of the following is a feature of a Lewis base?

Correct AnswerverifiedShow Answer

Which of the following compounds is the strongest acid?

Correct AnswerverifiedShow Answer

An acid with a low pKa is a strong acid and has a weak conjugate base.

Correct AnswerverifiedShow Answer

Which of the following is the strongest acid?

Correct AnswerverifiedShow Answer

Which of the following is a definition of the activation energy of a reaction?

Correct AnswerverifiedShow Answer

Which of the following is the strongest base?

Correct AnswerverifiedShow Answer

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values? CH3CH2OH > CH3COOH 15.9 4.76

Correct AnswerverifiedThis trend is best understood in terms o...View AnswerShow Answer

Which of the following is a feature of a Brønsted-Lowry base?

Correct AnswerverifiedShow Answer

Which of the following energy diagrams best represents the changes in energy during addition of HBr to an alkene?

Correct AnswerverifiedShow Answer

Consider the following reaction coordinate diagram. This reaction is endergonic.

Correct AnswerverifiedShow Answer

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values? CH3CH2OH > CF3CH2OH ethanol 2,2,2-trifluoromethanol 15.9 12.4

Correct AnswerverifiedThis trend is best understood in terms o...View AnswerShow Answer

Which of the following compounds is the strongest acid?

Correct AnswerverifiedShow Answer

What is the value of the equilibrium constant for the following equilibrium?

Correct Answerverifiedlog10Keq = pKa(acid) - pK...View AnswerShow Answer

Which of the following compounds is the strongest acid?

Correct AnswerverifiedShow Answer

Provide a brief explanation, based on features of the molecules, for the following trend in pKa values? CH3CH3 > CH2=CH2 > HCCH ethane ethene ethyne (ethylene) (acetylene) 51 44 25

Correct AnswerverifiedThis trend is best understood in terms o...View AnswerShow Answer

Which of the following is the strongest base?

Correct AnswerverifiedShow Answer

Which of the following is present in the highest concentration upon dissolution of H2SO4 in water?

Correct AnswerverifiedShow Answer

Which of the following has a pKa value of approximately 16?

Correct AnswerverifiedShow Answer

Which of the following is a feature of a Brønsted-Lowry acid?

Correct AnswerverifiedShow Answer

Which of the following concepts can be used to rationalize the observation that acetic acid is a stronger acid than methanol?

Correct AnswerverifiedShow Answer

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Correct Answer
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An acid with a low pK_a is a strong acid and has a weak conjugate base.

Correct Answer
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Provide a brief explanation, based on features of the molecules, for the following trend in pK_a values? CH₃CH₂OH > CH₃COOH 15.9 4.76

Correct Answer
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This trend is best understood in terms o...
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Correct Answer
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Correct Answer
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Correct Answer
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Provide a brief explanation, based on features of the molecules, for the following trend in pK_a values? CH₃CH₂OH > CF₃CH₂OH ethanol 2,2,2-trifluoromethanol 15.9 12.4

Correct Answer
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This trend is best understood in terms o...
View Answer

Correct Answer
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Correct Answer
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log₁₀K_eq = pK_a(acid) - pK...
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Correct Answer
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Provide a brief explanation, based on features of the molecules, for the following trend in pK_a values? CH₃CH₃ > CH₂=CH₂ > HCCH ethane ethene ethyne (ethylene) (acetylene) 51 44 25

Correct Answer
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This trend is best understood in terms o...
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Correct Answer
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Which of the following is present in the highest concentration upon dissolution of H₂SO₄ in water?

Correct Answer
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Which of the following has a pK_a value of approximately 16?

Correct Answer
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Correct Answer
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Correct Answer
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