Question 1

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

Accepted Answer

A)   OH-
B)   H3O+
C)   CH3COOH
D)   CH3COOH+E) None of the above
F) A) and B)

Question 2

Under which of the following conditions will a reaction be spontaneous when DH °\degree°  > 0?

Accepted Answer

A)   TDS °\degree°  = 0
B)   -TDS °\degree°  > DH °\degree° 
C)   TDS °\degree° °\degree° 
D)   DG °\degree°  = 0 E) C) and D)
F) All of the above

Question 3

Which of the following terms describes the reactivity of trimethylamine, (CH3) 3N?

Accepted Answer

A)   Brønsted-Lowry acid and Lewis acid
B)   Brønsted-Lowry base and Lewis base
C)   Lewis acid and not a Brønsted-Lowry acid
D)   Lewis base and not a Brønsted-Lowry baseE) A) and C)
F) C) and D) B

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) All of the above
F) B) and D)

Question 5

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

Accepted Answer

A)   HBr
B)   CH3COOH
C)   CH3CH2OH
D)   HCºCHE) A) and C)
F) A) and B)

Question 6

What is the approximate pKa value of acetic acid?

Accepted Answer

A)   -7
B)   5
C)   16
D)   51E) A) and C)
F) B) and D) B

Question 7

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

Accepted Answer

log₁₀K_eq = pK_a(acid) - pK...

Question 8

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

Accepted Answer

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

Question 9

Which of the following terms describes the reactivity of boron tribromide, BBr3?

Accepted Answer

A)   Brønsted-Lowry acid and Lewis acid
B)   Brønsted-Lowry base and Lewis base
C)   Lewis acid and not a Brønsted-Lowry acid
D)   Lewis base and not a Brønsted-Lowry baseE) C) and D)
F) A) and B)

Question 10

Use curved arrows to show the movement of pairs of electrons in the following reaction between a Lewis acid and a Lewis base, and show the structure of the product.

Accepted Answer

The answer of Use curved arrows to show the movement...

Question 11

Which set of curved arrows accounts for the deprotonation of an acid (A-H)  by a base (:B) ?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) All of the above
F) B) and C)

Question 12

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) None of the above
F) A) and B) A

Question 13

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) C) and D)
F) None of the above

Question 14

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 C)

Question 15

Which species is the conjugate acid in the following acid-base reaction?

Accepted Answer

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

Question 16

Which of the following is easiest to deprotonate?

Accepted Answer

A)   CH4
B)   CH3CH3
C)   CH2=CH2
D)   HCºCHE) B) and C)
F) C) and D)

Question 17

Which of the following compounds has the lowest pKa?

Accepted Answer

A)   H2O
B)   H2S
C)   H2Se
D)   H2TeE) A) and D)
F) All of the above

Question 18

Which of the following terms describes the role of ethanol in the acid-base reaction shown?

Accepted Answer

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

Question 19

Which of the following energy diagrams represents the slowest reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) All of the above
F) C) and D)

Question 20

Which of the following is the strongest base?

Accepted Answer

A)   NaOH
B)   NaCO3
C)   H2O
D)   CH3OHE) B) and D)
F) A) and B)

Exam 4: Acids and Bases

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

Correct AnswerverifiedShow Answer

Under which of the following conditions will a reaction be spontaneous when DH °\degree° > 0?

Correct AnswerverifiedShow Answer

Which of the following terms describes the reactivity of trimethylamine, (CH3) 3N?

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the approximate pKa value of acetic acid?

Correct AnswerverifiedB

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

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

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

Correct AnswerverifiedShow Answer

Which of the following terms describes the reactivity of boron tribromide, BBr3?

Correct AnswerverifiedShow Answer

Use curved arrows to show the movement of pairs of electrons in the following reaction between a Lewis acid and a Lewis base, and show the structure of the product.

Correct AnswerverifiedShow Answer

Which set of curved arrows accounts for the deprotonation of an acid (A-H) by a base (:B) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which species is the conjugate acid in the following acid-base reaction?

Correct AnswerverifiedShow Answer

Which of the following is easiest to deprotonate?

Correct AnswerverifiedShow Answer

Which of the following compounds has the lowest pKa?

Correct AnswerverifiedShow Answer

Which of the following terms describes the role of ethanol in the acid-base reaction shown?

Correct AnswerverifiedShow Answer

Which of the following energy diagrams represents the slowest reaction?

Correct AnswerverifiedShow Answer

Which of the following is the strongest base?

Correct AnswerverifiedShow Answer

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Under which of the following conditions will a reaction be spontaneous when DH $\degree$ > 0?

Correct Answer
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Which of the following terms describes the reactivity of trimethylamine, (CH₃) ₃N?

Correct Answer
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B

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

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What is the approximate pK_a value of acetic acid?

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B

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log₁₀K_eq = pK_a(acid) - pK...
View Answer

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Which of the following terms describes the reactivity of boron tribromide, BBr₃?

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A

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Which of the following compounds has the lowest pK_a?

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