Question 1

What is the product of the following Lewis acid-base reaction?

Accepted Answer

The answer of What is the product of the following...

Question 2

At what pH will 25% of a compound with a pKa of 5.3 be in its basic form?

Accepted Answer

The answer of At what pH will 25% of a...

Question 3

What is the conjugate base of CH3NH2?

Accepted Answer

A)  CH3NH3+
B)  CH3NH-
C)  NH4+
D)  NH2-

Question 4

Draw a resonance contributor and the resonance hybrid for HOCO2-.

Accepted Answer

resonance ...

Question 5

Consider the set of compounds,NH3,HF,and H2O.Rank these compounds in order of increasing acidity and discuss your rationale.

Accepted Answer

NH₃ < H₂O < HF When determining relative a...

Question 6

H-A is an acid with a pKa of 4.5.Which of the following statements about an aqueous solution of H-A is true?

Accepted Answer

A)  At pH = 4.5,the solution contains much more H-A than.A-.
B)  At pH = 4.5,the solution contains much more A- than H-A.
C)  At pH- 3.5,the solution contains about 90% A- and 10% H-A.
D)  At pH = 6.5,the solution contains about 80% A- and 20% H-A.
E)  At pH = 5.5,the solution contains about 90% A- and 10% H-A.

Question 7

The conjugate acid of H2O is

Accepted Answer

A)  H3O-.
B)  H3O.
C)  H3O+.
D)  HO-.
E)  H2O+.

Question 8

Which of the following is the strongest acid?

Accepted Answer

A)  CH3OH
B)  CH3OH2+
C)  H2N-
D)  CH3NH2
E)  CH3NH3+

Question 9

What would be the conjugate acid in the following acid base reaction? 2O B) CH3OH C) CH3SH2+ D) CH3S- E) H2O" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  CH2O
B)  CH3OH
C)  CH3SH2+
D)  CH3S-
E)  H2O

Question 10

Propanoic acid,CH3CH2COOH,has a pKa =4.9.Draw the structure of the conjugate base of propanoic acid and give the pH above which 90% of the compound will be in this conjugate base form.

Accepted Answer

Question 11

Predict the direction of equilibrium in the following reaction.Explain your answer.

Accepted Answer

Right Conjugate base on the ri...

Question 12

If H2O has a pKa value of 15.7 and HF has a pKa value of 3.2,which is a stronger base,HO- or F-? Explain.

Accepted Answer

HO^- is a stronger base than F^- b...

Question 13

Would you predict trifluoromethanesulfonic acid,CF3SO3H,to be a stronger or weaker acid than methanesulfonic acid,CH3SO3H? Explain your reasoning.

Accepted Answer

Trifluoromethanesulfonic acid is a stron...

Question 14

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

Accepted Answer

A)  (H2O,HO-) 
B)  (H2O,H3O+) 
C)  (HSO4-,H2SO4) 
D)  (-OH,O2-) 
E)  (NO3-,NO2-)

Question 15

Identify the compound with the highest pKa.

Accepted Answer

A)  CH3NH2
B)  CH3OH
C)  CH3COOH
D)  H2O
E)  CH3NH3+

Question 16

Which of the following is the strongest acid?

Accepted Answer

A)  HF
B)  H2O
C)  : NH3
D)  CH4
E)  CH3OH

Question 17

When a small amount of hexanoic acid [CH3(CH2) 4CO2H,pKa~4.8],is added to a separatory funnel which contains the organic solvent diethyl ether and water with a pH of 12.0,it is found mainly in the ________ phase as ________.

Accepted Answer

A)  ether; CH3(CH2) 4CO2-
B)  water; CH3(CH2) 4CO2-
C)  ether; CH3(CH2) 4CO2H
D)  water; CH3(CH2) 4CO2H
E)  none of the above

Question 18

2-Propanol is shown below.Draw the structure of its conjugate base.
(CH3)2CHOH

Accepted Answer

Question 19

Structure of Lorazepam,a widely known drug for short-term anxiety is shown below.Is the indicated lone pair localized or delocalized?

Accepted Answer

The answer of Structure of Lorazepam,a widely known drug for...

Question 20

What is the product formed from the following acid-base reaction when ammonia functions as a base? The equilibrium lies far to the reactants. 3O- + +NH4 B) CH2OH + +NH3 C) CH3OH2+ + -NH2 D) CH3NH2 + H2O E) CH4 + NH2OH" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  CH3O- + +NH4
B)  CH2OH + +NH3
C)  CH3OH2+ + -NH2
D)  CH3NH2 + H2O
E)  CH4 + NH2OH

Exam 2: Acids and Bases: Central to Understanding Organic Chemistry

At what pH will 25% of a compound with a pKa of 5.3 be in its basic form?

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Consider the set of compounds,NH3,HF,and H2O.Rank these compounds in order of increasing acidity and discuss your rationale.

Correct AnswerverifiedNH3 < H2O < HF When determining relative a...View AnswerShow Answer

The conjugate acid of H2O is

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What is the product of the following Lewis acid-base reaction?

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What is the conjugate base of CH3NH2?

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Structure of Lorazepam,a widely known drug for short-term anxiety is shown below.Is the indicated lone pair localized or delocalized?

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Draw a resonance contributor and the resonance hybrid for HOCO2-.

Correct Answerverifiedresonance ...View AnswerShow Answer

Would you predict trifluoromethanesulfonic acid,CF3SO3H,to be a stronger or weaker acid than methanesulfonic acid,CH3SO3H? Explain your reasoning.

Correct AnswerverifiedTrifluoromethanesulfonic acid is a stron...View AnswerShow Answer

Propanoic acid,CH3CH2COOH,has a pKa =4.9.Draw the structure of the conjugate base of propanoic acid and give the pH above which 90% of the compound will be in this conjugate base form.

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H-A is an acid with a pKa of 4.5.Which of the following statements about an aqueous solution of H-A is true?

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Predict the direction of equilibrium in the following reaction.Explain your answer.

Correct AnswerverifiedRight Conjugate base on the ri...View AnswerShow Answer

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

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What would be the conjugate acid in the following acid base reaction?

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When a small amount of hexanoic acid [CH3(CH2) 4CO2H,pKa~4.8],is added to a separatory funnel which contains the organic solvent diethyl ether and water with a pH of 12.0,it is found mainly in the ________ phase as ________.

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What is the product formed from the following acid-base reaction when ammonia functions as a base? The equilibrium lies far to the reactants.

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2-Propanol is shown below.Draw the structure of its conjugate base. (CH3)2CHOH

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If H2O has a pKa value of 15.7 and HF has a pKa value of 3.2,which is a stronger base,HO- or F-? Explain.

Correct AnswerverifiedHO- is a stronger base than F- b...View AnswerShow Answer

Identify the compound with the highest pKa.

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Which of the following is the strongest acid?

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Which of the following is the strongest acid?

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Consider the set of compounds,NH₃,HF,and H₂O.Rank these compounds in order of increasing acidity and discuss your rationale.

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NH₃ < H₂O < HF When determining relative a...
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The conjugate acid of H₂O is

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What is the conjugate base of CH₃NH₂?

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Draw a resonance contributor and the resonance hybrid for HOCO₂^-.

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resonance ...
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Would you predict trifluoromethanesulfonic acid,CF₃SO₃H,to be a stronger or weaker acid than methanesulfonic acid,CH₃SO₃H? Explain your reasoning.

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Trifluoromethanesulfonic acid is a stron...
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Propanoic acid,CH₃CH₂COOH,has a pKa =4.9.Draw the structure of the conjugate base of propanoic acid and give the pH above which 90% of the compound will be in this conjugate base form.

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Right Conjugate base on the ri...
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When a small amount of hexanoic acid [CH₃(CH₂) ₄CO₂H,pK_a~4.8],is added to a separatory funnel which contains the organic solvent diethyl ether and water with a pH of 12.0,it is found mainly in the phase as .

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Correct Answer
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2-Propanol is shown below.Draw the structure of its conjugate base. (CH₃)₂CHOH

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If H₂O has a pK_a value of 15.7 and HF has a pK_a value of 3.2,which is a stronger base,HO^- or F^-? Explain.

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HO^- is a stronger base than F^- b...
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Identify the compound with the highest pK_a.

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