Question 1

Which reaction will yield CH3CH2-D?

Accepted Answer

A)  CH3CH3 + D2O
B)  CH3CH2Li + D2O
C)  CH3CH2OLi + D2O
D)  CH3CH2OH + D2O
E)  More than one of these choices.

Question 2

What deuterium reactant would give the following product? 2O B) D3O+ C) NaOD D) CH3OD E) None of these choices." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  D2O
B)  D3O+
C)  NaOD
D)  CH3OD
E)  None of these choices.

Question 3

Based on the position of the central atom in the periodic chart,we predict that the strongest acid of the following is:

Accepted Answer

A)  H2O
B)  H2S
C)  H2Se
D)  H2Te
E)  All acids are equal in strength.

Question 4

For a reaction that has positive change in entropy,increasing the temperature of the reaction will help make the reaction energetically favorable to form products.

Accepted Answer

A) True 
 B)False

Question 5

A group of acids arranged in order of decreasing acidity is: HNO3 > CH3COOH > C6H5OH > H2O > HC ≡\equiv≡ CH
What is the arrangement of the conjugate bases of these compounds in decreasing order of basicity?

Accepted Answer

A)  NO3- > CH3COO- > C6H5O- > OH- > HC ≡\equiv≡ C-
B)  CH3COO- > C6H5O- > NO3- > OH- > HC ≡\equiv≡ C-
C)  C6H5O- > NO3- > HC ≡\equiv≡ C- > OH- > CH3COO-
D)  HC ≡\equiv≡ C- > OH- > C6H5O- > CH3COO- > NO3-
E)  No prediction of relative base strength is possible.

Question 6

Which acid-base reaction would not take place as written?

Accepted Answer

A)  CH3Li + CH3CH2CH2CH2NH2  →	o→ CH4 + CH3CH2CH2CH2NHLi
B)  CH3C ≡\equiv≡ CH + NaOCH3  →	o→ CH3C ≡\equiv≡ CNa + CH3OH
C)  HC ≡\equiv≡ CNa + H2O  →	o→ HC ≡\equiv≡ CH + NaOH
D)  CH3OH + NaNH2  →	o→ CH3ONa + NH3
E)  CH3CO2H + CH3ONa  →	o→ CH3CO2Na + CH3OH

Question 7

Which of the following substances has a hydrogen atom with pKa ≈ 25?

Accepted Answer

A)  CH3CH2CH2CH2CO2H
B)  CH3CHCH2C≡CCH3
C)  CH3CH2CH2C≡CH
D)  CH3CH2CH2CH2CH=CH2
E)  CH3CH2CH2CH2NH2

Question 8

An acid,HA,has the following thermodynamic values for its dissociation in water at 27 ºC:  Δ\DeltaΔ H = -8.0 kJ mol-1;  Δ\DeltaΔ S = -70 J K-1mol-1.The  Δ\DeltaΔ G for the process is:

Accepted Answer

A)  +29 kJ mol-1
B)  +13 kJ mol-1
C)  -6.1 kJ mol-1
D)  -13 kJ mol-1
E)  -29 kJ mol-1

Question 9

The compound aniline,C6H5NH2,has weakly basic properties in aqueous solution.In this other solvent,aniline would behave as a strong base.

Accepted Answer

A)  CH3OH
B)  CH3CH2OH
C)  CF3CO2H
D)  Liquid NH3
E)  CH3(CH2) 4CH3

Question 10

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.  II > III > V > I B) II > IV > I > V > III C) IV > I > III > II > V D) I > IV > II > V > III E) I > IV > II > III > V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  IV > II > III > V > I
B)  II > IV > I > V > III
C)  IV > I > III > II > V
D)  I > IV > II > V > III
E)  I > IV > II > III > V

Question 11

Which of these is not a Lewis acid?

Accepted Answer

A)  AlCl3
B)  H3O+
C)  FeCl3
D)  SO3
E)  C4H10

Question 12

A product of the reaction,CH3CH2Li + D2O  →	o→  is

Accepted Answer

A)  CH3CH2OD
B)  CH3CH2CH2CH3
C)  CH2=CH2
D)  CH3CH2D
E)  CH3CH2OCH2CH3

Question 13

Briefly,but clearly,explain why the -OH hydrogen in acetic acid (CH3CO2H)is more acidic than in ethanol (C2H5OH).

Accepted Answer

The greater acidity of the -OH hydrogen ...

Question 14

Which of the reaction conditions could afford the following transformation?

Accepted Answer

A)   
B)   
C)   
D)   
E)  All of these choices would work.

Question 15

Which of these is not a true statement?

Accepted Answer

A)  All Lewis bases are also Bronsted-Lowry bases.
B)  All Lewis acids contain hydrogen.
C)  All Bronsted-Lowry acids contain hydrogen.
D)  All Lewis acids are electron deficient.
E)  According to the Bronsted-Lowry theory,water is both an acid and a base.

Question 16

Why do water-insoluble carboxylic acids dissolve in aqueous sodium hydroxide?

Accepted Answer

Because they are con...

Question 17

Adding methyllithium,CH3Li,to ethanol produces:

Accepted Answer

A)  CH3CH2Li + CH3OH
B)  CH3CH2OLi + CH4
C)  CH3CH2OCH3 + LiH
D)  All of these choices.
E)  No reaction takes place.

Question 18

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.  II > III > IV > V B) V > IV > II > III > I C) V > II > IV > III > I D) II > V > IV > III > I E) V > IV > III > II > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > II > III > IV > V
B)  V > IV > II > III > I
C)  V > II > IV > III > I
D)  II > V > IV > III > I
E)  V > IV > III > II > I

Question 19

Which of the following is not a conjugate acid - conjugate base pair (in that order) ?

Accepted Answer

A)  H3PO4,H2PO4-
B)  HBF4,BF4-
C)  CH3CH2OH,CH3CH2O--
D)  H3O+,H2O
E)  HPO42-,H2PO4-

Question 20

In the following reaction which chemical species is acting like a nucleophile? 3O- D) two of these choices E) there is no nucleophile in this reaction" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   3O- 
D)  two of these choices 
E)  there is no nucleophile in this reaction" class="answers-bank-image d-inline" rel="preload" >
B)   3O- 
D)  two of these choices 
E)  there is no nucleophile in this reaction" class="answers-bank-image d-inline" rel="preload" >
C)  CH3O-
D)  two of these choices
E)  there is no nucleophile in this reaction

Exam 3: Acids and Bases

A product of the reaction,CH3CH2Li + D2O →\to→ is

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Which of these is not a Lewis acid?

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Which of the following is not a conjugate acid - conjugate base pair (in that order) ?

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Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

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For a reaction that has positive change in entropy,increasing the temperature of the reaction will help make the reaction energetically favorable to form products.

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Which acid-base reaction would not take place as written?

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The compound aniline,C6H5NH2,has weakly basic properties in aqueous solution.In this other solvent,aniline would behave as a strong base.

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Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

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Adding methyllithium,CH3Li,to ethanol produces:

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Which reaction will yield CH3CH2-D?

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Which of the reaction conditions could afford the following transformation?

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In the following reaction which chemical species is acting like a nucleophile?

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Why do water-insoluble carboxylic acids dissolve in aqueous sodium hydroxide?

Correct AnswerverifiedBecause they are con...View AnswerShow Answer

Based on the position of the central atom in the periodic chart,we predict that the strongest acid of the following is:

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Which of these is not a true statement?

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Which of the following substances has a hydrogen atom with pKa ≈ 25?

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An acid,HA,has the following thermodynamic values for its dissociation in water at 27 ºC: Δ\DeltaΔ H = -8.0 kJ mol-1; Δ\DeltaΔ S = -70 J K-1mol-1.The Δ\DeltaΔ G for the process is:

Correct AnswerverifiedShow Answer

Briefly,but clearly,explain why the -OH hydrogen in acetic acid (CH3CO2H)is more acidic than in ethanol (C2H5OH).

Correct AnswerverifiedThe greater acidity of the -OH hydrogen ...View AnswerShow Answer

What deuterium reactant would give the following product?

Correct AnswerverifiedShow Answer

A group of acids arranged in order of decreasing acidity is: HNO3 > CH3COOH > C6H5OH > H2O > HC ≡\equiv≡ CH What is the arrangement of the conjugate bases of these compounds in decreasing order of basicity?

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A product of the reaction,CH₃CH₂Li + D₂O $\to$ is

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The compound aniline,C₆H₅NH₂,has weakly basic properties in aqueous solution.In this other solvent,aniline would behave as a strong base.

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Adding methyllithium,CH₃Li,to ethanol produces:

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Which reaction will yield CH₃CH₂-D?

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Because they are con...
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Which of the following substances has a hydrogen atom with pK_a ≈ 25?

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An acid,HA,has the following thermodynamic values for its dissociation in water at 27 ºC: $\Delta$ H = -8.0 kJ mol^-1; $\Delta$ S = -70 J K^-1mol^-1.The $\Delta$ G for the process is:

Correct Answer
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Briefly,but clearly,explain why the -OH hydrogen in acetic acid (CH₃CO₂H)is more acidic than in ethanol (C₂H₅OH).

Correct Answer
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The greater acidity of the -OH hydrogen ...
View Answer

Correct Answer
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A group of acids arranged in order of decreasing acidity is: HNO₃ > CH₃COOH > C₆H₅OH > H₂O > HC $\equiv$ CH What is the arrangement of the conjugate bases of these compounds in decreasing order of basicity?

Correct Answer
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