Question 1

What is the role of methylchloride (CH3Cl) in the following reaction? 3Cl) in the following reaction?   A) Lewis acid B) Lewis base C) Brønsted-Lowry acid D) Brønsted-Lowry base" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Lewis acid
B)  Lewis base
C)  Brønsted-Lowry acid
D)  Brønsted-Lowry baseE) A) and D)
F) All of the above

Question 2

Rank the following conjugate bases in order of decreasing basicity,putting the most basic first.  I > III B) I > II > III C) III > I > II D) III > II > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 3

Which of the following compounds has the lowest pKa?

Accepted Answer

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

Question 4

Consider the following structures I-IV.Which two species represent a conjugate acid-base pair?

Accepted Answer

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

Question 5

What is the correct rank of the following compounds in order of increasing acidity?  II > III > IV B) IV > III > II > I C) IV > I > II > III D) III > I > IV > II" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

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) B) and C)
F) A) and D)

Question 8

Which of the following compounds is the strongest acid?

Accepted Answer

A)  CH3OH
B)  BrCH2OH
C)  CH3NH2
D)  CH3ClE) A) and B)
F) All of the above

Question 9

What is the conjugate base of HSO4-? SO42- H2SO4 SO3 H2O
I II III IV

Accepted Answer

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

Question 10

Which of the following compounds is both a Brønsted-Lowry acid and base?

Accepted Answer

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

Question 11

Which of the following statements about Brønsted-Lowry acids and bases is true?

Accepted Answer

A)  Loss of a proton from a base forms its conjugate acid.
B)  Loss of a proton from an acid forms its conjugate base.
C)  Gain of a proton by an acid forms its conjugate base.
D)  Brønsted-Lowry acid-base reactions always result in the transfer of a proton from a base to an acid.E) A) and D)
F) A) and C)

Question 12

Which of the following compounds is the weakest acid?

Accepted Answer

A)  H2S
B)  PH3
C)  HCl
D)  SiH4E) B) and C)
F) B) and D)

Question 13

Which of the following compounds is not a Lewis acid?

Accepted Answer

A)  AlCl3
B)  HCl
C)  H2O
D)  CBr4E) C) and D)
F) B) and D)

Question 14

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) B) and D)
F) A) and C)

Question 15

What is the nucleophilic site in the following compounds?

Accepted Answer

A)  I = Hydrogen; II = π electrons in bond; III = nitrogen.
B)  I = Oxygen; II = carbon; III = nitrogen.
C)  I = Hydrogen; II = carbon; III = carbon.
D)  I = Oxygen; II = π electrons in bond; III = nitrogen.E) All of the above
F) None of the above

Question 16

Which of the following compounds is the weakest acid?

Accepted Answer

A)  HF
B)  HCl
C)  HBr
D)  HIE) B) and C)
F) A) and B)

Question 17

Which of the following is a Lewis acid but not a Brønsted-Lowry acid?

Accepted Answer

A)  CH3OH
B)  H2O
C)  CH3COOH
D)  BF3E) B) and C)
F) A) and D)

Question 18

Which of the following statements explain why HBr is a stronger acid than HF?

Accepted Answer

A)  Br- is more stable than F- because Br- is larger than F-.
B)  Br- is less stable than F- because Br- is larger than F-.
C)  Br- is more stable than F- because Br- is less electronegative than F-.
D)  Br- is less stable than F- because Br- is less electronegative than F-.E) A) and B)
F) None of the above

Question 19

Which of the following species is the conjugate base of methanol,CH3OH?

Accepted Answer

A)  CH3OH2+
B)  CH3O-
C)  CH3-
D)  CH4E) None of the above
F) A) and D)

Question 20

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) B) and C)
F) A) and B)

Exam 2: Acids and Bases

Which of the following is a Lewis acid but not a Brønsted-Lowry acid?

Correct AnswerverifiedShow Answer

Which of the following compounds is not a Lewis acid?

Correct AnswerverifiedShow Answer

Which of the following compounds is the strongest acid?

Correct AnswerverifiedShow Answer

What is the conjugate base of HSO4-? SO42- H2SO4 SO3 H2O I II III IV

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following compounds is the weakest acid?

Correct AnswerverifiedShow Answer

Which of the following statements about acid strength is true?

Correct AnswerverifiedShow Answer

Which of the following compounds has the lowest pKa?

Correct AnswerverifiedShow Answer

Which of the following compounds is the weakest acid?

Correct AnswerverifiedShow Answer

Rank the following conjugate bases in order of decreasing basicity,putting the most basic first.

Correct AnswerverifiedShow Answer

Which of the following statements explain why HBr is a stronger acid than HF?

Correct AnswerverifiedShow Answer

Consider the following structures I-IV.Which two species represent a conjugate acid-base pair?

Correct AnswerverifiedShow Answer

What is the role of methylchloride (CH3Cl) in the following reaction?

Correct AnswerverifiedShow Answer

What is the correct rank of the following compounds in order of increasing acidity?

Correct AnswerverifiedShow Answer

What is the nucleophilic site in the following compounds?

Correct AnswerverifiedShow Answer

Which of the following species is the conjugate base of methanol,CH3OH?

Correct AnswerverifiedShow Answer

Which of the following statements about Brønsted-Lowry acids and bases is true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following compounds is both a Brønsted-Lowry acid and base?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the conjugate base of HSO₄^-? SO₄^2- H₂SO₄ SO₃ H₂O I II III IV

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following compounds has the lowest pK_a?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the role of methylchloride (CH₃Cl) in the following reaction?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of the following species is the conjugate base of methanol,CH₃OH?

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified