Question 1

What is the direction of equilibrium when acetylene (C2H2) reacts with ethoxide (CH3CH2O-) in an acid-base reaction?

Accepted Answer

A) Left 
B) Right 
C) Neither 
D) Cannot be determined 
A) Left 
B) Right 
C) Neither 
D) Cannot be determined A

Question 2

Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH3COOH) and ethanol (CH3CH2OH)?

Accepted Answer

A) Hybridization 
B) Electronegativity 
C) Resonance 
D) Size 
A) Hybridization 
B) Electronegativity 
C) Resonance 
D) Size C

Question 3

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

Accepted Answer

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

Question 4

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. 
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.

Question 5

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, IV 
A) I, II 
B) I, III 
C) II, IV 
D) I, IV

Question 6

What are the products of the following proton transfer reaction?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 7

Which of the following compounds is not a Lewis acid?

Accepted Answer

A) AlCl3 
B) HCl 
C) H2O 
D) CBr4 
A) AlCl3 
B) HCl 
C) H2O 
D) CBr4

Question 8

Rank the following compounds in order of decreasing acidity, putting the most acidic first.

Accepted Answer

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

Question 9

Which of the following concepts can be used to explain the difference in acidity between ethanol (CH3CH2OH) and 2-fluoroethanol (FCH2CH2OH)?

Accepted Answer

A) Size 
B) Inductive effect 
C) Resonance 
D) Hybridization 
A) Size 
B) Inductive effect 
C) Resonance 
D) Hybridization

Question 10

Which of the following statements about Lewis bases is true?

Accepted Answer

A) Lewis bases are electron pair acceptors. 
B) Lewis bases are electron pair donors. 
C) Lewis bases are proton donors. 
D) Lewis bases are proton acceptors. 
A) Lewis bases are electron pair acceptors. 
B) Lewis bases are electron pair donors. 
C) Lewis bases are proton donors. 
D) Lewis bases are proton acceptors.

Question 11

What is the direction of equilibrium when acetylene (C2H2) reacts with H2N- in an acid-base reaction?

Accepted Answer

A) Left 
B) Right 
C) Neither 
D) Cannot be determined 
A) Left 
B) Right 
C) Neither 
D) Cannot be determined

Question 12

Consider the following molecule with protons labeled, I-III.Rank these protons in order of decreasing acidity, putting the most acidic first.

Accepted Answer

A) I > II > III 
B) I > III > II 
C) III > II > I 
D) III > I > II 
A) I > II > III 
B) I > III > II 
C) III > II > I 
D) III > I > II

Question 13

Which of the following species is not a Brønsted-Lowry base?

Accepted Answer

A) BF3 
B) NH3 
C) H2O 
D) PO43- 
A) BF3 
B) NH3 
C) H2O 
D) PO43-

Question 14

Which of the following compounds is the strongest acid?

Accepted Answer

A) CH3OH 
B) BrCH2OH 
C) CH3NH2 
D) CH3Cl 
A) CH3OH 
B) BrCH2OH 
C) CH3NH2 
D) CH3Cl

Question 15

Rank the following conjugate bases in order of increasing basicity, putting the least basic first.

Accepted Answer

A) II < I < III 
B) II < III < I 
C) I < II < III 
D) I < III < II 
A) II < I < III 
B) II < III < I 
C) I < II < III 
D) I < III < II

Question 16

Which of the following ranks the compounds in order of increasing basicity, putting the least basic first?

Accepted Answer

A) CH3NH2 3OH 4 
B) CH3OH 3NH2 4 
C) CH4 3NH2 3OH 
D) CH4 3OH 3NH2 
A) CH3NH2 3OH 4 
B) CH3OH 3NH2 4 
C) CH4 3NH2 3OH 
D) CH4 3OH 3NH2

Question 17

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

Accepted Answer

A) I < IV < III < II 
B) I < III < IV < II 
C) II < III < IV < I 
D) II < IV < III < I 
A) I < IV < III < II 
B) I < III < IV < II 
C) II < III < IV < I 
D) II < IV < III < I

Question 18

Which of the following species cannot act as both a Brønsted-Lowry acid and base?

Accepted Answer

A) HCO3- 
B) HSO4- 
C) HO- 
D) H2PO4- 
A) HCO3- 
B) HSO4- 
C) HO- 
D) H2PO4-

Question 19

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

Accepted Answer

A) Lewis acid 
B) Lewis base 
C) Brønsted-Lowry acid 
D) Brønsted-Lowry base 
A) Lewis acid 
B) Lewis base 
C) Brønsted-Lowry acid 
D) Brønsted-Lowry base

Question 20

Which of the following species is the strongest base?

Accepted Answer

A) HO- 
B) H2N- 
C) CH3COO- 
D) Cl- 
A) HO- 
B) H2N- 
C) CH3COO- 
D) Cl-

Exam 2: Acids and Bases

What is the direction of equilibrium when acetylene (C2H2) reacts with ethoxide (CH3CH2O-) in an acid-base reaction?

Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH3COOH) and ethanol (CH3CH2OH)?

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

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

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

What are the products of the following proton transfer reaction?

Which of the following compounds is not a Lewis acid?

Rank the following compounds in order of decreasing acidity, putting the most acidic first.

Which of the following concepts can be used to explain the difference in acidity between ethanol (CH3CH2OH) and 2-fluoroethanol (FCH2CH2OH)?

Which of the following statements about Lewis bases is true?

What is the direction of equilibrium when acetylene (C2H2) reacts with H2N- in an acid-base reaction?

Consider the following molecule with protons labeled, I-III.Rank these protons in order of decreasing acidity, putting the most acidic first.

Which of the following species is not a Brønsted-Lowry base?

Which of the following compounds is the strongest acid?

Rank the following conjugate bases in order of increasing basicity, putting the least basic first.

Which of the following ranks the compounds in order of increasing basicity, putting the least basic first?

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

Which of the following species cannot act as both a Brønsted-Lowry acid and base?

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

Which of the following species is the strongest base?

Structure and Bonding

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols, Ethers, and Related Compounds

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry;

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Filters

What is the direction of equilibrium when acetylene (C₂H₂) reacts with ethoxide (CH₃CH₂O^-) in an acid-base reaction?

Which of the following concepts can be used to explain the difference in acidity between acetic acid (CH₃COOH) and ethanol (CH₃CH₂OH)?

Which of the following concepts can be used to explain the difference in acidity between ethanol (CH₃CH₂OH) and 2-fluoroethanol (FCH₂CH₂OH)?

What is the direction of equilibrium when acetylene (C₂H₂) reacts with H₂N^- in an acid-base reaction?

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