Question 1

What physical property and reaction type are used by extraction as useful techniques to separate and purify mixtures of compounds?

Accepted Answer

A) Physical property = solubility differences; reaction type = acid-base reaction 
B) Physical property = boiling point; reaction type = acid-base reaction 
C) Physical property = solubility differences; reaction type = oxidation-reduction 
D) Physical property = density; reaction type = oxidation-reduction 
A) Physical property = solubility differences; reaction type = acid-base reaction 
B) Physical property = boiling point; reaction type = acid-base reaction 
C) Physical property = solubility differences; reaction type = oxidation-reduction 
D) Physical property = density; reaction type = oxidation-reduction

Question 2

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

Accepted Answer

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

Question 3

Which of the following compounds is most basic?

Accepted Answer

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

Question 4

What is the overall charge of the amino acid,alanine,at pH = 10?

Accepted Answer

A) + 1 
B) - 1 
C) No overall charge 
D) - 2 
A) + 1 
B) - 1 
C) No overall charge 
D) - 2

Question 5

Why is pure acetic acid often called glacial acetic acid?

Accepted Answer

A) Because it freezes just below 0°C,forming white crystals 
B) Because it freezes just below 100°C,forming white crystals 
C) Because it freezes just below room temperature,forming white crystals 
D) Because it freezes just above room temperature,forming white crystals 
A) Because it freezes just below 0°C,forming white crystals 
B) Because it freezes just below 100°C,forming white crystals 
C) Because it freezes just below room temperature,forming white crystals 
D) Because it freezes just above room temperature,forming white crystals

Question 6

Arrange the following compounds in order of increasing boiling point,putting the compound with the lowest boiling point first.

Accepted Answer

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

Question 7

What is the hybridization of the carbon atom in a carboxy group?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) p 
A) sp 
B) sp2 
C) sp3 
D) p

Question 8

What would happen if a mixture of benzoic acid (C6H5COOH)and NaCl is added to a separatory funnel containing H2O and CH2Cl2?

Accepted Answer

A) The benzoic acid would dissolve in the water layer and the NaCl would dissolve in the organic layer. 
B) The benzoic acid would dissolve in the organic layer and the NaCl would dissolve in the water layer. 
C) Both benzoic acid and NaCl would dissolve in the organic layer. 
D) Both benzoic acid and NaCl would dissolve in the water layer. 
A) The benzoic acid would dissolve in the water layer and the NaCl would dissolve in the organic layer. 
B) The benzoic acid would dissolve in the organic layer and the NaCl would dissolve in the water layer. 
C) Both benzoic acid and NaCl would dissolve in the organic layer. 
D) Both benzoic acid and NaCl would dissolve in the water layer.

Question 9

Which of the following compounds is least basic?

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

Give the IUPAC name for the following compound.

Accepted Answer

A) (E,R)-2-bromo-3-pentenoic acid 
B) (Z,R)-2-bromo-3-pentenoic acid 
C) (E,S)-2-bromo-3-pentenoic acid 
D) (Z,S)-2-bromo-3-pentenoic acid 
A) (E,R)-2-bromo-3-pentenoic acid 
B) (Z,R)-2-bromo-3-pentenoic acid 
C) (E,S)-2-bromo-3-pentenoic acid 
D) (Z,S)-2-bromo-3-pentenoic acid

Question 12

What is the overall charge of the amino acid,alanine,at pH = 7?

Accepted Answer

A) + 1 
B) - 1 
C) No overall charge 
D) + 2 
A) + 1 
B) - 1 
C) No overall charge 
D) + 2

Question 13

What two strong absorptions are characteristic of the IR spectrum of carboxylic acids?

Accepted Answer

A) A C=O absorption at 1710 cm-1 and a C-H absorption at 3000 cm-1. 
B) A C=O absorption at 1710 cm-1 and an O-H absorption at 2500-3500 cm-1. 
C) A C=O absorption at 1600 cm-1 and an O-H absorption at 2500-3000 cm-1. 
D) A C-O absorption at 1500 cm-1 and an O-H absorption at 2500-3500 cm-1. 
A) A C=O absorption at 1710 cm-1 and a C-H absorption at 3000 cm-1. 
B) A C=O absorption at 1710 cm-1 and an O-H absorption at 2500-3500 cm-1. 
C) A C=O absorption at 1600 cm-1 and an O-H absorption at 2500-3000 cm-1. 
D) A C-O absorption at 1500 cm-1 and an O-H absorption at 2500-3500 cm-1.

Exam 19: Carboxylic Acids and the Acidity of the O-H Bond

What physical property and reaction type are used by extraction as useful techniques to separate and purify mixtures of compounds?

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

Which of the following compounds is most basic?

What is the overall charge of the amino acid,alanine,at pH = 10?

Why is pure acetic acid often called glacial acetic acid?

Arrange the following compounds in order of increasing boiling point,putting the compound with the lowest boiling point first.

What is the hybridization of the carbon atom in a carboxy group?

What would happen if a mixture of benzoic acid (C6H5COOH)and NaCl is added to a separatory funnel containing H2O and CH2Cl2?

Which of the following compounds is least basic?

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

Give the IUPAC name for the following compound.

What is the overall charge of the amino acid,alanine,at pH = 7?

What two strong absorptions are characteristic of the IR spectrum of carboxylic acids?

Structure and Bonding

Acids and Bases

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 and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Carbohydrates

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

Filters

What would happen if a mixture of benzoic acid (C₆H₅COOH)and NaCl is added to a separatory funnel containing H₂O and CH₂Cl₂?