Question 1

Which sequence ranks the indicated protons in order of increasing acidity?

Accepted Answer

A)  1<2<3 
B)  2<1<3 
C)  1<3<2 
D)  3<2<1 
A)  1<2<3 
B)  2<1<3 
C)  1<3<2 
D)  3<2<1 B

Question 2

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Accepted Answer

Question 3

Draw an acceptable line-angle formula for cyclobutanol (shown below).

Accepted Answer

The answer of Draw an acceptable line-angle formula for cyclobutanol...

Question 4

Draw a correct Lewis structure for chloromethane, CH3Cl, including all non-bonding lone pairs.

Accepted Answer

Question 5

Provide a Lewis structure for a molecule with molecular formula CH2O2.

Accepted Answer

Question 6

Draw the shape of a 2p orbital, including shading to indicate phase.

Accepted Answer

The answer of Draw the shape of a 2p orbital,...

Question 7

Draw a correct Lewis structure for acetaldehyde, CH3CHO.

Accepted Answer

Question 8

Provide the Lewis structure of the conjugate acid of ethanol (CH3CH2OH).

Accepted Answer

Question 9

Methanol has a pKa of 15.5. Calculate its Ka.

Accepted Answer

The answer of Methanol has a pKa of 15.5. Calculate...

Question 10

Draw the complete Lewis structure for the compound whose condensed formula is (CH3)2CHCHO.

Accepted Answer

Question 11

Structures ________, shown below, are resonance structures, and structure ________ is the major contributor to the overall resonance hybrid.

Accepted Answer

A)  2 & 4; 2 
B)  1, 3 & 5; 3 
C)  4 & 6; 6 
D)  1, 3 & 5; 1 
E)  1, 3, 4 & 5; 3 
A)  2 & 4; 2 
B)  1, 3 & 5; 3 
C)  4 & 6; 6 
D)  1, 3 & 5; 1 
E)  1, 3, 4 & 5; 3

Question 12

Draw a correct Lewis structure for acetonitrile, CH3CN, including all non-bonding lone pairs.

Accepted Answer

Question 13

When a negatively charged species is most appropriately depicted as a hybrid of several resonance forms, the negative charge present is considered to be rapidly moving between the resonance forms bearing the formal negative charge.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following molecules contains a polar covalent bond?

Accepted Answer

A)  H2 
B)  F2 
C)  CH3Cl 
D)  NaCl 
E)  He 
A)  H2 
B)  F2 
C)  CH3Cl 
D)  NaCl 
E)  He

Question 15

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 16

In the following acid/base reaction, label the acid, base, conjugate acid and conjugate base.
HCl + H2O → H3O+ + Cl-

Accepted Answer

Question 17

Provide the line-angle formula for the alcohol CH3CH2CH(OH)CH2CH2CH(CH3)2.

Accepted Answer

Question 18

Which is more acidic, HF or HI? Explain.

Accepted Answer

HI is more acidic. As a conjug

Question 19

According to the Lewis definition, which of the following may act as acids?

Accepted Answer

A)  NH3 
B)  HCl 
C)  AlCl3 
D)  A & B 
E)  A, B, & C 
A)  NH3 
B)  HCl 
C)  AlCl3 
D)  A & B 
E)  A, B, & C

Question 20

The compound methylamine, CH3NH2, contains a C-N bond. In this bond, which of the following best describes the charge on the carbon atom?

Accepted Answer

A)  +1 
B)  slightly positive 
C)  neutral 
D)  slightly negative 
E)  -1 
A)  +1 
B)  slightly positive 
C)  neutral 
D)  slightly negative 
E)  -1

Exam 1: Structure and Bonding

Which sequence ranks the indicated protons in order of increasing acidity?

Provide the structure of the conjugate acid of ethanamine (CH3CH2NH2)

Draw an acceptable line-angle formula for cyclobutanol (shown below).

Draw a correct Lewis structure for chloromethane, CH3Cl, including all non-bonding lone pairs.

Provide a Lewis structure for a molecule with molecular formula CH2O2.

Draw the shape of a 2p orbital, including shading to indicate phase.

Draw a correct Lewis structure for acetaldehyde, CH3CHO.

Provide the Lewis structure of the conjugate acid of ethanol (CH3CH2OH).

Methanol has a pKa of 15.5. Calculate its Ka.

Draw the complete Lewis structure for the compound whose condensed formula is (CH3)2CHCHO.

Structures ________, shown below, are resonance structures, and structure ________ is the major contributor to the overall resonance hybrid.

Draw a correct Lewis structure for acetonitrile, CH3CN, including all non-bonding lone pairs.

When a negatively charged species is most appropriately depicted as a hybrid of several resonance forms, the negative charge present is considered to be rapidly moving between the resonance forms bearing the formal negative charge.

Which of the following molecules contains a polar covalent bond?

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

In the following acid/base reaction, label the acid, base, conjugate acid and conjugate base. HCl + H2O → H3O+ + Cl-

Provide the line-angle formula for the alcohol CH3CH2CH(OH)CH2CH2CH(CH3)2.

Which is more acidic, HF or HI? Explain.

According to the Lewis definition, which of the following may act as acids?

The compound methylamine, CH3NH2, contains a C-N bond. In this bond, which of the following best describes the charge on the carbon atom?

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Provide the structure of the conjugate acid of ethanamine (CH₃CH₂NH₂)

Draw a correct Lewis structure for chloromethane, CH₃Cl, including all non-bonding lone pairs.

Provide a Lewis structure for a molecule with molecular formula CH₂O₂.

Draw a correct Lewis structure for acetaldehyde, CH₃CHO.

Provide the Lewis structure of the conjugate acid of ethanol (CH₃CH₂OH).

Draw the complete Lewis structure for the compound whose condensed formula is (CH₃)₂CHCHO.

Structures , shown below, are resonance structures, and structure is the major contributor to the overall resonance hybrid.

Draw a correct Lewis structure for acetonitrile, CH₃CN, including all non-bonding lone pairs.

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

In the following acid/base reaction, label the acid, base, conjugate acid and conjugate base. HCl + H₂O → H₃O⁺ + Cl^-

Provide the line-angle formula for the alcohol CH₃CH₂CH(OH)CH₂CH₂CH(CH₃)₂.

The compound methylamine, CH₃NH₂, contains a C-N bond. In this bond, which of the following best describes the charge on the carbon atom?