Question 1

Identify the nucleophilic and electrophilic sites in the reactants of the following reaction.

Accepted Answer

@#IMG-DLM&_TB4454_00 6.10 Desc

Question 2

Draw arrows for each step of the following reaction.

Accepted Answer

The answer of Draw arrows for each step of the...

Question 3

Of following reactions, which one(s) would you expect to have a negative ∆S?

Accepted Answer

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

Question 4

Draw an energy diagram for an endothermic reaction with two steps.

Accepted Answer

The answer of Draw an energy diagram for an endothermic...

Question 5

Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT

Accepted Answer

A)  positive 
B)  negative 
C)  no change 
A)  positive 
B)  negative 
C)  no change

Question 6

What is the effect of a catalyst on a reaction?

Accepted Answer

A)  It increases the rate. 
B)  It decreases the entropy. 
C)  It changes the equilibrium. 
D)  It makes the products more stable. 
A)  It increases the rate. 
B)  It decreases the entropy. 
C)  It changes the equilibrium. 
D)  It makes the products more stable.

Question 7

Identify the arrow in the following equation.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 8

Which of the following energy diagrams shows the reaction with the smallest energy of activation?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 9

What is wrong with the following mechanism?

Accepted Answer

A)  There is no leaving group, so there should be no arrows. 
B)  The arrow should be removing a proton from the H2O group. 
C)  An arrow is also needed to indicate the loss of the leaving group. 
D)  The arrow is backwards. 
A)  There is no leaving group, so there should be no arrows. 
B)  The arrow should be removing a proton from the H2O group. 
C)  An arrow is also needed to indicate the loss of the leaving group. 
D)  The arrow is backwards.

Question 10

Based on the following energy diagram, is the reaction exothermic or endothermic?

Accepted Answer

The answer of Based on the following energy diagram, is...

Question 11

Identify the nucleophilic site(s) in the following molecule.

Accepted Answer

The answer of Identify the nucleophilic site(s) in the following...

Question 12

Based on the following energy diagram, is the reaction exothermic or endothermic?

Accepted Answer

The answer of Based on the following energy diagram, is...

Question 13

Draw an energy diagram for a concerted exothermic reaction.

Accepted Answer

The answer of Draw an energy diagram for a concerted...

Question 14

Predict the sign of ∆G for an exothermic reaction with an increase in entropy.

Accepted Answer

A)  positive 
B)  negative 
C)  no change 
D)  cannot predict without additional information 
A)  positive 
B)  negative 
C)  no change 
D)  cannot predict without additional information

Question 15

Does a reaction with a positive ∆G favor reactants or products?

Accepted Answer

The answer of Does a reaction with a positive ∆G...

Question 16

Which of the following indicates a reaction with a positive ∆G?

Accepted Answer

A)  endergonic, spontaneous 
B)  endergonic, not spontaneous 
C)  exergonic, spontaneous 
D)  exergonic, not spontaneous 
A)  endergonic, spontaneous 
B)  endergonic, not spontaneous 
C)  exergonic, spontaneous 
D)  exergonic, not spontaneous

Exam 6: Chemical Reactivity and Mechanisms

Identify the nucleophilic and electrophilic sites in the reactants of the following reaction.

Draw arrows for each step of the following reaction.

Of following reactions, which one(s) would you expect to have a negative ∆S?

Draw an energy diagram for an endothermic reaction with two steps.

Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT

What is the effect of a catalyst on a reaction?

Identify the arrow in the following equation.

Which of the following energy diagrams shows the reaction with the smallest energy of activation?

What is wrong with the following mechanism?

Based on the following energy diagram, is the reaction exothermic or endothermic?

Identify the nucleophilic site(s) in the following molecule.

Based on the following energy diagram, is the reaction exothermic or endothermic?

Draw an energy diagram for a concerted exothermic reaction.

Predict the sign of ∆G for an exothermic reaction with an increase in entropy.

Does a reaction with a positive ∆G favor reactants or products?

Which of the following indicates a reaction with a positive ∆G?

A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Conjugated Pi Systems and Pericyclic Reactions

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Introduction to Organometallic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT $Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT$ $Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT$