Question 1

What is the value of the equilibrium constant, Keq, for the following reaction?

Accepted Answer

A) "109" 
B) "10-9" 
C) "9" 
D) "1/9" 
A) "109" 
B) "10-9" 
C) "9" 
D) "1/9"

Question 2

Which of the following equations is correct?

Accepted Answer

A) "$\Delta$G$\circ$ = $\Delta$H$\circ$- T$\Delta$S$\circ$" 
B) "$\Delta$H$\circ$ = $\Delta$G$\circ$- T$\Delta$S$\circ$" 
C) "$\Delta$G$\circ$ = $\Delta$H$\circ$- $\Delta$S$\circ$" 
D) "$\Delta$G$\circ$ = $\Delta$H$\circ$- $\Delta$S$\circ$/T" 
A) "$\Delta$G$\circ$ = $\Delta$H$\circ$- T$\Delta$S$\circ$" 
B) "$\Delta$H$\circ$ = $\Delta$G$\circ$- T$\Delta$S$\circ$" 
C) "$\Delta$G$\circ$ = $\Delta$H$\circ$- $\Delta$S$\circ$" 
D) "$\Delta$G$\circ$ = $\Delta$H$\circ$- $\Delta$S$\circ$/T"

Question 3

Indole is pleasant smelling in highly dilute solutions and has been used in perfumery.   When indole is placed in the presence of a strong base the nitrogen atom will be deprotonated.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following energy diagrams represents the fastest reaction?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 5

____________________ is defined by the following equation.
$\Delta$G$\circ$ = -RT ln Keq

Accepted Answer

Gibbs free

Question 6

Which of the following terms describes the role of ethanol in the acid-base reaction shown?

Accepted Answer

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

Question 7

Which of the following is the strongest acid?

Accepted Answer

A) CH3NH2 
B) CH3PH2 
C) CH3OH 
D) CH3SH 
A) CH3NH2 
B) CH3PH2 
C) CH3OH 
D) CH3SH

Question 8

The energy needed by reactants to reach the transition state is the____________________,

Accepted Answer

free energ

Question 9

Which set of curved arrows accounts for the deprotonation of an acid (A-H) by a base (:B)?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 10

The pKa of HCl is -7. What is the value of the equilibrium constant, Keq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M]

Accepted Answer

A) "1.8 * 105" 
B) "385" 
C) "1.8 * 10-5" 
D) "-1.8* 105" 
A) "1.8 * 105" 
B) "385" 
C) "1.8 * 10-5" 
D) "-1.8* 105"

Question 11

Which atom in the following structure is preferentially protonated by a strong acid?

Accepted Answer

A) i 
B) ii 
C) iii 
D) iv 
A) i 
B) ii 
C) iii 
D) iv

Question 12

Which species is the conjugate acid in the following acid-base reaction?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 13

Which of the following terms describes the role of ethene in the acid-base reaction shown?

Accepted Answer

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

Question 14

Use curved arrows to show the movement of pairs of electrons in the following reaction between a Lewis acid and a Lewis base, and show the structure of the product.

Accepted Answer

The answer of Use curved arrows to show the movement...

Question 15

Which of the following has the highest bond dissociation energy?

Accepted Answer

A) HF 
B) HCl 
C) HBr 
D) HI 
A) HF 
B) HCl 
C) HBr 
D) HI

Question 16

Consider the following reaction coordinate diagram.   The transition state is represented by the letter B.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following terms describes the reactivity of boron tribromide, BBr3?

Accepted Answer

A) Brønsted-Lowry acid and Lewis acid 
B) Brønsted-Lowry base and Lewis base 
C) Lewis acid and not a Brønsted-Lowry acid 
D) Lewis base and not a Brønsted-Lowry base 
A) Brønsted-Lowry acid and Lewis acid 
B) Brønsted-Lowry base and Lewis base 
C) Lewis acid and not a Brønsted-Lowry acid 
D) Lewis base and not a Brønsted-Lowry base

Question 18

The following is generic depiction of a reaction using the curve arrow formalism.   In this reaction electrons move from C to B and A will have a positive charge in the product.

Accepted Answer

A) True 
 B)False

Question 19

Provide the equation for the acid dissociate constant, Ka,for the following equilibrium.

Accepted Answer

Question 20

What is the value of the equilibrium constant for the following equilibrium?

Accepted Answer

log₁₀K_eq = pK_a(acid) - pK

Exam 4: Acids and Bases

What is the value of the equilibrium constant, Keq, for the following reaction?

Which of the following equations is correct?

Indole is pleasant smelling in highly dilute solutions and has been used in perfumery. When indole is placed in the presence of a strong base the nitrogen atom will be deprotonated.

Which of the following energy diagrams represents the fastest reaction?

____________________ is defined by the following equation. Δ\DeltaΔ G ∘\circ∘ = -RT ln Keq

Which of the following terms describes the role of ethanol in the acid-base reaction shown?

Which of the following is the strongest acid?

The energy needed by reactants to reach the transition state is the____________________,

Which set of curved arrows accounts for the deprotonation of an acid (A-H) by a base (:B)?

The pKa of HCl is -7. What is the value of the equilibrium constant, Keq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M]

Which atom in the following structure is preferentially protonated by a strong acid?

Which species is the conjugate acid in the following acid-base reaction?

Which of the following terms describes the role of ethene in the acid-base reaction shown?

Use curved arrows to show the movement of pairs of electrons in the following reaction between a Lewis acid and a Lewis base, and show the structure of the product.

Which of the following has the highest bond dissociation energy?

Consider the following reaction coordinate diagram. The transition state is represented by the letter B.

Which of the following terms describes the reactivity of boron tribromide, BBr3?

The following is generic depiction of a reaction using the curve arrow formalism. In this reaction electrons move from C to B and A will have a positive charge in the product.

Provide the equation for the acid dissociate constant, Ka,for the following equilibrium.

What is the value of the equilibrium constant for the following equilibrium?

Covalent Bonding and Shapes of Molecules

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

What is the value of the equilibrium constant, K_eq, for the following reaction?

____________________ is defined by the following equation. $\Delta$ G^$\circ$ = -RT ln K_eq

The pK_a of HCl is -7. What is the value of the equilibrium constant, K_eq, for the following equilibrium? [The concentration of water in a dilute aqueous solution is 55 M]

Which of the following terms describes the reactivity of boron tribromide, BBr₃?

Provide the equation for the acid dissociate constant, K_a,for the following equilibrium.