Question 1

According to Lewis theory,a base is a substance that can ___.

Accepted Answer

donate a l

Question 2

Which of these is not a diprotic acid?

Accepted Answer

A) H2S 
B) H2SO4 
C) (COOH)2 
D) H2PO4- 
E) All of these choices are diprotic. 
A) H2S 
B) H2SO4 
C) (COOH)2 
D) H2PO4- 
E) All of these choices are diprotic.

Question 3

The compounds ethane,ethene,and ethyne exhibit this order of increasing acidity:

Accepted Answer

A) Ethyne < ethene < ethane 
B) Ethene < ethyne < ethane 
C) Ethane < ethyne < ethene 
D) Ethane < ethene < ethyne 
E) Ethene < ethane < ethyne 
A) Ethyne < ethene < ethane 
B) Ethene < ethyne < ethane 
C) Ethane < ethyne < ethene 
D) Ethane < ethene < ethyne 
E) Ethene < ethane < ethyne

Question 4

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

Accepted Answer

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

Question 5

For the following acid / base reaction which statement is true taking $\Delta$H into consideration?

Accepted Answer

A) The reaction is an exothermic reaction and $\Delta$H is approximately zero. 
B) The reaction is an endothermic reaction and $\Delta$H is negative. 
C) The reaction is an exothermic reaction and $\Delta$H is negative. 
D) The reaction is an exothermic reaction and $\Delta$H is positive. 
E) None of these choices. 
A) The reaction is an exothermic reaction and $\Delta$H is approximately zero. 
B) The reaction is an endothermic reaction and $\Delta$H is negative. 
C) The reaction is an exothermic reaction and $\Delta$H is negative. 
D) The reaction is an exothermic reaction and $\Delta$H is positive. 
E) None of these choices.

Question 6

Which of the following organic compounds has the strongest conjugate base?

Accepted Answer

A) C6H12 pKa = 52 
B) CH3CH3 pKa = 50 
C) CH3CH2OH pKa = 18 
D) CH3CO2H pKa = 5 
E) CF3CO2H pKa = 0 
A) C6H12 pKa = 52 
B) CH3CH3 pKa = 50 
C) CH3CH2OH pKa = 18 
D) CH3CO2H pKa = 5 
E) CF3CO2H pKa = 0

Question 7

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

Accepted Answer

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

Question 8

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

Accepted Answer

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

Question 9

What reactants would give the following products?

Accepted Answer

A)    
B)    
C)    
D)    
E) None of these choices. 
A)    
B)    
C)    
D)    
E) None of these choices.

Question 10

Which of the following correctly lists the compounds in order of decreasing acidity?

Accepted Answer

A) H2O > HC$\equiv$CH > NH3 > CH3CH3 
B) HC$\equiv$H > H2O > NH3 > CH3CH3 
C) CH3CH3 > HC$\equiv$CH > NH3 > H2O 
D) CH3CH3 > HC$\equiv$CH > H2O > NH3 
E) H2O > NH3 > HC$\equiv$CH > CH3CH3 
A) H2O > HC$\equiv$CH > NH3 > CH3CH3 
B) HC$\equiv$H > H2O > NH3 > CH3CH3 
C) CH3CH3 > HC$\equiv$CH > NH3 > H2O 
D) CH3CH3 > HC$\equiv$CH > H2O > NH3 
E) H2O > NH3 > HC$\equiv$CH > CH3CH3

Question 11

In order for an acid-base reaction to take place the pKa of the acid must be higher than the pKa of the conjugate acid of the base.

Accepted Answer

A) True 
 B)False

Question 12

A conjugate base of sulfuric acid is:

Accepted Answer

A) H3SO4+ 
B) SO3 
C) HSO4- 
D) H2SO3 
E) HSO3- 
A) H3SO4+ 
B) SO3 
C) HSO4- 
D) H2SO3 
E) HSO3-

Question 13

What does the reaction between the following two species produce?

Accepted Answer

A)    
B)    
C)    
D)    
E) No reaction 
A)    
B)    
C)    
D)    
E) No reaction

Question 14

Which combination of reagents is effective in generating sodium ethoxide,CH3CH2ONa?

Accepted Answer

A) CH3CH2OH + NaH 
B) CH3CH2OH + NaNH2 
C) CH3CH2OH + Na 
D) Two of these choices. 
E) All of these choices. 
A) CH3CH2OH + NaH 
B) CH3CH2OH + NaNH2 
C) CH3CH2OH + Na 
D) Two of these choices. 
E) All of these choices.

Question 15

Consider the equilibrium     Which are the Bronsted-Lowry bases?

Accepted Answer

A) PO43- and HPO42- 
B) PO43- and OH- 
C) PO43- and H2O 
D) H2O and OH- 
E) H2O and HPO42- 
A) PO43- and HPO42- 
B) PO43- and OH- 
C) PO43- and H2O 
D) H2O and OH- 
E) H2O and HPO42-

Question 16

What is/are the product(s)of the following acid-base mechanism?

Accepted Answer

A)    
B)    
C)    
D)    
E) None of these choices. 
A)    
B)    
C)    
D)    
E) None of these choices.

Question 17

Which is the strongest acid?

Accepted Answer

A) CH3CH2CH2CH2CHFCO2H 
B) CH3CHBrCH2CH2CH2CO2H 
C) CH3CH2CH2CHClCH2CO2H 
D) CH3CH2CH2CHFCH2CO2H 
E) CH3CH2CH2CHICH2CO2H 
A) CH3CH2CH2CH2CHFCO2H 
B) CH3CHBrCH2CH2CH2CO2H 
C) CH3CH2CH2CHClCH2CO2H 
D) CH3CH2CH2CHFCH2CO2H 
E) CH3CH2CH2CHICH2CO2H

Question 18

For the following acid-base reaction,which statement is true taking $\Delta$H into consideration?

Accepted Answer

A) The reaction is an exothermic reaction and $\Delta$H is approximately zero. 
B) The reaction is an endothermic reaction and $\Delta$H is negative. 
C) The reaction is an endothermic reaction and $\Delta$H is positive. 
D) The reaction is an exothermic reaction and $\Delta$H is negative. 
E) None of these choices. 
A) The reaction is an exothermic reaction and $\Delta$H is approximately zero. 
B) The reaction is an endothermic reaction and $\Delta$H is negative. 
C) The reaction is an endothermic reaction and $\Delta$H is positive. 
D) The reaction is an exothermic reaction and $\Delta$H is negative. 
E) None of these choices.

Question 19

Bond polarization that takes place through space and through the bonds of the molecule is called the ___.

Accepted Answer

The answer of Bond polarization that takes place through space...

Question 20

Acetic acid dissociates most completely in:

Accepted Answer

A) CCl4 
B) Cl2C=CCl2 
C) H2O 
D) (CH3CH2)2O 
E) the gas phase 
A) CCl4 
B) Cl2C=CCl2 
C) H2O 
D) (CH3CH2)2O 
E) the gas phase

Exam 3: Acids and Bases

According to Lewis theory,a base is a substance that can ___.

Which of these is not a diprotic acid?

The compounds ethane,ethene,and ethyne exhibit this order of increasing acidity:

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

For the following acid / base reaction which statement is true taking Δ\DeltaΔ H into consideration?

Which of the following organic compounds has the strongest conjugate base?

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.

What reactants would give the following products?

Which of the following correctly lists the compounds in order of decreasing acidity?

In order for an acid-base reaction to take place the pKa of the acid must be higher than the pKa of the conjugate acid of the base.

A conjugate base of sulfuric acid is:

What does the reaction between the following two species produce?

Which combination of reagents is effective in generating sodium ethoxide,CH3CH2ONa?

Consider the equilibrium Which are the Bronsted-Lowry bases?

What is/are the product(s)of the following acid-base mechanism?

Which is the strongest acid?

For the following acid-base reaction,which statement is true taking Δ\DeltaΔ H into consideration?

Bond polarization that takes place through space and through the bonds of the molecule is called the ___.

Acetic acid dissociates most completely in:

The Basics

Families of Carbon

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

For the following acid / base reaction which statement is true taking $\Delta$ H into consideration? $For the following acid / base reaction which statement is true taking \Delta H into consideration?$

In order for an acid-base reaction to take place the pK_a of the acid must be higher than the pK_a of the conjugate acid of the base.

Which combination of reagents is effective in generating sodium ethoxide,CH₃CH₂ONa?

For the following acid-base reaction,which statement is true taking $\Delta$ H into consideration? $For the following acid-base reaction,which statement is true taking \Delta H into consideration?$