Question 1

Which of the following is the strongest conjugate acid?

Accepted Answer

A)  HF 
B)    
C)  HOCl 
D)  HCN 
E)  all the same 
A)  HF 
B)    
C)  HOCl 
D)  HCN 
E)  all the same

Question 2

Which has the higher [H+], 0.40 M RbOH or 0.20 M Ca(OH)2?

Accepted Answer

A)  Neither, the [H+]'s are equal. 
B)  0.40 M RbOH 
C)  0.20 M Ca(OH)2 
D)  Neither, these are bases so there is no [H+]. 
E)  The answer depends on the volumes of the respective solutions. 
A)  Neither, the [H+]'s are equal. 
B)  0.40 M RbOH 
C)  0.20 M Ca(OH)2 
D)  Neither, these are bases so there is no [H+]. 
E)  The answer depends on the volumes of the respective solutions.

Question 3

Choose the pair of concentrations that cannot be in a given aqueous solution at 25°C.

Accepted Answer

A)  [H+] = 10-3 M, [OH-] = 10-11 M 
B)  [H+] = 10-7 M, [OH-] = 10-7 M 
C)  [H+] = 10-13 M, [OH-] = 1 M 
D)  [H+] = 10 M, [OH-] = 10-15 M 
E)  All of these can exist. 
A)  [H+] = 10-3 M, [OH-] = 10-11 M 
B)  [H+] = 10-7 M, [OH-] = 10-7 M 
C)  [H+] = 10-13 M, [OH-] = 1 M 
D)  [H+] = 10 M, [OH-] = 10-15 M 
E)  All of these can exist.

Question 4

Which of the following is not a conjugate acid-base pair?

Accepted Answer

A)  H2SO4, SO42- 
B)  HNO3, NO3- 
C)  HC2H3O2, C2H3O2- 
D)  H2PO4-, HPO42- 
E)  HBr, Br- 
A)  H2SO4, SO42- 
B)  HNO3, NO3- 
C)  HC2H3O2, C2H3O2- 
D)  H2PO4-, HPO42- 
E)  HBr, Br-

Question 5

Which of the following is the strongest conjugate base?

Accepted Answer

A)  F- 
B)  NH3 
C)  OCl- 
D)  CN- 
E)  all the same 
A)  F- 
B)  NH3 
C)  OCl- 
D)  CN- 
E)  all the same

Question 6

Calculate the pH of   M HCl.

Accepted Answer

A)  4.41 
B)  9.59 
C)  13.75 
D)  6.90 
E)  none of these 
A)  4.41 
B)  9.59 
C)  13.75 
D)  6.90 
E)  none of these

Question 7

A weak acid, HOCl, is in solution with dissolved sodium hypochlorite, NaOCl. If HCl is added which ion will react with the extra hydrogen ions from the HCl to keep the pH from changing?

Accepted Answer

A)  OCl- 
B)  Na+ 
C)  HOCl- 
D)  OH- 
E)  none of these 
A)  OCl- 
B)  Na+ 
C)  HOCl- 
D)  OH- 
E)  none of these

Question 8

A solution is buffered by the presence of a weak acid and its conjugate base.

Accepted Answer

A) True 
 B)False

Question 9

A solution has [H+] = 4.0 *10-3 M. The [OH-] in this solution is

Accepted Answer

A)    M 
B)    M 
C)    M 
D)    M 
E)  none of these 
A)    M 
B)    M 
C)    M 
D)    M 
E)  none of these

Which of the following is the strongest conjugate acid?

Which has the higher [H⁺], 0.40 M RbOH or 0.20 M Ca(OH)₂?

Choose the pair of concentrations that cannot be in a given aqueous solution at 25°C.

Which of the following is not a conjugate acid-base pair?

Which of the following is the strongest conjugate base?

Calculate the pH of M HCl.

A weak acid, HOCl, is in solution with dissolved sodium hypochlorite, NaOCl. If HCl is added which ion will react with the extra hydrogen ions from the HCl to keep the pH from changing?

A solution is buffered by the presence of a weak acid and its conjugate base.

A solution has [H⁺] = 4.0 *10^-³ M. The [OH^-] in this solution is

Chemistry: an Introduction

Measurements and Calculations

Matter

Chemical Foundations: Elements, Atoms, and Ions

Nomenclature

Chemical Reactions: an Introduction

Reactions in Aqueous Solutions

Chemical Composition

Chemical Quantities

Energy

Modern Atomic Theory

Chemical Bonding

Gases

Liquids and Solids

Solutions

Equilibrium

Oxidation-Reduction Reactions and Electrochemistry

Radioactivity and Nuclear Energy

Organic Chemistry

Biochemistry

Filters

Exam 16: Acids and Bases

Which of the following is the strongest conjugate acid?

Which has the higher [H+], 0.40 M RbOH or 0.20 M Ca(OH)2?

Choose the pair of concentrations that cannot be in a given aqueous solution at 25°C.

Which of the following is not a conjugate acid-base pair?

Which of the following is the strongest conjugate base?

Calculate the pH of M HCl.

A weak acid, HOCl, is in solution with dissolved sodium hypochlorite, NaOCl. If HCl is added which ion will react with the extra hydrogen ions from the HCl to keep the pH from changing?

A solution is buffered by the presence of a weak acid and its conjugate base.

A solution has [H+] = 4.0 *10-3 M. The [OH-] in this solution is

Chemistry: an Introduction

Measurements and Calculations

Matter

Chemical Foundations: Elements, Atoms, and Ions

Nomenclature

Chemical Reactions: an Introduction

Reactions in Aqueous Solutions

Chemical Composition

Chemical Quantities

Energy

Modern Atomic Theory

Chemical Bonding

Gases

Liquids and Solids

Solutions

Equilibrium

Oxidation-Reduction Reactions and Electrochemistry

Radioactivity and Nuclear Energy

Organic Chemistry

Biochemistry

Filters

Which has the higher [H⁺], 0.40 M RbOH or 0.20 M Ca(OH)₂?

A solution has [H⁺] = 4.0 *10^-³ M. The [OH^-] in this solution is