Question 1

A solution has a pOH of 7.4 What is its pH?

Accepted Answer

A)  -6.6 
B)  -7.4 
C)  7.4 
D)  6.6 
A)  -6.6 
B)  -7.4 
C)  7.4 
D)  6.6

Question 2

What is the name of the acid which dissociates to give the nitrate ion, NO3-?

Accepted Answer

A)  hydronitric acid 
B)  nitric acid 
C)  nitritic acid 
D)  nitrous acid 
A)  hydronitric acid 
B)  nitric acid 
C)  nitritic acid 
D)  nitrous acid

Question 3

Which of the following can be characterized as a strong base?

Accepted Answer

A)  Ba(OH)2 
B)  NH3 
C)  both a and b 
D)  neither a nor b 
A)  Ba(OH)2 
B)  NH3 
C)  both a and b 
D)  neither a nor b

Question 4

Which of the following can be characterized as a strong base?

Accepted Answer

A)  LiOH 
B)  KOH 
C)  both a and b 
D)  neither a nor b 
A)  LiOH 
B)  KOH 
C)  both a and b 
D)  neither a nor b

Question 5

Which of the following materials will react with an acid to produce a gas?

Accepted Answer

A)  NaOH(aq) 
B)  Na2CO3(aq) 
C)  both a and b 
D)  neither a nor b 
A)  NaOH(aq) 
B)  Na2CO3(aq) 
C)  both a and b 
D)  neither a nor b

Question 6

Which of the following can be characterized as a strong acid?

Accepted Answer

A)  HNO3 
B)  H2SO4 
C)  both a and b 
D)  neither a nor b 
A)  HNO3 
B)  H2SO4 
C)  both a and b 
D)  neither a nor b

Question 7

Which of the following buffers will have the best buffer capacity?

Accepted Answer

A)  a solution containing 0.1 M HC2H3O2 and 0.1 M NaC2H3O2 
B)  a solution containing 0.05 M HC2H3O2 and 0.15 M NaC2H3O2 
C)  a solution containing 0.15 M HC2H3O2 and 0.05 M NaC2H3O2 
D)  They all have the same buffer capacity. 
A)  a solution containing 0.1 M HC2H3O2 and 0.1 M NaC2H3O2 
B)  a solution containing 0.05 M HC2H3O2 and 0.15 M NaC2H3O2 
C)  a solution containing 0.15 M HC2H3O2 and 0.05 M NaC2H3O2 
D)  They all have the same buffer capacity.

Question 8

Which of the following is the correct expression for Kw of water?

Accepted Answer

A)  [H3O+][OH-]/[H2O] 
B)  [H2O]/[ H3O+][OH-] 
C)  [H3O+][OH-]/[H2O]2 
D)  [H3O+][OH-] 
A)  [H3O+][OH-]/[H2O] 
B)  [H2O]/[ H3O+][OH-] 
C)  [H3O+][OH-]/[H2O]2 
D)  [H3O+][OH-]

Question 9

In a particular titration experiment a 25.0 mL sample of an unknown monoprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. Which of the following can be determined from the information given here?

Accepted Answer

A)  the identity of the acid sample 
B)  the pH of the acid sample 
C)  the strength of the acid sample 
D)  none of the above 
A)  the identity of the acid sample 
B)  the pH of the acid sample 
C)  the strength of the acid sample 
D)  none of the above

Question 10

Human blood contains which of the following buffers?

Accepted Answer

A)  H2CO3/HCO3- 
B)  H2PO4-/HPO42- 
C)  both a and b 
D)  neither a nor b 
A)  H2CO3/HCO3- 
B)  H2PO4-/HPO42- 
C)  both a and b 
D)  neither a nor b

Question 11

As student doing a titration of HNO3 with sodium hydroxide wanted to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

Accepted Answer

A)  The concentration of HNO3 will be reported as too high. 
B)  The concentration of HNO3 will be reported as too low. 
C)  The concentration of HNO3 will be reported correctly. 
D)  The experiment cannot be done at all. 
A)  The concentration of HNO3 will be reported as too high. 
B)  The concentration of HNO3 will be reported as too low. 
C)  The concentration of HNO3 will be reported correctly. 
D)  The experiment cannot be done at all.

Question 12

Which of the following body fluids is always basic?

Accepted Answer

A)  pancreatic fluid 
B)  saliva 
C)  urine 
D)  all of them 
A)  pancreatic fluid 
B)  saliva 
C)  urine 
D)  all of them

Question 13

Which of the following pH's corresponds to a slightly basic solution?

Accepted Answer

A)  2.8 
B)  6.8 
C)  7.2 
D)  11.2 
A)  2.8 
B)  6.8 
C)  7.2 
D)  11.2

Question 14

Lime, CaO, is insoluble in water. In which of the following materials will it dissolve?

Accepted Answer

A)  HCl(aq) 
B)  NaOH(aq) 
C)  Ca(OH)2(aq) 
D)  none of these 
A)  HCl(aq) 
B)  NaOH(aq) 
C)  Ca(OH)2(aq) 
D)  none of these

Question 15

The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.20 M and the sodium lactate concentration is 2.0 M?

Accepted Answer

A)  2.86 
B)  3.86 
C)  4.86 
D)  7.00 
A)  2.86 
B)  3.86 
C)  4.86 
D)  7.00

Question 16

Which of the following is formed when a strong acid reacts with methylamine, CH3NH2?

Accepted Answer

A)  CH3NH3 
B)  CH3NH3+ 
C)  (CH3)2NH2+ 
D)  None of these, no reaction occurs. 
A)  CH3NH3 
B)  CH3NH3+ 
C)  (CH3)2NH2+ 
D)  None of these, no reaction occurs.

Question 17

The pKa of formic acid is 3.75. What is the Ka of formic acid?

Accepted Answer

A)  1.8 × 10-18 
B)  5.6 × 10-11 
C)  1.8 × 10-4 
D)  5.6 × 103 
A)  1.8 × 10-18 
B)  5.6 × 10-11 
C)  1.8 × 10-4 
D)  5.6 × 103

Question 18

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

Accepted Answer

A)  The buffer capacity depends on the concentration of the acid and base 
B)  The pH depends on the concentration of the buffer 
C)  both a and b 
D)  neither a nor b 
A)  The buffer capacity depends on the concentration of the acid and base 
B)  The pH depends on the concentration of the buffer 
C)  both a and b 
D)  neither a nor b

Question 19

In a particular titration experiment a 30.0 mL sample of an unknown monoprotic acid required 25.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?

Accepted Answer

A)  0.120 M 
B)  0.167 M 
C)  0.240 M 
D)  0.333 M 
A)  0.120 M 
B)  0.167 M 
C)  0.240 M 
D)  0.333 M

Question 20

Which of the following bases has the strongest conjugate acid?

Accepted Answer

A)  CH3COO- 
B)  C6H5O- 
C)  HSO4- 
D)  H2PO4- 
A)  CH3COO- 
B)  C6H5O- 
C)  HSO4- 
D)  H2PO4-

Exam 8: Acids and Bases

A solution has a pOH of 7.4 What is its pH?

What is the name of the acid which dissociates to give the nitrate ion, NO3-?

Which of the following can be characterized as a strong base?

Which of the following can be characterized as a strong base?

Which of the following materials will react with an acid to produce a gas?

Which of the following can be characterized as a strong acid?

Which of the following buffers will have the best buffer capacity?

Which of the following is the correct expression for Kw of water?

In a particular titration experiment a 25.0 mL sample of an unknown monoprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. Which of the following can be determined from the information given here?

Human blood contains which of the following buffers?

As student doing a titration of HNO3 with sodium hydroxide wanted to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

Which of the following body fluids is always basic?

Which of the following pH's corresponds to a slightly basic solution?

Lime, CaO, is insoluble in water. In which of the following materials will it dissolve?

The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.20 M and the sodium lactate concentration is 2.0 M?

Which of the following is formed when a strong acid reacts with methylamine, CH3NH2?

The pKa of formic acid is 3.75. What is the Ka of formic acid?

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

In a particular titration experiment a 30.0 mL sample of an unknown monoprotic acid required 25.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?

Which of the following bases has the strongest conjugate acid?

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What is the name of the acid which dissociates to give the nitrate ion, NO₃^-?

Which of the following is the correct expression for K_w of water?

As student doing a titration of HNO₃ with sodium hydroxide wanted to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

The pK_a of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.20 M and the sodium lactate concentration is 2.0 M?

Which of the following is formed when a strong acid reacts with methylamine, CH₃NH₂?

The pK_a of formic acid is 3.75. What is the K_a of formic acid?