Question 1

Which of the following is the [H3O+] in pure water at room temperature?

Accepted Answer

A)  1.0 × 10-14 M 
B)  1.0 × 10-7 M 
C)  1.0 × 107 M 
D)  1.0 × 1014 M 
A)  1.0 × 10-14 M 
B)  1.0 × 10-7 M 
C)  1.0 × 107 M 
D)  1.0 × 1014 M

Question 2

When comparing two acids which of the following is true?

Accepted Answer

A)  the stronger acid has the larger Ka 
B)  the stronger acid has the smaller pKa 
C)  both a and b 
D)  neither a nor b 
A)  the stronger acid has the larger Ka 
B)  the stronger acid has the smaller pKa 
C)  both a and b 
D)  neither a nor b

Question 3

Which of the following is the [OH-] in pure water at room at room temperature?

Accepted Answer

A)  1.0 × 10-14 M 
B)  1.0 × 10-7 M 
C)  1.0 × 107 M 
D)  1.0 × 1014 M 
A)  1.0 × 10-14 M 
B)  1.0 × 10-7 M 
C)  1.0 × 107 M 
D)  1.0 × 1014 M

Question 4

Which of the following statements best describes the acid/base relationship?

Accepted Answer

A)  As acid strengths decrease conjugate base strengths increase. 
B)  As base strengths decrease conjugate acid strengths decrease. 
C)  both a and b 
D)  neither a and b 
A)  As acid strengths decrease conjugate base strengths increase. 
B)  As base strengths decrease conjugate acid strengths decrease. 
C)  both a and b 
D)  neither a and b

Question 5

The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 2.0 M and the sodium lactate concentration is 0.50 M?

Accepted Answer

A)  2.86 
B)  3.26 
C)  4.46 
D)  4.86 
A)  2.86 
B)  3.26 
C)  4.46 
D)  4.86

Question 6

Which piece of glassware do we generally use to deliver a predetermined fixed volume of solution in a titration?

Accepted Answer

A)  an Erlenmeyer flask 
B)  a graduated cylinder 
C)  a volumetric pipet 
D)  none of the above 
A)  an Erlenmeyer flask 
B)  a graduated cylinder 
C)  a volumetric pipet 
D)  none of the above

Question 7

Which of the following solutions can function as a buffer?

Accepted Answer

A)  a solution containing HC2H3O2 and NaC2H3O2 
B)  a solution containing H2CO3 and NaHCO3 
C)  a solution containing NH3 and NH4Cl 
D)  all of the above 
A)  a solution containing HC2H3O2 and NaC2H3O2 
B)  a solution containing H2CO3 and NaHCO3 
C)  a solution containing NH3 and NH4Cl 
D)  all of the above

Question 8

Which of the following can be the product of a neutralization reaction?

Accepted Answer

A)  NaCl(aq) 
B)  MgCl2(aq) 
C)  Na2SO4(aq) 
D)  any of these 
A)  NaCl(aq) 
B)  MgCl2(aq) 
C)  Na2SO4(aq) 
D)  any of these

Question 9

Which of the following is the correct expression for Keq 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 10

Which of the following species is not amphiprotic?

Accepted Answer

A)  C2H3O2- 
B)  HC3H2O4- 
C)  HC4H4O4- 
D)  None, all of them are amphiprotic. 
A)  C2H3O2- 
B)  HC3H2O4- 
C)  HC4H4O4- 
D)  None, all of them are amphiprotic.

Question 11

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

Accepted Answer

A)  HF 
B)  HCl 
C)  both a and b 
D)  neither a nor b 
A)  HF 
B)  HCl 
C)  both a and b 
D)  neither a nor b

Question 12

Which of the following is the correct relationship between pH and pOH?

Accepted Answer

A)  (pH) × (pOH) = 14 
B)  pH/pOH = 14 
C)  pH + pOH = 14 
D)  pH - pOH = 14 
A)  (pH) × (pOH) = 14 
B)  pH/pOH = 14 
C)  pH + pOH = 14 
D)  pH - pOH = 14

Question 13

In an aqueous solution the [H3O+] is 1.0 x 10 -6 M. What is the [OH-]?

Accepted Answer

A)  1.0 × 10-9 M 
B)  1.0 × 10-8 M 
C)  1.0 × 10-6 M 
D)  1.0 × 108 M 
A)  1.0 × 10-9 M 
B)  1.0 × 10-8 M 
C)  1.0 × 10-6 M 
D)  1.0 × 108 M

Question 14

How many protons can be lost by citric acid, H3C6H5O6?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  8 
A)  1 
B)  3 
C)  5 
D)  8

Question 15

Examine the activity series given below.  
-Examine the following image. Assume the solution in the beaker is a buffer solution.   If 0.01 mol of HCl was added to this solution, the resulting pH might be which of the following values?

Accepted Answer

A)  2.13 
B)  6.14 
C)  4.23 
D)  4.43 
A)  2.13 
B)  6.14 
C)  4.23 
D)  4.43

Question 16

Sulfites, salts of the anion, SO32- are found in wines as preservatives. The acid associated with the sulfite ion is H2SO3. What is the name of H2SO3?

Accepted Answer

A)  hydrosulfuric acid 
B)  hydrosulfuous acid 
C)  sulfuric acid 
D)  sulfurous acid 
A)  hydrosulfuric acid 
B)  hydrosulfuous acid 
C)  sulfuric acid 
D)  sulfurous acid

Question 17

In an acid-base equilibrium the equilibrium lies in the direction which favors which species?

Accepted Answer

A)  the stronger acid 
B)  the weaker base 
C)  both a and b 
D)  neither a nor b 
A)  the stronger acid 
B)  the weaker base 
C)  both a and b 
D)  neither a nor b

Question 18

The Ka for lactic acid is 8.4 × 10-4. What is the pKa of lactic acid?

Accepted Answer

A)  -10.92 
B)  -3.08 
C)  3.08 
D)  10.92 
A)  -10.92 
B)  -3.08 
C)  3.08 
D)  10.92

Question 19

Which of the following solutions can function as a buffer?

Accepted Answer

A)  a solution containing HCl and NaCl 
B)  a solution containing NaOH and NaCl 
C)  a solution containing HC2H3O2 and NaC2H3O2 
D)  all of the above 
A)  a solution containing HCl and NaCl 
B)  a solution containing NaOH and NaCl 
C)  a solution containing HC2H3O2 and NaC2H3O2 
D)  all of the above

Question 20

Increasing which of the following will increase the pH of a buffer made using acetic acid and sodium acetate?

Accepted Answer

A)  the amount of water present 
B)  the [C2H3O2-] 
C)  the [HC2H3O2] 
D)  both the [C2H3O2-] and [HC2H3O2] 
A)  the amount of water present 
B)  the [C2H3O2-] 
C)  the [HC2H3O2] 
D)  both the [C2H3O2-] and [HC2H3O2]

Exam 8: Acids and Bases

Which of the following is the [H3O+] in pure water at room temperature?

When comparing two acids which of the following is true?

Which of the following is the [OH-] in pure water at room at room temperature?

Which of the following statements best describes the acid/base relationship?

The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 2.0 M and the sodium lactate concentration is 0.50 M?

Which piece of glassware do we generally use to deliver a predetermined fixed volume of solution in a titration?

Which of the following solutions can function as a buffer?

Which of the following can be the product of a neutralization reaction?

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

Which of the following species is not amphiprotic?

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

Which of the following is the correct relationship between pH and pOH?

In an aqueous solution the [H3O+] is 1.0 x 10 -6 M. What is the [OH-]?

How many protons can be lost by citric acid, H3C6H5O6?

Examine the activity series given below. -Examine the following image. Assume the solution in the beaker is a buffer solution. If 0.01 mol of HCl was added to this solution, the resulting pH might be which of the following values?

Sulfites, salts of the anion, SO32- are found in wines as preservatives. The acid associated with the sulfite ion is H2SO3. What is the name of H2SO3?

In an acid-base equilibrium the equilibrium lies in the direction which favors which species?

The Ka for lactic acid is 8.4 × 10-4. What is the pKa of lactic acid?

Which of the following solutions can function as a buffer?

Increasing which of the following will increase the pH of a buffer made using acetic acid and sodium acetate?

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Which of the following is the [H₃O⁺] in pure water at room temperature?

Which of the following is the [OH^-] in pure water at room at room temperature?

The pK_a of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 2.0 M and the sodium lactate concentration is 0.50 M?

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

In an aqueous solution the [H₃O⁺] is 1.0 x 10 ^-6 M. What is the [OH-]?

How many protons can be lost by citric acid, H₃C₆H₅O₆?

Sulfites, salts of the anion, SO₃^2- are found in wines as preservatives. The acid associated with the sulfite ion is H₂SO₃. What is the name of H₂SO₃?

The K_a for lactic acid is 8.4 × 10^-4. What is the pK_a of lactic acid?