Question 1

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 H2SO4 and NaHSO4 
D)  none of the above 
A)  a solution containing HCl and NaCl 
B)  a solution containing NaOH and NaCl 
C)  a solution containing H2SO4 and NaHSO4 
D)  none of the above

Question 2

The pKa of hydrocyanic acid is 9.31. What is the Ka of hydrocyanic acid?

Accepted Answer

A)  1.3 × 10-24 
B)  1.3 × 10-10 
C)  4.9 × 10-10 
D)  2.0 × 109 
A)  1.3 × 10-24 
B)  1.3 × 10-10 
C)  4.9 × 10-10 
D)  2.0 × 109

Question 3

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

Accepted Answer

A)  0.001 M HCl 
B)  3.0 M HCl 
C)  both a and b 
D)  neither a nor b 
A)  0.001 M HCl 
B)  3.0 M HCl 
C)  both a and b 
D)  neither a nor b

Question 4

The species H+ can be called which of the following?

Accepted Answer

A)  hydrogen ion 
B)  proton 
C)  either a or b 
D)  neither a nor b 
A)  hydrogen ion 
B)  proton 
C)  either a or b 
D)  neither a nor b

Question 5

Which of the following is the Brønsted-Lowry definition of a base?

Accepted Answer

A)  a hydroxide ion acceptor 
B)  a proton acceptor 
C)  a proton donor 
D)  none of these 
A)  a hydroxide ion acceptor 
B)  a proton acceptor 
C)  a proton donor 
D)  none of these

Question 6

Which of the following is a cause of alkalosis?

Accepted Answer

A)  a poor diet 
B)  hyperventilation 
C)  hypoventilation 
D)  intense exercise 
A)  a poor diet 
B)  hyperventilation 
C)  hypoventilation 
D)  intense exercise

Question 7

Which of the following is the definition of pH?

Accepted Answer

A)  1 × 10pH 
B)  log[H3O+] 
C)  -log[H3O+] 
D)  none of these 
A)  1 × 10pH 
B)  log[H3O+] 
C)  -log[H3O+] 
D)  none of these

Question 8

Which of the following is the conjugate acid of ammonia, NH3?

Accepted Answer

A)  H+ 
B)  H3O+ 
C)  NH2- 
D)  NH4+ 
A)  H+ 
B)  H3O+ 
C)  NH2- 
D)  NH4+

Question 9

When solid sodium hydroxide is dissolved in water which of the following species is not present in the solution?

Accepted Answer

A)  H2O(l) 
B)  Na+(aq) 
C)  OH-(aq) 
D)  None, they are all present. 
A)  H2O(l) 
B)  Na+(aq) 
C)  OH-(aq) 
D)  None, they are all present.

Question 10

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

Accepted Answer

A)  0.001 M HCl 
B)  3.0 M CH3COOH 
C)  both a and b 
D)  neither a nor b 
A)  0.001 M HCl 
B)  3.0 M CH3COOH 
C)  both a and b 
D)  neither a nor b

Question 11

In a particular titration experiment a 25.0 mL sample of an unknown diprotic acid required 30.0 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 12

When comparing the strength of two weak acids which factor(s) do we use to determine which is the stronger of the two?

Accepted Answer

A)  the size of the acid dissociation constants 
B)  the values of the pKa's of the acids 
C)  either a or b 
D)  neither a nor b 
A)  the size of the acid dissociation constants 
B)  the values of the pKa's of the acids 
C)  either a or b 
D)  neither a nor b

Question 13

When an acid reacts with a base the reaction is called which of the following?

Accepted Answer

A)  neutralization 
B)  precipitation 
C)  redox 
D)  single displacement 
A)  neutralization 
B)  precipitation 
C)  redox 
D)  single displacement

Question 14

An acetic acid solution has a pH of 5.80, what is the [H3O+] in this solution?

Accepted Answer

A)  1.6 × 10-20 M 
B)  6.3 × 10-9 M 
C)  1.6 × 10-6 M 
D)  6.3 × 105 M 
A)  1.6 × 10-20 M 
B)  6.3 × 10-9 M 
C)  1.6 × 10-6 M 
D)  6.3 × 105 M

Question 15

Acetic acid, CH3COOH, is a stronger acid than the ammonium ion, NH4+. When acetic acid reacts with ammonia, NH3, what species are present in the solution in the largest amount?

Accepted Answer

A)  acetic acid, CH3COOH and ammonia, NH3 
B)  acetic acid, CH3COOH, and ammonium, NH4+ 
C)  acetate ion, CH3COO-, and ammonia, NH3 
D)  acetate ion, CH3COO-, and ammonium ion, NH4+ 
A)  acetic acid, CH3COOH and ammonia, NH3 
B)  acetic acid, CH3COOH, and ammonium, NH4+ 
C)  acetate ion, CH3COO-, and ammonia, NH3 
D)  acetate ion, CH3COO-, and ammonium ion, NH4+

Question 16

Metabolic acidosis is associated with increased production of which of the following?

Accepted Answer

A)  citric acid 
B)  formic acid 
C)  lactic acid 
D)  phosphoric acid 
A)  citric acid 
B)  formic acid 
C)  lactic acid 
D)  phosphoric acid

Question 17

Which of the following occurs when NaOH is dissolved in water to form a basic solution?

Accepted Answer

A)  A complex between NaOH and water is formed. 
B)  NaOH breaks up to form Na+(aq), H+(aq) and O2-(aq). 
C)  NaOH breaks up to form Na+(aq) and OH-(aq). 
D)  The water molecule loses an H+. 
A)  A complex between NaOH and water is formed. 
B)  NaOH breaks up to form Na+(aq), H+(aq) and O2-(aq). 
C)  NaOH breaks up to form Na+(aq) and OH-(aq). 
D)  The water molecule loses an H+.

Question 18

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

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 19

An ammonia solution has a pH of 8.30, what is the [OH-] in this solution?

Accepted Answer

A)  5.0 × 10-23 M 
B)  2.0 × 10- 6 M 
C)  5.0 × 10-9 M 
D)  2.0 × 108 M 
A)  5.0 × 10-23 M 
B)  2.0 × 10- 6 M 
C)  5.0 × 10-9 M 
D)  2.0 × 108 M

Question 20

Which of the following must we know when we carry out a titration?

Accepted Answer

A)  the concentrations of all reactants except one 
B)  the stoichiometric ratio of the reactants 
C)  the volumes all reactants 
D)  all of the above 
A)  the concentrations of all reactants except one 
B)  the stoichiometric ratio of the reactants 
C)  the volumes all reactants 
D)  all of the above

Exam 8: Acids and Bases

Which of the following solutions can function as a buffer?

The pKa of hydrocyanic acid is 9.31. What is the Ka of hydrocyanic acid?

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

The species H+ can be called which of the following?

Which of the following is the Brønsted-Lowry definition of a base?

Which of the following is a cause of alkalosis?

Which of the following is the definition of pH?

Which of the following is the conjugate acid of ammonia, NH3?

When solid sodium hydroxide is dissolved in water which of the following species is not present in the solution?

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

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

When comparing the strength of two weak acids which factor(s) do we use to determine which is the stronger of the two?

When an acid reacts with a base the reaction is called which of the following?

An acetic acid solution has a pH of 5.80, what is the [H3O+] in this solution?

Acetic acid, CH3COOH, is a stronger acid than the ammonium ion, NH4+. When acetic acid reacts with ammonia, NH3, what species are present in the solution in the largest amount?

Metabolic acidosis is associated with increased production of which of the following?

Which of the following occurs when NaOH is dissolved in water to form a basic solution?

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

An ammonia solution has a pH of 8.30, what is the [OH-] in this solution?

Which of the following must we know when we carry out a titration?

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Filters

The pK_a of hydrocyanic acid is 9.31. What is the K_a of hydrocyanic acid?

The species H⁺ can be called which of the following?

Which of the following is the conjugate acid of ammonia, NH₃?

An acetic acid solution has a pH of 5.80, what is the [H₃O⁺] in this solution?

Acetic acid, CH₃COOH, is a stronger acid than the ammonium ion, NH₄⁺. When acetic acid reacts with ammonia, NH₃, what species are present in the solution in the largest amount?

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

An ammonia solution has a pH of 8.30, what is the [OH^-] in this solution?