Question 1

Which of the following is an example of a diprotic acid?

Accepted Answer

A)  NH2−
B)  H2SO4
C)  HCl
D)  CH4
E)  NH2− and H2SO4 are correct.

Question 2

Butyric acid is a weak acid.Which reaction equation properly represents the dissociation of butyric acid in water?

Accepted Answer

A)  CH3CH2CH2COOH(aq) + H2O(l) ? CH3CH2CH2COO- (aq) + H3O+(aq) 
B)  CH3CH2CH2COOH(aq) + H2O(l)  ?  CH3CH2CH2COO-(aq) + H3O+(aq) 
C)  CH3CH2CH2COOH(aq) + H2O(l) ? CH3CH2CH2COOH2+(aq) + OH-(aq) 
D)  CH3CH2CH2COOH(aq) + H2O(l)  ?  CH2CH2CH2COOH(aq) + H3O+(aq) 
E)  CH3CH2CH2COOH(aq) + H2O(l) ? CH3CH2CH2COO- (aq) + H3O+(aq) and CH3CH2CH2COOH(aq) + H2O(l)  ?  CH3CH2CH2COO-(aq) + H3O+(aq) are correct.

Question 3

The ion-product of water is affected by a change in temperature.

Accepted Answer

A) True 
 B)False

Question 4

A buffer solution contains carbonic acid (H2CO3) and sodium bicarbonate (NaHCO3) ,each at a concentration of 0.100 M.The relevant equilibrium is shown below.What is the pH of this buffer solution? H2CO3(aq) + H2O(l)  ?  H3O+(aq) + HCO3?(aq)  Ka = 4.5 × 10?7

Accepted Answer

A)  4.50
B)  7.00
C)  6.35
D)  7.65
E)  2.16

Question 5

Which statement correctly describes conjugate acids and bases according to the Brønsted-Lowry theory?

Accepted Answer

A)  A conjugate base is the species formed when an acid donates a proton; a conjugate acid is the species formed when a base accepts a proton.
B)  A conjugate base is the species formed when an acid accepts a proton; a conjugate acid is the species formed when a base donates a proton.
C)  A conjugate acid is the species formed when an acid donates a proton; a conjugate base is the species formed when a base accepts a proton.
D)  A conjugate acid is an acid that does not completely transfer a proton to water; a conjugate base is a base that does not completely accept a proton from water.
E)  A conjugate acid is the solution formed when an acid is added to water; a conjugate base is the solution formed when a base is added to water.

Question 6

What is the conjugate acid of NH2−?

Accepted Answer

A)  NH2−
B)  NH3
C)  NH4+
D)  NH2+
E)  NH4−

Question 7

The species that remains after an acid donates a proton is called its conjugate base.What is the conjugate base of the hydronium ion,H3O+?

Accepted Answer

A)  OH-
B)  H2O-
C)  H2O
D)  H2O+
E)  H3O+ has no conjugate base.

Question 8

What is the pH of a 1.0 × 10−4 M solution of KOH?

Accepted Answer

A)  4.00
B)  6.00
C)  7.00
D)  10.00
E)  14.00

Question 9

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H3O+] = 1.1 × 10−10 M,what is the pH of this solution?

Accepted Answer

A)  1.00
B)  3.69
C)  8.96
D)  9.96
E)  11

Question 10

All metal hydroxides are strong bases.

Accepted Answer

A) True 
 B)False

Question 11

A pH of 0 is considered neutral.

Accepted Answer

A) True 
 B)False

Question 12

In electrolysis,electrical energy is used to drive a non-spontaneous oxidation-reduction reaction to occur.

Accepted Answer

A) True 
 B)False

Question 13

What is the pH of a solution that has [H3O+] = 6.0 × 10−3 M?

Accepted Answer

A)  1.7 × 10−12
B)  2.22
C)  3.60
D)  5.12
E)  11.78

Question 14

A solution containing a buffer has an initial pH of 8.78.If a student adds 5 drops of HCl(aq) to this solution,what would be a reasonable pH for the resulting solution?

Accepted Answer

A)  5.22
B)  7.00
C)  8.64
D)  8.78
E)  8.89

Question 15

What is the pH of a 0.035 M HCl solution?

Accepted Answer

A)  3.50
B)  1.46
C)  2.27
D)  5.59
E)  12.54

Question 16

During an oxidation-reduction reaction,the oxidizing agent loses electrons.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following compounds is NOT considered a polyprotic acid?

Accepted Answer

A)  H2SO4
B)  H3PO4
C)  H2CO3
D)  H2SO3
E)  CH3COOH

Question 18

A particular buffer solution consists of a weak acid and its conjugate base.How could this buffer solution be modified so as to increase its buffer capacity against added base?

Accepted Answer

A)  Increase the concentration of the weak acid.
B)  Increase the concentration of its conjugate base.
C)  Use a strong base and its conjugate acid instead.
D)  Use a strong acid and its conjugate base instead.
E)  Make the concentrations of the weak acid and its conjugate base equal.

Question 19

For the reaction shown below,which of the following correctly represents a conjugate acid-base pair? HCO2H(aq) + H2O(l)  ?  H3O+(aq) + HCO2?(aq)

Accepted Answer

A)  HCO2H/H3O+
B)  HCO2H/H2O
C)  H2O/HCO2-
D)  H3O+/HCO2-
E)  HCO2H/HCO2?

Question 20

All Brønsted-Lowry bases contain hydroxide.

Accepted Answer

A) True 
 B)False

Exam 8: Acids and Bases

A buffer solution contains carbonic acid (H2CO3) and sodium bicarbonate (NaHCO3) ,each at a concentration of 0.100 M.The relevant equilibrium is shown below.What is the pH of this buffer solution? H2CO3(aq) + H2O(l) ? H3O+(aq) + HCO3?(aq) Ka = 4.5 × 10?7

Correct AnswerverifiedShow Answer

For the reaction shown below,which of the following correctly represents a conjugate acid-base pair? HCO2H(aq) + H2O(l) ? H3O+(aq) + HCO2?(aq)

Correct AnswerverifiedShow Answer

Which of the following is an example of a diprotic acid?

Correct AnswerverifiedShow Answer

The species that remains after an acid donates a proton is called its conjugate base.What is the conjugate base of the hydronium ion,H3O+?

Correct AnswerverifiedShow Answer

What is the pH of a 0.035 M HCl solution?

Correct AnswerverifiedShow Answer

All Brønsted-Lowry bases contain hydroxide.

Correct AnswerverifiedShow Answer

A solution containing a buffer has an initial pH of 8.78.If a student adds 5 drops of HCl(aq) to this solution,what would be a reasonable pH for the resulting solution?

Correct AnswerverifiedShow Answer

The ion-product of water is affected by a change in temperature.

Correct AnswerverifiedShow Answer

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H3O+] = 1.1 × 10−10 M,what is the pH of this solution?

Correct AnswerverifiedShow Answer

During an oxidation-reduction reaction,the oxidizing agent loses electrons.

Correct AnswerverifiedShow Answer

What is the conjugate acid of NH2−?

Correct AnswerverifiedShow Answer

A pH of 0 is considered neutral.

Correct AnswerverifiedShow Answer

Butyric acid is a weak acid.Which reaction equation properly represents the dissociation of butyric acid in water?

Correct AnswerverifiedShow Answer

In electrolysis,electrical energy is used to drive a non-spontaneous oxidation-reduction reaction to occur.

Correct AnswerverifiedShow Answer

All metal hydroxides are strong bases.

Correct AnswerverifiedShow Answer

What is the pH of a solution that has [H3O+] = 6.0 × 10−3 M?

Correct AnswerverifiedShow Answer

Which of the following compounds is NOT considered a polyprotic acid?

Correct AnswerverifiedShow Answer

What is the pH of a 1.0 × 10−4 M solution of KOH?

Correct AnswerverifiedShow Answer

A particular buffer solution consists of a weak acid and its conjugate base.How could this buffer solution be modified so as to increase its buffer capacity against added base?

Correct AnswerverifiedShow Answer

Which statement correctly describes conjugate acids and bases according to the Brønsted-Lowry theory?

Correct AnswerverifiedShow Answer

A buffer solution contains carbonic acid (H₂CO₃) and sodium bicarbonate (NaHCO₃) ,each at a concentration of 0.100 M.The relevant equilibrium is shown below.What is the pH of this buffer solution? H₂CO₃(aq) + H₂O(l) ? H₃O⁺(aq) + HCO₃^?(aq) K_a = 4.5 × 10^?7

Correct Answer
verified

For the reaction shown below,which of the following correctly represents a conjugate acid-base pair? HCO₂H(aq) + H₂O(l) ? H₃O⁺(aq) + HCO₂^?(aq)

Correct Answer
verified

Correct Answer
verified

The species that remains after an acid donates a proton is called its conjugate base.What is the conjugate base of the hydronium ion,H₃O⁺?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H₃O⁺] = 1.1 × 10⁻¹⁰ M,what is the pH of this solution?

Correct Answer
verified

Correct Answer
verified

What is the conjugate acid of NH₂⁻_?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the pH of a solution that has [H₃O⁺] = 6.0 × 10⁻³ M?

Correct Answer
verified

Correct Answer
verified

What is the pH of a 1.0 × 10⁻⁴ M solution of KOH?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified