Question 1

What is the pH of a 0.010 M acetic acid solution? (Ka for acetic acid is 1.76  ×	imes×  10-5.)

Accepted Answer

A)  2.00
B)  4.74
C)  2.74
D)  3.38
E)  6.74 F) A) and B)
G) None of the above

Question 2

What is the pH of a 0.20 M ammonia solution? (The Kb value for ammonia is 1.8  ×	imes× 10-5.)

Accepted Answer

A)  11.28
B)  9.26
C)  4.74
D)  9.56
E)  2.72 F) B) and E)
G) C) and E)

Question 3

A 0.100 M monoprotic weak acid solution has a pH of 3.00.What is the pKa of this acid?

Accepted Answer

A)  5.00
B)  0.10
C)  3.00
D)  9.99
E)  6.00F) B) and C)
G) All of the above

Question 4

What is the percent dissociation of 0.20 M phenol? (The Ka value for phenol is 1.3  ×	imes× 10-10.)

Accepted Answer

A)  0.13%
B)  5.1  ×	imes×  10-6%
C)  2.6  ×	imes× 10-3%
D)  5.1  ×	imes×  10-4%
E)  0.26% F) A) and C)
G) C) and D)

Question 5

Ksp for mercury(II)iodide is 2.8 $\times$10-29 at 25°C.What is the molar solubility of HgI2,and what are the concentrations of Hg2+ and I-in a saturated solution?

Accepted Answer

s = 1.9

10^-10; [Hg...

Question 6

Which of the following would be the best choice for preparing a buffer with a pH = 8.0?

Accepted Answer

A)  a solution of formic acid and sodium formate,Ka = 1.8  ×	imes×  10-4
B)  a solution of acetic acid and sodium acetate,Ka = 1.8  ×	imes×  10-5
C)  a solution of hypochlorous acid and sodium hypochlorite,Ka = 3.5  ×	imes×  10-8
D)  a solution of boric acid and sodium borate,Ka = 5.8  ×	imes×  10-10
E)  All of these solutions would be equally good choices for making this buffer. F) B) and D)
G) All of the above

Question 7

In the following reaction in aqueous solution,the acid reactant is __________ and the base reactant is __________. OH-(aq) + C6H5NH3+(aq)  ⇆\leftrightarrows⇆   C6H5NH2(aq) + H2O( -(aq) + C6H5NH3+(aq)  \leftrightarrows   C6H5NH2(aq) + H2O(   )  A) H2O; OH- B) C6H5NH3+; C6H5NH2 C) H2O; C6H5NH2 D) C6H5NH3+; OH- E) H2O; C6H5NH3+ " class="answers-bank-image d-inline" rel="preload" > )

Accepted Answer

A)  H2O; OH-
B)  C6H5NH3+; C6H5NH2
C)  H2O; C6H5NH2
D)  C6H5NH3+; OH-
E)  H2O; C6H5NH3+ F) C) and E)
G) A) and E)

Question 8

Write the reaction and equilibrium constant that describes the autoionization of water.

Accepted Answer

2 H₂O

H₃...

Question 9

The Yucca Mountain repository in Nevada,which is intended for the long-term storage of nuclear waste,has long been mired in controversy.One ongoing concern is whether the stainless-steel alloy containers could be corroded by salts such as calcium fluoride.If the calcium ion concentration in water inside Yucca Mountain is 1.25  ×	imes×  10-3 M,what is the maximum possible concentration of fluoride ion in this water? Assume calcium fluoride Ksp = 2.2  ×	imes×  10-10 at the temperatures inside the nuclear waste depository.

Accepted Answer

A)  1.3  ×	imes×  10-3 M
B)  2.5  ×	imes×  10-3 M
C)  1.8  ×	imes×  10-7 M
D)  4.2  ×	imes×  10-4 M
E)  2.1  ×	imes× 10-4 M F) B) and E)
G) None of the above

Question 10

What would happen to the Ag+ and Cl- concentrations if NaCl(s) was added to a saturated solution of AgCl in water?

Accepted Answer

A)  [Ag+] and [Cl-] both would increase.
B)  [Ag+] and [Cl-] both would decrease.
C)  [Ag+] would become larger,and [Cl-] would become smaller.
D)  [Ag+] would become smaller,and [Cl-] would become larger.
E)  [Ag+] and [Cl-] would remain the same because the solution is saturated.F) A) and B)
G) D) and E)

Question 11

Which of the following compounds cannot be a Brønsted-Lowry base?

Accepted Answer

A)  OH-
B)  H2O
C)  NH3
D)  NH4+
E)  SH-F) B) and D)
G) A) and C)

Question 12

Which one of the following is NOT a strong acid?

Accepted Answer

A)  nitric acid,HNO3
B)  sulfuric acid,H2SO4
C)  carbonic acid,H2CO3
D)  hydrochloric acid,HCl
E)  perchloric acid,HClO4F) C) and D)
G) A) and D)

Question 13

Write the reaction showing the ionization of HCl and of HF in water.Indicate whether the extent of ionization is 100% or less than 100%.

Accepted Answer

HCl(aq)+ H₂O(

_TB6561_11 )

Cl<...

Question 14

Halfway to the equivalence point in a titration curve of a weak acid with a strong base,__________

Accepted Answer

A)  nothing is happening yet.
B)  pH = pKa of the weak acid.
C)  pH = 3.5 exactly.
D)  pH = pKa of the indicator.
E)  the pH has not yet changed.F) C) and E)
G) C) and D)

Question 15

A cup of coffee has a hydroxide ion concentration of 1  ×	imes× 10-10 M.What is the pH of this coffee?

Accepted Answer

A)  1.0  ×	imes×  10-4
B)  4.0
C)  10.0
D)  7.0
E)  -10.0 F) A) and E)
G) None of the above

Question 16

Sodium benzoate (NaC6H5COO) is a common food preservative.What is the pH of a 0.150 M NaC6H5COO solution? (The Ka value for benzoic acid is 6.46  ×	imes× 10-5.)

Accepted Answer

A)  2.507
B)  8.986
C)  11.493
D)  5.317
E)  8.683 F) All of the above
G) A) and B)

Question 17

To simulate the pH of blood,which is 7.4,a buffer solution made by dissolving sodium dihydrogen phosphate (Ka = 6.2  ×	imes× 10-8) and sodium hydrogen phosphate (Ka = 3.6  ×	imes× 10-13) together in an aqueous solution can be used.What mole ratio of Na2HPO4/NaH2PO4 is required to produce a solution with a pH of 7.4?

Accepted Answer

A)  1.2
B)  1.6
C)  0.90
D)  1.0
E)  0.96 F) A) and D)
G) C) and E)

Question 18

Briefly explain how the carbonic acid-bicarbonate buffer solution stabilizes the pH of blood.
CO2(aq)+ H2O(  )$\leftrightarrows$  H2CO3(aq)$\leftrightarrows$  H+(aq)+ HCO3-(aq)

Accepted Answer

When acid is added,the system ...

Question 19

In the following reaction in aqueous solution,the acid reactant is __________ and the base reactant is __________. HCOOH(aq) + H2O( 2O(   )  \leftrightarrows  HCOO-(aq) + H3O+(aq)  A) HCOOH; HCOO- B) H2O; HCOOH C) H2O; HCOO- D) H2O; H3O+ E) HCOOH; H2O " class="answers-bank-image d-inline" rel="preload" > )  ⇆\leftrightarrows⇆  HCOO-(aq) + H3O+(aq)

Accepted Answer

A)  HCOOH; HCOO-
B)  H2O; HCOOH
C)  H2O; HCOO-
D)  H2O; H3O+
E)  HCOOH; H2O F) B) and E)
G) C) and D)

Exam 15: Aqueous Equilibria-Chemistry of the Water World

Correct Answer
verified

Which of the following would be the best choice for preparing a buffer with a pH = 8.0?

Correct Answer
verified

Correct Answer
verified
When acid is added,the system ...
View Answer

Which of the following compounds cannot be a Brønsted-Lowry base?

Correct Answer
verified

What would happen to the Ag⁺ and Cl^- concentrations if NaCl(s) was added to a saturated solution of AgCl in water?

Correct Answer
verified

A 0.100 M monoprotic weak acid solution has a pH of 3.00.What is the pK_a of this acid?

Correct Answer
verified

What is the percent dissociation of 0.20 M phenol? (The K_a value for phenol is 1.3 $\times$ 10^-¹⁰.)

Correct Answer
verified

Halfway to the equivalence point in a titration curve of a weak acid with a strong base,__________

Correct Answer
verified

Which one of the following is NOT a strong acid?

Correct Answer
verified

Correct Answer
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Correct Answer
verified

K_sp for mercury(II)iodide is 2.8 $\times$ 10^-29 at 25°C.What is the molar solubility of HgI₂,and what are the concentrations of Hg²⁺ and I^-in a saturated solution?

Correct Answer
verified
s = 1.9 10^-10; [Hg...
View Answer

Write the reaction showing the ionization of HCl and of HF in water.Indicate whether the extent of ionization is 100% or less than 100%.

Correct Answer
verified
HCl(aq)+ H₂O( _TB6561_11 )Cl<...
View Answer

What is the pH of a 0.010 M acetic acid solution? (K_a for acetic acid is 1.76 $\times$ 10^-⁵.)

Correct Answer
verified

Write the reaction and equilibrium constant that describes the autoionization of water.

Correct Answer
verified
2 H₂O H₃...
View Answer

Correct Answer
verified

Sodium benzoate (NaC₆H₅COO) is a common food preservative.What is the pH of a 0.150 M NaC₆H₅COO solution? (The K_a value for benzoic acid is 6.46 $\times$ 10^-⁵.)

Correct Answer
verified

A cup of coffee has a hydroxide ion concentration of 1 $\times$ 10^-¹⁰ M.What is the pH of this coffee?

Correct Answer
verified

What is the pH of a 0.20 M ammonia solution? (The K_b value for ammonia is 1.8 $\times$ 10^-⁵.)

Correct Answer
verified

Exam 15: Aqueous Equilibria-Chemistry of the Water World

In the following reaction in aqueous solution,the acid reactant is __________ and the base reactant is __________. OH-(aq) + C6H5NH3+(aq) ⇆\leftrightarrows⇆ C6H5NH2(aq) + H2O( )

Correct AnswerverifiedShow Answer

Which of the following would be the best choice for preparing a buffer with a pH = 8.0?

Correct AnswerverifiedShow Answer

Briefly explain how the carbonic acid-bicarbonate buffer solution stabilizes the pH of blood. CO2(aq)+ H2O( ) ⇆\leftrightarrows⇆ H2CO3(aq) ⇆\leftrightarrows⇆ H+(aq)+ HCO3-(aq)

Correct AnswerverifiedWhen acid is added,the system ...View AnswerShow Answer

Which of the following compounds cannot be a Brønsted-Lowry base?

Correct AnswerverifiedShow Answer

What would happen to the Ag+ and Cl- concentrations if NaCl(s) was added to a saturated solution of AgCl in water?

Correct AnswerverifiedShow Answer

A 0.100 M monoprotic weak acid solution has a pH of 3.00.What is the pKa of this acid?

Correct AnswerverifiedShow Answer

What is the percent dissociation of 0.20 M phenol? (The Ka value for phenol is 1.3 ×\times× 10-10.)

Correct AnswerverifiedShow Answer

Halfway to the equivalence point in a titration curve of a weak acid with a strong base,__________

Correct AnswerverifiedShow Answer

Which one of the following is NOT a strong acid?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the following reaction in aqueous solution,the acid reactant is __________ and the base reactant is __________. HCOOH(aq) + H2O( ) ⇆\leftrightarrows⇆ HCOO-(aq) + H3O+(aq)

Correct AnswerverifiedShow Answer

Ksp for mercury(II)iodide is 2.8 ×\times× 10-29 at 25°C.What is the molar solubility of HgI2,and what are the concentrations of Hg2+ and I-in a saturated solution?

Correct Answerverifieds = 1.9 10-10; [Hg...View AnswerShow Answer

Write the reaction showing the ionization of HCl and of HF in water.Indicate whether the extent of ionization is 100% or less than 100%.

Correct AnswerverifiedHCl(aq)+ H2O( _TB6561_11 )Cl<...View AnswerShow Answer

What is the pH of a 0.010 M acetic acid solution? (Ka for acetic acid is 1.76 ×\times× 10-5.)

Correct AnswerverifiedShow Answer

Write the reaction and equilibrium constant that describes the autoionization of water.

Correct Answerverified2 H2O H3...View AnswerShow Answer

Correct AnswerverifiedShow Answer

Sodium benzoate (NaC6H5COO) is a common food preservative.What is the pH of a 0.150 M NaC6H5COO solution? (The Ka value for benzoic acid is 6.46 ×\times× 10-5.)

Correct AnswerverifiedShow Answer

A cup of coffee has a hydroxide ion concentration of 1 ×\times× 10-10 M.What is the pH of this coffee?

Correct AnswerverifiedShow Answer

What is the pH of a 0.20 M ammonia solution? (The Kb value for ammonia is 1.8 ×\times× 10-5.)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
When acid is added,the system ...
View Answer

Correct Answer
verified

What would happen to the Ag⁺ and Cl^- concentrations if NaCl(s) was added to a saturated solution of AgCl in water?

Correct Answer
verified

A 0.100 M monoprotic weak acid solution has a pH of 3.00.What is the pK_a of this acid?

Correct Answer
verified

What is the percent dissociation of 0.20 M phenol? (The K_a value for phenol is 1.3 $\times$ 10^-¹⁰.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

K_sp for mercury(II)iodide is 2.8 $\times$ 10^-29 at 25°C.What is the molar solubility of HgI₂,and what are the concentrations of Hg²⁺ and I^-in a saturated solution?

Correct Answer
verified
s = 1.9 10^-10; [Hg...
View Answer

Correct Answer
verified
HCl(aq)+ H₂O( _TB6561_11 )Cl<...
View Answer

What is the pH of a 0.010 M acetic acid solution? (K_a for acetic acid is 1.76 $\times$ 10^-⁵.)

Correct Answer
verified

Correct Answer
verified
2 H₂O H₃...
View Answer

Correct Answer
verified

Sodium benzoate (NaC₆H₅COO) is a common food preservative.What is the pH of a 0.150 M NaC₆H₅COO solution? (The K_a value for benzoic acid is 6.46 $\times$ 10^-⁵.)

Correct Answer
verified

A cup of coffee has a hydroxide ion concentration of 1 $\times$ 10^-¹⁰ M.What is the pH of this coffee?

Correct Answer
verified

What is the pH of a 0.20 M ammonia solution? (The K_b value for ammonia is 1.8 $\times$ 10^-⁵.)

Correct Answer
verified