Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
![What is the pH of a 0.44 M solution of the weak base C6H5NH₂ (aniline)?
Kb=4.2 × 10-10
a 4.87
b. 9.13
c. 9.73
d. 9.31
e. 13.14
Which of the following acids is the weakest?
a. H₂Se
6 HCI
c. H₂O
d. HF
e. H₂S
Which salt would produce an acidic solution when dissolved in water?
a. K₂SO4
b. NH₂Cl
c. NaCN
a. 2.6 x 10-6
b. 5.3 × 10-8
c. 0.0024
The pH of a solution of a weak monoprotic acid (HA) is 2.96. The acid concentration in aqueous
solution is 0.455 M. What is the acid dissociation constant, K₂?
CaCO3
KF
e.
0.154
1.1 × 10-3
A buffer is made with 1.25 M acetic acid (HC₂H₂O₂) and 1.00 M sodium acetate (NaC₂H₂O₂). Which
statement correctly describes what happens when 0.15 M KOH is added to the buffer?
a. Acetic acid neutralizes the KOH and the pH rises slightly.
6.
The acetate ion neutralizes the KOH and the pH falls slightly.
Acetic acid neutralizes the KOH and the pH falls slightly.
d.
The acetate ion neutralizes the KOH and the pH rises slightly.
e. There is no way to predict what happens.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00286e1f-3dfa-463d-8755-33d1f443cb43%2F9708bdf7-6d9e-433e-99d6-280947bd80cc%2Fatryv82f_processed.jpeg&w=3840&q=75)
Transcribed Image Text:What is the pH of a 0.44 M solution of the weak base C6H5NH₂ (aniline)?
Kb=4.2 × 10-10
a 4.87
b. 9.13
c. 9.73
d. 9.31
e. 13.14
Which of the following acids is the weakest?
a. H₂Se
6 HCI
c. H₂O
d. HF
e. H₂S
Which salt would produce an acidic solution when dissolved in water?
a. K₂SO4
b. NH₂Cl
c. NaCN
a. 2.6 x 10-6
b. 5.3 × 10-8
c. 0.0024
The pH of a solution of a weak monoprotic acid (HA) is 2.96. The acid concentration in aqueous
solution is 0.455 M. What is the acid dissociation constant, K₂?
CaCO3
KF
e.
0.154
1.1 × 10-3
A buffer is made with 1.25 M acetic acid (HC₂H₂O₂) and 1.00 M sodium acetate (NaC₂H₂O₂). Which
statement correctly describes what happens when 0.15 M KOH is added to the buffer?
a. Acetic acid neutralizes the KOH and the pH rises slightly.
6.
The acetate ion neutralizes the KOH and the pH falls slightly.
Acetic acid neutralizes the KOH and the pH falls slightly.
d.
The acetate ion neutralizes the KOH and the pH rises slightly.
e. There is no way to predict what happens.
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