Question 64 W Sample pH Before Filtration Mass of Crystals 1 8.5 0.00 g 7.4 0.00 g 3 6.8 0.03 g 4 5.5 0.52 g 4.6 3.12 g 3.1 10.17 g 7 2.0 10.91 g Benzoic acid, HC,H;O2, has a pK. of 4.20 and a molar solubility of 0.0278 M. Sodium benzoate, NaC7H;O2, has a molar solubility of 4.16 M. Several 50.0 mL samples of 2.00 M NaC,H;O2(aq) are treated with 3.00 M HCI, the pH is recorded, and any solid crystals are filtered, dried, and weighed. The data from the experiment are given in the table above. Which of the following best explains the experimental results? When pH < pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from A the solution. When pH < pKa, [NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from the solution. When pH > pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from C the solution. When pH > pKa, [NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from the solution. 6.
Question 64 W Sample pH Before Filtration Mass of Crystals 1 8.5 0.00 g 7.4 0.00 g 3 6.8 0.03 g 4 5.5 0.52 g 4.6 3.12 g 3.1 10.17 g 7 2.0 10.91 g Benzoic acid, HC,H;O2, has a pK. of 4.20 and a molar solubility of 0.0278 M. Sodium benzoate, NaC7H;O2, has a molar solubility of 4.16 M. Several 50.0 mL samples of 2.00 M NaC,H;O2(aq) are treated with 3.00 M HCI, the pH is recorded, and any solid crystals are filtered, dried, and weighed. The data from the experiment are given in the table above. Which of the following best explains the experimental results? When pH < pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from A the solution. When pH < pKa, [NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from the solution. When pH > pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from C the solution. When pH > pKa, [NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from the solution. 6.
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 64
Sample
pH Before Filtration
Mass of Crystals
1
8.5
0.00 g
7.4
0.00 g
6.8
0.03 g
4
5.5
0.52 g
5
4.6
3.12 g
3.1
10.17 g
7
2.0
10.91 g
Benzoic acid, HC7H;O2, has a pK, of 4.20 and a molar solubility of 0.0278 M. Sodium benzoate,
NaC7H;O2, has a molar solubility of 4.16 M. Several 50.0 mL samples of 2.00 M NaC,H;O2(aq) are
treated with 3.00 M HCI, the pH is recorded, and any solid crystals are filtered, dried, and weighed. The
data from the experiment are given in the table above. Which of the following best explains the experimental
results?
When pH < pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from
A
the solution.
When pH < pK., [NaC,H;O2] > [HC;H;O2] and NaC-H;O2(s) precipitates from
В
the solution.
When pH > pKa, [HC,H;O2] > [NaC,H;O2] and HC;H;O2(s) precipitates from
the solution.
When pH > pKa, NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from
D
the solution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdb150bb4-21d7-4a79-9cf5-b28d74614c67%2Fa2f8283c-108a-4902-af82-56bcf4eab9f7%2Fdmdyllc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Question 64
Sample
pH Before Filtration
Mass of Crystals
1
8.5
0.00 g
7.4
0.00 g
6.8
0.03 g
4
5.5
0.52 g
5
4.6
3.12 g
3.1
10.17 g
7
2.0
10.91 g
Benzoic acid, HC7H;O2, has a pK, of 4.20 and a molar solubility of 0.0278 M. Sodium benzoate,
NaC7H;O2, has a molar solubility of 4.16 M. Several 50.0 mL samples of 2.00 M NaC,H;O2(aq) are
treated with 3.00 M HCI, the pH is recorded, and any solid crystals are filtered, dried, and weighed. The
data from the experiment are given in the table above. Which of the following best explains the experimental
results?
When pH < pKa, [HC;H;O2] > [NaC,H;O2] and HC,H;O2(s) precipitates from
A
the solution.
When pH < pK., [NaC,H;O2] > [HC;H;O2] and NaC-H;O2(s) precipitates from
В
the solution.
When pH > pKa, [HC,H;O2] > [NaC,H;O2] and HC;H;O2(s) precipitates from
the solution.
When pH > pKa, NaC,H;O2] > [HC;H;O2] and NaC,H;O2(s) precipitates from
D
the solution.
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