Which solution is closest to the pKa? Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 NaOH. Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 HCl.
Which solution is closest to the pKa? Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 NaOH. Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 HCl.
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
- Which solution is closest to the pKa?
- Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 NaOH.
- Calculate the pH of the solutions and the change in pH after adding 5.00 mL of 0.10-mol L-1 HCl.
- Which solution is most resistant to pH change?
- Which solution is least resistant to pH change?
![5. From the stock solutions of 1.00-mol L acetic acid and 1.00-mol L of sodium acetate, six
solutions were prepared with the acetic acid and acetate concentrations shown in the table
below. The pK of acetic acid is 4.756.
Solutio
[Acetic acid],
[Acetate],
Final volume,
mal
mal L
mL
A.
0.0000351
100
0.10
0.10
100
.010
0.010
100
0.10
0.15
100
0.15
0.10
100
a. Determine the volume of the stock solutions of 1.00-mol Lacetic acid and 1.00-mol L
of sodium acetate needed to prepare the solutions. Write your answer in the table below.
[Acetic acid],.
Vol. acetic acid,
[Acetatel.
Vol. of acetate,
Final volume,
Solution
mL
ml
mal L
mal
0.0000351
100
A
0.00351
0.00
0.10
10.0
0.10
10.0
100
C.
0.010
1.00
0.010
1.0
100
0.15
15.0
100
D.
0.10
10.0
0.15
15.0
0.10
10.0
100
b. Calculate for the initial pH of the solutions and write the pH in the table below.
CHY 47.1 Basic Biochemistry, Laboratory
Solution
[Acetic acid], mol L
[Acetate], molL
Initial pH
0.0000351
5.76
0.10
0.10
4.756
0.010
0010
4.756
0.10
0.15
4.580
0.15
0.10
4.932
* Use quadratic formula:
https://www.calculatorsoup.com/calculators/algebralquadratic-formula-calculator.php
ax' + bx + c=0
c. Which solution(s) have the same pH?
d. Which solution is closest to the pk ?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdd84f37f-4b1c-470e-80c9-940c2e9ca664%2F97b9f4d8-c6d7-45be-9b45-20878e4e8d2c%2Fyelqtlf_processed.png&w=3840&q=75)
Transcribed Image Text:5. From the stock solutions of 1.00-mol L acetic acid and 1.00-mol L of sodium acetate, six
solutions were prepared with the acetic acid and acetate concentrations shown in the table
below. The pK of acetic acid is 4.756.
Solutio
[Acetic acid],
[Acetate],
Final volume,
mal
mal L
mL
A.
0.0000351
100
0.10
0.10
100
.010
0.010
100
0.10
0.15
100
0.15
0.10
100
a. Determine the volume of the stock solutions of 1.00-mol Lacetic acid and 1.00-mol L
of sodium acetate needed to prepare the solutions. Write your answer in the table below.
[Acetic acid],.
Vol. acetic acid,
[Acetatel.
Vol. of acetate,
Final volume,
Solution
mL
ml
mal L
mal
0.0000351
100
A
0.00351
0.00
0.10
10.0
0.10
10.0
100
C.
0.010
1.00
0.010
1.0
100
0.15
15.0
100
D.
0.10
10.0
0.15
15.0
0.10
10.0
100
b. Calculate for the initial pH of the solutions and write the pH in the table below.
CHY 47.1 Basic Biochemistry, Laboratory
Solution
[Acetic acid], mol L
[Acetate], molL
Initial pH
0.0000351
5.76
0.10
0.10
4.756
0.010
0010
4.756
0.10
0.15
4.580
0.15
0.10
4.932
* Use quadratic formula:
https://www.calculatorsoup.com/calculators/algebralquadratic-formula-calculator.php
ax' + bx + c=0
c. Which solution(s) have the same pH?
d. Which solution is closest to the pk ?
Transcribed Image Text:e. Calculate the pH of the solutions and the change in pH after adding 5.00 ml of 0.10-
mol L NaOH.
Solution
Initial pH
Final pH
pH change
f.
Calculate the pH of the solutions and the change in pH after adding 5.00 ml of 0.10-
mol L HCL.
5
CHY 47.1 Basic Biochemistry, Laboratory
Solution
Initial pH
Final pH
pH change
A
g. Which solution is most resistant to pH change?
h. Which solution is least resistant to pH change?
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