Part 2. Complete the table by identifying the ideal weak acid and conjugate base for each 250ml buffer solution. (Take note of the solution's pH and the pka of the acid used). Buffer Solution Weak Acid Phosphate H.PO. (Phosphoric acid) Concentration 0.50M 0.50M 0.50M 0.50M 0.010M 0.50M Phosphate Acetate Phosphate Phosphate Phosphate Conjugate Base H.PO. (Dihydrogen phosphate ion) pka 2.12 2.12 4.70 7.21 7.21 12.32 Desired pH 2.00 3.00 5.00 7.00 8.00 12.00
Part 2. Complete the table by identifying the ideal weak acid and conjugate base for each 250ml buffer solution. (Take note of the solution's pH and the pka of the acid used). Buffer Solution Weak Acid Phosphate H.PO. (Phosphoric acid) Concentration 0.50M 0.50M 0.50M 0.50M 0.010M 0.50M Phosphate Acetate Phosphate Phosphate Phosphate Conjugate Base H.PO. (Dihydrogen phosphate ion) pka 2.12 2.12 4.70 7.21 7.21 12.32 Desired pH 2.00 3.00 5.00 7.00 8.00 12.00
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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![Part 2. Complete the table by identifying the ideal weak acid and conjugate base for each 250ml buffer
solution. (Take note of the solution's pH and the pka of the acid used).
Buffer Solution
Weak Acid
Phosphate
Concentration
0.50M
0.50M
0.50M
0.50M
0.010M
0.50M
Phosphate
Acetate
Initial
Change
Equilibrium
Phosphate
Phosphate
Phosphate
H,PO.
(Phosphoric
acid)
Conjugate
Base
Buffer I
CH_CO_H/CH_COz
0.320M/0.320M
H.PO.
(Dihydrogen
phosphate ion)
0.19
-0.19
0
2. Fluoride buffer: pka = 3.17
Buffer I
HF/F
0.010M/0.010M
pka
2.12
Part 3. Create the "ICE" table for each buffer solutions in Part 2 by calculating the amounts of each
buffer components utilizing the Henderson-Hasselbalch equation, following the format:
2.12
4.70
7.21
7.21
12.32
0
+0.19
0.19
[Insert Acid] + [Insert Base] → [Insert Conjugate Base] + [Insert
Conjugate Acid)
0.44
-0.19
0.25
Desired pH
2.00
3.00
5.00
7.00
NOTE: Insert the appropriate Acid, Base, Conjugate Base, and Conjugate acid for each buffer reactions.
Moreover, compute for each value of each components. Remember to include the units "moles. (Show
your complete solutions).
8.00
12.00
Part 4. Compare the each pair of buffer solutions and analyze which one has a higher and greater
degree of buffering capacity. (Show your complete solutions).
1. Acetate buffer: pka = 4.7
Buffer II
CH3CO₂H/CH3CO₂
0.0300M/0.0300M
Buffer II
HF/F
0.0290M/0.0290M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2932e570-f10e-4874-b0ff-0b74345f00d3%2F120deb39-bb00-4373-95ba-2be2bea4124f%2Fy79lorn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Part 2. Complete the table by identifying the ideal weak acid and conjugate base for each 250ml buffer
solution. (Take note of the solution's pH and the pka of the acid used).
Buffer Solution
Weak Acid
Phosphate
Concentration
0.50M
0.50M
0.50M
0.50M
0.010M
0.50M
Phosphate
Acetate
Initial
Change
Equilibrium
Phosphate
Phosphate
Phosphate
H,PO.
(Phosphoric
acid)
Conjugate
Base
Buffer I
CH_CO_H/CH_COz
0.320M/0.320M
H.PO.
(Dihydrogen
phosphate ion)
0.19
-0.19
0
2. Fluoride buffer: pka = 3.17
Buffer I
HF/F
0.010M/0.010M
pka
2.12
Part 3. Create the "ICE" table for each buffer solutions in Part 2 by calculating the amounts of each
buffer components utilizing the Henderson-Hasselbalch equation, following the format:
2.12
4.70
7.21
7.21
12.32
0
+0.19
0.19
[Insert Acid] + [Insert Base] → [Insert Conjugate Base] + [Insert
Conjugate Acid)
0.44
-0.19
0.25
Desired pH
2.00
3.00
5.00
7.00
NOTE: Insert the appropriate Acid, Base, Conjugate Base, and Conjugate acid for each buffer reactions.
Moreover, compute for each value of each components. Remember to include the units "moles. (Show
your complete solutions).
8.00
12.00
Part 4. Compare the each pair of buffer solutions and analyze which one has a higher and greater
degree of buffering capacity. (Show your complete solutions).
1. Acetate buffer: pka = 4.7
Buffer II
CH3CO₂H/CH3CO₂
0.0300M/0.0300M
Buffer II
HF/F
0.0290M/0.0290M
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