How many grams of dry NH4C1 need to be added to 2.00 L of a 0.600 mol L¬' solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.80? Kp for ammonia is 1.8 × 10¬5. Express your answer to two significant figures and include the appropriate units.
How many grams of dry NH4C1 need to be added to 2.00 L of a 0.600 mol L¬' solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.80? Kp for ammonia is 1.8 × 10¬5. Express your answer to two significant figures and include the appropriate units.
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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![Just as pH is the negative logarithm of [H3O+],
pKa is the negative logarithm of Ka,
- log Ka
The Henderson-Hasselbalch equation is used to
calculate the pH of buffer solutions:
How many grams of dry NH4C1 need to be added to
2.00 L of a 0.600 mol L-' solution of ammonia, NH3,
to prepare a buffer solution that has a pH of 8.80? Kh
for ammonia is 1.8 × 10–5.
pKa
base]
pH = pKa +log acid
Express your answer to two significant figures and
include the appropriate units.
Notice that the pH of a buffer has a value close to
the pKa of the acid, differing only by the logarithm
of the concentration ratio [base]/[acid].
• View Available Hint(s)
?
X•10n
Value
mass of
NHẠCI =
Units](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fce6b922d-a9d5-4170-acac-947c1495a450%2Fa6fe48f6-98c6-4c20-b6c9-d1f2dd9681e4%2Fijpailn_processed.png&w=3840&q=75)
Transcribed Image Text:Just as pH is the negative logarithm of [H3O+],
pKa is the negative logarithm of Ka,
- log Ka
The Henderson-Hasselbalch equation is used to
calculate the pH of buffer solutions:
How many grams of dry NH4C1 need to be added to
2.00 L of a 0.600 mol L-' solution of ammonia, NH3,
to prepare a buffer solution that has a pH of 8.80? Kh
for ammonia is 1.8 × 10–5.
pKa
base]
pH = pKa +log acid
Express your answer to two significant figures and
include the appropriate units.
Notice that the pH of a buffer has a value close to
the pKa of the acid, differing only by the logarithm
of the concentration ratio [base]/[acid].
• View Available Hint(s)
?
X•10n
Value
mass of
NHẠCI =
Units
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