How many grams of dry NH,Cl need to be added to 1.60 L of a 0.100 mol L- solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.54? K, for ammonia is 1.8 x 10. Express your answer to two significant figures and include the appropriate units.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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,
pKa = – log Ka
The Henderson-Hasselbalch equation is used to
calculate the pH of buffer solutions:
pH = pK, +log
base]
[acid]
%3D
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].
Transcribed Image Text:Just as pH is the negative logarithm of H3O+], pKa is the negative logarithm of Ka, pKa = – log Ka The Henderson-Hasselbalch equation is used to calculate the pH of buffer solutions: pH = pK, +log base] [acid] %3D 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].
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Part B
How many grams of dry NH, Cl need to be added to 1.60 L of a 0.100 mol L- solution of ammonia, NH3 , to prepare
a buffer solution that has a pH of 8.54? K, for ammonia is 1.8 x 10-5.
Express your answer to two significant figures and include the appropriate units.
• View Available Hint(s)
HA
mass of NH4CI =
Value
Units
%3D
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Transcribed Image Text:Submit Previous Answers v Correct Part B How many grams of dry NH, Cl need to be added to 1.60 L of a 0.100 mol L- solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.54? K, for ammonia is 1.8 x 10-5. Express your answer to two significant figures and include the appropriate units. • View Available Hint(s) HA mass of NH4CI = Value Units %3D Submit Previous Answers Incorrect; Try Again; 5 attempts remaining
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