▼ Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05? HF/KF HNO2/KNO2 NH3/NH4Cl OHCIO/KCIO Submit Previous Answers ✓ Correct The best buffer will be the one whose weak acid component has a pK, closest to the desired pH of the buffer. Since the pK₂ of NH4+ is 9.25, and the desired buffer pH is 9.05, the best choice for the buffer is NH3/NH4Cl. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer using two significant figures. [5] ΑΣΦ m (NH3) m (NH,CI) 3 → ?
▼ Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05? HF/KF HNO2/KNO2 NH3/NH4Cl OHCIO/KCIO Submit Previous Answers ✓ Correct The best buffer will be the one whose weak acid component has a pK, closest to the desired pH of the buffer. Since the pK₂ of NH4+ is 9.25, and the desired buffer pH is 9.05, the best choice for the buffer is NH3/NH4Cl. Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer using two significant figures. [5] ΑΣΦ m (NH3) m (NH,CI) 3 → ?
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 of the following buffer systems would be the best choice to create a buffer with pH = 9.05?
HF/KF
HNO2/KNO2
NH3/NH4Cl
HCIO/KCIO
Submit Previous Answers
Correct
The best buffer will be the one whose weak acid component has a pK₂ closest to the desired pH of the buffer. Since the pK₂ of NH4+ is 9.25, and the desired buffer pH is 9.05, the best choice for the buffer is
NH3/NH4Cl.
Part B
For the best system, calculate the ratio of the masses of the buffer components required to make the buffer.
Express your answer using two significant figures.
VT ΑΣΦ
m (NH3)
m (NH4Cl)
Submit
Poquest Answer
?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff7681cf5-978b-4bfc-b23d-497c54f8c859%2F7044a671-5df1-4fc1-90f8-e45e0db48396%2Fg10gr5_processed.png&w=3840&q=75)
Transcribed Image Text:Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05?
HF/KF
HNO2/KNO2
NH3/NH4Cl
HCIO/KCIO
Submit Previous Answers
Correct
The best buffer will be the one whose weak acid component has a pK₂ closest to the desired pH of the buffer. Since the pK₂ of NH4+ is 9.25, and the desired buffer pH is 9.05, the best choice for the buffer is
NH3/NH4Cl.
Part B
For the best system, calculate the ratio of the masses of the buffer components required to make the buffer.
Express your answer using two significant figures.
VT ΑΣΦ
m (NH3)
m (NH4Cl)
Submit
Poquest Answer
?
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