Part B For the best system, calculate the ratio of the masses of the buffer components required to make the buffer

Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter14: Acid- Base Equilibria
Section: Chapter Questions
Problem 4RQ: A good buffer generally contains relatively equal concentrations of weak acid and conjugate base. If...
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Only part B

Part A
Which butter system is the best choice to create a butter with pH = 7.107
HCIO₂/KCIO₂
HC₂H₂O₂/KC₂H₂O₂
NHI/NH CƯ
• HCIO/KCIO
Previous Answers
✓ Correct
The effective range for a buffering system is one pH unit on either side of pK, Therefore, calculate the pK, for each buffer system. For HC₂H₂O₂/KC₂H₂O2.
For HC10₂/KC1O₂, pK, 1.96 for HCIO/KCIO. pK,-7.54; and, for NH₂/NH4Cl
pk₁-
14.00-pk
14.00 4.754
Part B
m(KCIO)
m(HCIO)
So, HCIO/KCIO is the best choice to create a buffer with pH 7.10 because HCIO has the pk, value that is closest to 7.10.
pk = -log K₁
--log(1.8 x 10-5
4.74
For the best system, calculate the ratio of the masses of the butter components required to make the buffer.
Express your answer to two significant figures.
VE ΑΣΦΑ
.79
Submit Previous Answers Request Answer
X Incorrect; Try Again; 7 attempts remaining
-9.25
Review I Constants 1 Periodic Table
?
Transcribed Image Text:Part A Which butter system is the best choice to create a butter with pH = 7.107 HCIO₂/KCIO₂ HC₂H₂O₂/KC₂H₂O₂ NHI/NH CƯ • HCIO/KCIO Previous Answers ✓ Correct The effective range for a buffering system is one pH unit on either side of pK, Therefore, calculate the pK, for each buffer system. For HC₂H₂O₂/KC₂H₂O2. For HC10₂/KC1O₂, pK, 1.96 for HCIO/KCIO. pK,-7.54; and, for NH₂/NH4Cl pk₁- 14.00-pk 14.00 4.754 Part B m(KCIO) m(HCIO) So, HCIO/KCIO is the best choice to create a buffer with pH 7.10 because HCIO has the pk, value that is closest to 7.10. pk = -log K₁ --log(1.8 x 10-5 4.74 For the best system, calculate the ratio of the masses of the butter components required to make the buffer. Express your answer to two significant figures. VE ΑΣΦΑ .79 Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining -9.25 Review I Constants 1 Periodic Table ?
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