Consider the following table: Name Formula Conjugate Acid 1.8 x 10 5 4.38 х 10 4 NH3 NH,+ Ammonia Methylamine CH3NH, CH;NH,+ 4.38 x 10 CH,NH, + Ethylamine C,Hg NH, C2H,NH3+ 5.6 x 10 4 C,Hg NH, C,H5NH,* 3.8 x 10-10 O;H;NH* Aniline C; H;N 1.7 x 10° Pyridine Which base would be the best choice for preparing a pH = 9.50 buffer? pyridine aniline ethylamine methylamine ammonia

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter23: Amines
Section: Chapter Questions
Problem 23.31P
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Consider the following table:
Name
Formula Conjugate Acid
NH,+
CHB NH3 + 4.38 х 10
C;H, NH3 +
C;H;NH, CgH5 NH3+
C5Hg NH+
Ammonia
NH3
1.8 x 10
Methylamine CH,NH2
Ethylamine C2H5 NH2
5.6 x 10 4
Aniline
3.8 x 10-10
Pyridine
C;H;N
1.7 x 10
Which base would be the best choice for preparing a pH = 9.50 buffer?
pyridine
aniline
ethylamine
methylamine
ammonia
Transcribed Image Text:Consider the following table: Name Formula Conjugate Acid NH,+ CHB NH3 + 4.38 х 10 C;H, NH3 + C;H;NH, CgH5 NH3+ C5Hg NH+ Ammonia NH3 1.8 x 10 Methylamine CH,NH2 Ethylamine C2H5 NH2 5.6 x 10 4 Aniline 3.8 x 10-10 Pyridine C;H;N 1.7 x 10 Which base would be the best choice for preparing a pH = 9.50 buffer? pyridine aniline ethylamine methylamine ammonia
Expert Solution
Step 1

For best buffer solution pH of the solution should be equal to pKa of acid. 

For effective buffer solution buffer range of the solution should be in the range pKa +1 to pKa -1.

 

 

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