Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer solution. You have already added enough of the conjugate acid salt to make the buffer solution concentration at 0.48 M in this salt. The desired pH of the buffer should be equal to 9.75. Values of Kp for Some Common Weak Bases Conjugate Acid Name Formula NH3 CH;NH2 C¿H;NH2 CH;NH2 C;H;N 1.8 × 10-5 4.38 × 10-4 5.6 × 10-4 3.8 × 10-10 1.7 × 10-9 Ammonia Methylamine Ethylamine Aniline Pyridine NH,+ CH3NH3* CH§NH3* C¢H;NH;+ C;H;NH+ 2. Compute for pKb. (round off final answer to 2 decimal places)
Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer solution. You have already added enough of the conjugate acid salt to make the buffer solution concentration at 0.48 M in this salt. The desired pH of the buffer should be equal to 9.75. Values of Kp for Some Common Weak Bases Conjugate Acid Name Formula NH3 CH;NH2 C¿H;NH2 CH;NH2 C;H;N 1.8 × 10-5 4.38 × 10-4 5.6 × 10-4 3.8 × 10-10 1.7 × 10-9 Ammonia Methylamine Ethylamine Aniline Pyridine NH,+ CH3NH3* CH§NH3* C¢H;NH;+ C;H;NH+ 2. Compute for pKb. (round off final answer to 2 decimal places)
Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Chapter9: Acids, Bases, And Salts
Section: Chapter Questions
Problem 9.128E
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Question
![Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer solution. You have already
added enough of the conjugate acid salt to make the buffer solution concentration at 0.48 M in this salt. The desired pH of the buffer
should be equal to 9.75.
Values of K, for Some Common Weak Bases
Conjugate
Acid
Name
Formula
Ammonia
Methylamine
Ethylamine
Aniline
Pyridine
NH3
CH;NH2
CH5NH2
C,H;NH,
C;H;N
NH,+
CH;NH3+
CH;NH3*
CH;NH3+
C;H;NH+
1.8 × 10-5
4.38 x 10-
5.6 x 10-4
3.8 x 10-10
1.7 x 10-9
2. Compute for pKb.
(round off final answer to 2 decimal places)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1d4d96ca-4e1f-4e1c-8747-f9f211718b5c%2Fd24b44a5-47a4-4a22-a56b-824641502814%2Fdsdbnfe_processed.png&w=3840&q=75)
Transcribed Image Text:Using the table of the weak base below, you have chosen Methylamine as your weak base in the buffer solution. You have already
added enough of the conjugate acid salt to make the buffer solution concentration at 0.48 M in this salt. The desired pH of the buffer
should be equal to 9.75.
Values of K, for Some Common Weak Bases
Conjugate
Acid
Name
Formula
Ammonia
Methylamine
Ethylamine
Aniline
Pyridine
NH3
CH;NH2
CH5NH2
C,H;NH,
C;H;N
NH,+
CH;NH3+
CH;NH3*
CH;NH3+
C;H;NH+
1.8 × 10-5
4.38 x 10-
5.6 x 10-4
3.8 x 10-10
1.7 x 10-9
2. Compute for pKb.
(round off final answer to 2 decimal places)
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