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 NH, CH:NH 1.8 x 10-5 4.38 x 10-4 5.6 x 10-4 3.8 x 10-10 1.7 x 10-9 Ammonia Methylamine Ethylamine Aniline Pyridine NH3 CH;NH2 CH§NH; CH;NH; C;H;N CH;NH3* CH,NH; C;H¿NH* 2. Compute for pKb. (round off final answer to 2 decimal places)

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Chapter15: Acid-base Equilibria
Section: Chapter Questions
Problem 8ALQ: You have a solution of the weak acid HA and add some of the salt NaA to it. What are the major...
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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
NH,+
CH3NH3+
CH;NH;+
C̟H;NH3*
C;H;NH
1.8 × 10-5
4.38 x 10-4
5.6 x 10-4
3.8 x 10-10
1.7 x 10-9
Ammonia
Methylamine
Ethylamine
Aniline
Pyridine
NH3
CH;NH2
CH5NH2
C̟H;NH2
C;H;N
2. Compute for pKb.
(round off final answer to 2 decimal places)
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 NH,+ CH3NH3+ CH;NH;+ C̟H;NH3* C;H;NH 1.8 × 10-5 4.38 x 10-4 5.6 x 10-4 3.8 x 10-10 1.7 x 10-9 Ammonia Methylamine Ethylamine Aniline Pyridine NH3 CH;NH2 CH5NH2 C̟H;NH2 C;H;N 2. Compute for pKb. (round off final answer to 2 decimal places)
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