Values of K, for Some Common Weak Bases Conjugate Acid Name Formula 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 NH3 CH;NH2 CH5NH2 CH;NH2 C3H;N NH,+ CH;NH3+ CH;NH3* CH;NH;+ CH;NH+ Pyridine Using the table of the weak base below, you have chosen Ethylamine 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 0.52 M in this salt. The desired pH of the buffer should be equal to 10.1. To prepare the buffer, a total volume of 500 mL is required. The stock solution of the weak base is available at 1 gallon with a concentration of 0.99 M. (Remember the lesson on dilution: C1V1=C2V2) 4. How many mL should be taken from the stock solution to prepare the desired buffer solution? (round off final answer to 2 decimal places)
Values of K, for Some Common Weak Bases Conjugate Acid Name Formula 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 NH3 CH;NH2 CH5NH2 CH;NH2 C3H;N NH,+ CH;NH3+ CH;NH3* CH;NH;+ CH;NH+ Pyridine Using the table of the weak base below, you have chosen Ethylamine 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 0.52 M in this salt. The desired pH of the buffer should be equal to 10.1. To prepare the buffer, a total volume of 500 mL is required. The stock solution of the weak base is available at 1 gallon with a concentration of 0.99 M. (Remember the lesson on dilution: C1V1=C2V2) 4. How many mL should be taken from the stock solution to prepare the desired buffer solution? (round off final answer to 2 decimal places)
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 100AP
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Transcribed Image Text:Values of K, for Some Common Weak Bases
Conjugate
Acid
Name
Formula
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
NH3
CH;NH2
CH5NH2
CH;NH2
C3H;N
NH,+
CH;NH3+
CH;NH3*
CH;NH;+
CH;NH+
Pyridine
Transcribed Image Text:Using the table of the weak base below, you have chosen Ethylamine 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 0.52 M in this salt. The desired pH of the buffer should be equal to 10.1.
To prepare the buffer, a total volume of 500 mL is required. The stock solution of the weak base is available at
1 gallon with a concentration of 0.99 M. (Remember the lesson on dilution: C1V1=C2V2)
4. How many mL should be taken from the stock solution to prepare the desired buffer solution?
(round off final answer to 2 decimal places)
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