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6. A scientist needs to prepare an acetate buffered solution at pH 5.0. What is the final concentration of acetic acid (pKa = = 4.76) and sodium acetate she needs in the solution to have a create a final concentration of 25 mM?

6. A scientist needs to prepare an acetate buffered solution at pH 5.0. What is the final concentration of acetic acid (pKa = = 4.76) and sodium acetate she needs in the solution to have a create a final concentration of 25 mM?

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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6. A scientist needs to prepare an acetate buffered solution at pH 5.0. What is the final concentration of acetic acid (pKa 4.76) and sodium acetate she needs in the solution to have a create a final concentration of 25 mm? = 7. If you mix equal volumes of 0.1M NaOH with 0.2M acetic acid (pKa = 4.76) is the resulting solution a buffer? Why or why not? Given that the pKa of acetic acid is 4.76, what is the pH of the resulting solution? 8. You prepare a buffer by mixing 0.15 mol propanoic acid (pka 4.87) and 0.25 mol sodium propionate. You than add 0.025 mol of sodium hydroxide (NaOH) to the buffer mixture (assume there is no change in volume). What would the pH be after addition of NaOH? =
Transcribed Image Text:6. A scientist needs to prepare an acetate buffered solution at pH 5.0. What is the final concentration of acetic acid (pKa 4.76) and sodium acetate she needs in the solution to have a create a final concentration of 25 mm? = 7. If you mix equal volumes of 0.1M NaOH with 0.2M acetic acid (pKa = 4.76) is the resulting solution a buffer? Why or why not? Given that the pKa of acetic acid is 4.76, what is the pH of the resulting solution? 8. You prepare a buffer by mixing 0.15 mol propanoic acid (pka 4.87) and 0.25 mol sodium propionate. You than add 0.025 mol of sodium hydroxide (NaOH) to the buffer mixture (assume there is no change in volume). What would the pH be after addition of NaOH? =
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