More ratios. Through the use of nuclear magnetic resonancespectroscopy, it is possible to determine the ratio between theprotonated and deprotonated forms of buffers. (a) Suppose the ratioof [ A- ]A I to [HA] is determined to be 0.1 for a buffer withpKar6.0.pKa = 6.0. What is the pH? (b) For a different buffer,91974suppose the ratio of [ A- ]lA J to [HA] is determined to be 0.1 andthe pHpH is 7.0. In this case, what is the pKapKa of the buffer? (c) Foranother buffer with pKa=7.5PKa = 7.5 at pH 8.0pH 8.0, what is theexpected ratio of [ A- ][A ] to [HA]? do

From Henderson Hassel batch Equation pH = pKa +log [A*]/ [HA]

Answered: More ratios. Through the use of nuclear…

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

Problem 1P

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Titration curve of an unknown amino acid The graph below shows a curve, which was obtained following titration of an unknown amino acid. Include a suitable descriptive title stating the identity of the unknown amino acid Use rectangles to precisely outline the regions in the graph where ionisable groups show buffering activity (base/acid ratio 1:10 to base/acid ratio 10:1); clearly associate the name of the ionisable group with the buffering regions; indicate within the graph all observable titration mid-points and all observable titration end-points and indicate estimates of the pKa of the three functional groups (do not provide pka values from the literature, you need to read the pka from the titration curve provided). Note that it is not possible to estimate the pka with more than one decimal precision due to limited resolution of the shown graph.
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