If you were to titrate L-ornithine with NaOH, you would record the following titrationcurve:PHa62boсeOH- equivalentsa. What is the net charge of L-ornithine at the start of the titration (i.e. when all theionizable groups are in their HA form)?b. Which group in L-ornithine is the first to lose a proton in the titration?c. How many molar equivalents of OH have been added at point c in the titration?d. Where on the titration curve is the net charge of L-ornithine zero, and what is the pHat this point?e. What is the pH at which the net charge of L-ornithine is zero?f. Draw the structure of L-ornithine with a net charge of zero. Titration of a polyprotic acid4. L-ornithine is a metabolic intermediate in mammals. It is involved in the Urea Cycle,the process by which animals remove nitrogen wastes from the body. L-ornithine isalso used as a nutritional supplement, with alleged benefits such as decreasing fatigue,enhancing wound healing and reducing anxiety. L-ornithine contains 3 ionizablegroups, x, y & z, with the following pKa’s (pKax = 10.76; pKay = 8.69; pKaz = 1.71).The structure of L-ornithine in the fully protonated form is shown below. Let us analyzethe acid-base behavior of L-ornithine.x +H3NL-ornithineNH3+уOHZ

In this question, we are given a titration curve of the amino acid L-ornithine.It is a basic amino…

Answered: If you were to titrate L-ornithine with…

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If you were to titrate L-ornithine with NaOH, you would record the following titration curve: PH a OP bo с er e

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter14: Acid- Base Equilibria

Section: Chapter Questions

Problem 118CP: Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH,...

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Question

If you were to titrate L-ornithine with NaOH, you would record the following titration
curve:
PH
a
62
bo
с
e
OH- equivalents
a. What is the net charge of L-ornithine at the start of the titration (i.e. when all the
ionizable groups are in their HA form)?
b. Which group in L-ornithine is the first to lose a proton in the titration?
c. How many molar equivalents of OH have been added at point c in the titration?
d. Where on the titration curve is the net charge of L-ornithine zero, and what is the pH
at this point?
e. What is the pH at which the net charge of L-ornithine is zero?
f. Draw the structure of L-ornithine with a net charge of zero.

Titration of a polyprotic acid
4. L-ornithine is a metabolic intermediate in mammals. It is involved in the Urea Cycle,
the process by which animals remove nitrogen wastes from the body. L-ornithine is
also used as a nutritional supplement, with alleged benefits such as decreasing fatigue,
enhancing wound healing and reducing anxiety. L-ornithine contains 3 ionizable
groups, x, y & z, with the following pKa’s (pKax = 10.76; pKay = 8.69; pKaz = 1.71).
The structure of L-ornithine in the fully protonated form is shown below. Let us analyze
the acid-base behavior of L-ornithine.
x +H3N
L-ornithine
NH3+
у
OH
Z

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