CHEMISTRY:CENTRAL SCI.,V.1-PKG.>CUSTOM<
15th Edition
ISBN: 9781323444535
Author: Brown
Publisher: PEARSON C
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Chapter 9, Problem 99AE
A typical amino acid with one amino group and one carboxylic acid group, such as serine, can exist in water in several ionic forms.
- Suggest the forms of the amino acid at low PH and at high pH.
- Amino acids generally have two pKa values, one in the range of 2 to 3 and the other in the range of 9 to 10. Serine, for example, has pKa values of 2.19 and 9.21. Using species such as acetic acid and ammonia as models, suggest the origin of the two pKa values.
- Glutamic acid is an amino acid that has three pKa’s: 2.10, 4.07, and 9.47. Draw the structure of glutamic acid, and assign each pKa to the appropriate part of the molecule.
- An unknown amino acid is titrated with strong base, producing the following titration curve. Which amino acids are likely candidates for the unknown?
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Students have asked these similar questions
A typical amino acid with one amino group and one carboxylic acid group, such as serine can exist in water in several iconic forms.
Suggest the forms of the amino acid at low pH and at a high pH.
Amino acids generally have two pKa values, one in the range of 2 to 3 and the other in the range of 9 to 10. Serene, for example, has pKa values of 2.91 and 9.21. Using species such as acetic acid and ammonia as models, suggest the origin of the two pKa values.
Glutamic acid is an amino acid that has three pKa’s: 2.10, 4.07, and 9.47. Draw the structure of glutamic acid and assign each pKa to the appropriate part of the molecule.
An unknown amino acid is titrated with strong base, producing the following titration curve. Which amino acid are likely candidates for the unknown?
. Describe the pH range of acceptable buffering behavior for the amino acids alanine, histidine, aspartic acid, and lysine.
A typical amino acid with one amino group and one carboxylicacid group, such as serine, can exist in water in several ionic forms. (a) Suggest the forms of the amino acidat low pH and at high pH. (b) Amino acids generally havetwo pKa values, one in the range of 2 to 3 and the other inthe range of 9 to 10. Serine, for example, has pKa values of2.19 and 9.21. Using species such as acetic acid and ammoniaas models, suggest the origin of the two pKa values.(c) Glutamic acid is an amino acid that has threepKa's: 2.10, 4.07, and 9.47. Draw the structure of glutamicacid, and assign each pKa to the appropriate part of themolecule. (d) An unknown amino acid is titrated withstrong base, producing the following titration curve.Which amino acids are likely candidates for the unknown?
Chapter 9 Solutions
CHEMISTRY:CENTRAL SCI.,V.1-PKG.>CUSTOM<
Ch. 9.2 - Prob. 9.1.1PECh. 9.2 - Prob. 9.1.2PECh. 9.2 - Prob. 9.2.1PECh. 9.2 - Prob. 9.2.2PECh. 9.2 - Prob. 9.3.1PECh. 9.2 - Prob. 9.3.2PECh. 9.3 - Prob. 9.4.1PECh. 9.3 - Prob. 9.4.2PECh. 9.5 - Prob. 9.5.1PECh. 9.5 - Prob. 9.5.2PE
Ch. 9.6 - Prob. 9.6.1PECh. 9.6 - Prob. 9.6.2PECh. 9.6 - Prob. 9.7.1PECh. 9.6 - Prob. 9.7.2PECh. 9.7 - Prob. 9.8.1PECh. 9.7 - Prob. 9.8.2PECh. 9.8 - Prob. 9.9.1PECh. 9.8 - Prob. 9.9.2PECh. 9 - Prob. 1DECh. 9 - Prob. 1ECh. 9 - Prob. 2ECh. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - Prob. 5ECh. 9 - Prob. 6ECh. 9 - Prob. 7ECh. 9 - Prob. 8ECh. 9 - Prob. 9ECh. 9 - Prob. 10ECh. 9 - Prob. 11ECh. 9 - Prob. 12ECh. 9 - Prob. 13ECh. 9 - Prob. 14ECh. 9 - Prob. 15ECh. 9 - Prob. 16ECh. 9 - Prob. 17ECh. 9 - Prob. 18ECh. 9 - Prob. 19ECh. 9 - Prob. 20ECh. 9 - Prob. 21ECh. 9 - Prob. 22ECh. 9 - Prob. 23ECh. 9 - Prob. 24ECh. 9 - Prob. 25ECh. 9 - Prob. 26ECh. 9 - Prob. 27ECh. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - Prob. 30ECh. 9 - Prob. 31ECh. 9 - Prob. 32ECh. 9 - Prob. 33ECh. 9 - Prob. 34ECh. 9 - Prob. 35ECh. 9 - Prob. 36ECh. 9 - Prob. 37ECh. 9 - Prob. 38ECh. 9 - Prob. 39ECh. 9 - Prob. 40ECh. 9 - Prob. 41ECh. 9 - Prob. 42ECh. 9 - Prob. 43ECh. 9 - Describe the intermediate that is thought to form...Ch. 9 - Prob. 45ECh. 9 - Prob. 46ECh. 9 - Prob. 47ECh. 9 - Prob. 48ECh. 9 - (a) Starting with the orbital diagram of a boron...Ch. 9 - Prob. 50ECh. 9 - Prob. 51ECh. 9 - Prob. 52ECh. 9 - Prob. 53ECh. 9 - Prob. 54ECh. 9 - Prob. 55ECh. 9 - Prob. 56ECh. 9 - Prob. 57ECh. 9 - Prob. 58ECh. 9 - Prob. 59ECh. 9 - Prob. 60ECh. 9 - Prob. 61ECh. 9 - Prob. 62ECh. 9 - Prob. 63ECh. 9 - Prob. 64ECh. 9 - In the formate ion, HCO2-, the carbon atom is the...Ch. 9 -
9.66 Consider the Lewis structure shown below....Ch. 9 - Prob. 67ECh. 9 - Prob. 68ECh. 9 - Prob. 69ECh. 9 - Prob. 70ECh. 9 - Prob. 71ECh. 9 - Prob. 72ECh. 9 - Prob. 73ECh. 9 - (a) What is the probability of finding an electron...Ch. 9 - Prob. 75ECh. 9 - Prob. 76ECh. 9 - Prob. 77ECh. 9 - Prob. 78ECh. 9 - Prob. 79ECh. 9 - Prob. 80ECh. 9 - Prob. 81ECh. 9 - Prob. 82ECh. 9 - Prob. 83ECh. 9 - Prob. 84ECh. 9 - Prob. 85AECh. 9 - Prob. 86AECh. 9 - Prob. 87AECh. 9 - Prob. 88AECh. 9 - Prob. 89AECh. 9 - Prob. 90AECh. 9 - Prob. 91AECh. 9 - Prob. 92AECh. 9 - Prob. 93AECh. 9 - Prob. 94AECh. 9 - Prob. 95AECh. 9 - Prob. 96AECh. 9 - Prob. 97AECh. 9 - Prob. 98AECh. 9 - A typical amino acid with one amino group and one...Ch. 9 - The azide ion, N3-, is linear with two N—N bonds...Ch. 9 - Prob. 101AECh. 9 - Prob. 102AECh. 9 - Prob. 103AECh. 9 - Prob. 104AECh. 9 - Prob. 105AECh. 9 - Prob. 106AECh. 9 - How many hydrogen atoms are in 2, 2-...Ch. 9 - Prob. 108AECh. 9 - Prob. 109AECh. 9 - Prob. 110AECh. 9 - Prob. 111AECh. 9 - Prob. 112AECh. 9 - Prob. 113IECh. 9 - Prob. 114IECh. 9 - Prob. 115IECh. 9 - Prob. 116IECh. 9 - Practice Exercise 2 Name the dipeptide and give...Ch. 9 - How many chiral carbon atoms are there in the...Ch. 9 - Prob. 119IECh. 9 - Prob. 120IECh. 9 - Prob. 121IECh. 9 - Prob. 122IE
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- . For valine, methionine, GABA and proline, write the zwitterion. Using valine as an example, describe the behavior of the zwitterion in acidic (pH 2) and alkaline (pH 12) media.arrow_forwardGiven that C6H11COOH has a pKa = 4.8 and C6H11N + H3 has a pKa = 10.7, what pH would you make the water layer to cause both compounds to dissolve in it?arrow_forwardDraw the structures of the predominant forms of glutamic acid and tyrosine at pH 9.0 and pH 10.0. What is the second most abundant species at each pH?arrow_forward
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