Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Chapter 15, Problem 47E
The salt bridges that hold hair protein (keratin) strands together rely on
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Examine the structure of the following amino acid and answer the questions below:
Name the amino acid.
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Write the Zwitter ionic form of aminoacetic acid.
You have 1 M (1 mol/L) solution of amino acid. This amino acid has an alpha carboxyl group with pKa = 2.0 and an alpha-
amino group with pKa = 10.0. The pH of the solution is 7.0. Calculate the concentration of the molecular form of this
amino acid that has carboxyl group protonated (COOH) and, at the same time, the amino group deprotonated (NH2).
Chapter 15 Solutions
Chemistry In Focus
Ch. 15 - Prob. 15.1YTCh. 15 - Prob. 1SCCh. 15 - Prob. 2SCCh. 15 - Prob. 3SCCh. 15 - Prob. 1ECh. 15 - Prob. 2ECh. 15 - Prob. 3ECh. 15 - Prob. 4ECh. 15 - Prob. 5ECh. 15 - Prob. 6E
Ch. 15 - Prob. 7ECh. 15 - Prob. 8ECh. 15 - Prob. 9ECh. 15 - Prob. 10ECh. 15 - Prob. 11ECh. 15 - Prob. 12ECh. 15 - Prob. 13ECh. 15 - Define eutrophication.Ch. 15 - Prob. 15ECh. 15 - Prob. 16ECh. 15 - Prob. 17ECh. 15 - Prob. 18ECh. 15 - Prob. 19ECh. 15 - What are the three types of interactions that...Ch. 15 - Prob. 21ECh. 15 - Prob. 22ECh. 15 - Prob. 23ECh. 15 - Prob. 24ECh. 15 - Prob. 25ECh. 15 - Prob. 26ECh. 15 - Prob. 27ECh. 15 - Prob. 28ECh. 15 - Prob. 29ECh. 15 - How do sunscreens protect your skin from the Suns...Ch. 15 - Prob. 31ECh. 15 - Prob. 32ECh. 15 - Prob. 33ECh. 15 - Prob. 34ECh. 15 - Prob. 35ECh. 15 - Prob. 36ECh. 15 - Prob. 37ECh. 15 - Prob. 38ECh. 15 - Prob. 39ECh. 15 - Prob. 40ECh. 15 - Prob. 41ECh. 15 - Prob. 42ECh. 15 - Prob. 43ECh. 15 - Prob. 44ECh. 15 - Prob. 45ECh. 15 - Prob. 46ECh. 15 - The salt bridges that hold hair protein (keratin)...Ch. 15 - Prob. 48ECh. 15 - The hydrochloric acid present in toilet bowl...Ch. 15 - Prob. 50ECh. 15 - Prob. 51ECh. 15 - Prob. 52ECh. 15 - Prob. 53ECh. 15 - Prob. 54ECh. 15 - Prob. 55ECh. 15 - Prob. 56ECh. 15 - Prob. 57ECh. 15 - Prob. 58ECh. 15 - Prob. 59ECh. 15 - Prob. 60ECh. 15 - Prob. 61ECh. 15 - Prob. 62ECh. 15 - Prob. 64ECh. 15 - Prob. 65E
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- (a) Draw the Lewis structure for the amino acid phenylalanine, showing the amino group and the carboxylic group in their un-ionized forms. (b) Draw the Lewis structure for the zwitterionic form of phenylalanine. (c) Which of these structures will be the predominant form at physiological pH?arrow_forwardA monobasic acid has a neutralization equivalent of 136 + 1. This acid burns with a sooty flame, gives negative tests for nitrogen, sulfur and the halogens, and is insoluble in water and 5% NaOH. Give a possible structure for this monobasic acid.arrow_forwardThe protein neuroglobin has a heme group associated with it. It is an example of a Ο Ο Ο Ο Ο Ο lipoprotein nucleoprotein glycoprotein phosphoprotein O metalloprotein Ⓒhemoproteinarrow_forward
- 2. In the space provided, draw the structure of valine (val) at each of the following pH values. Valine has a pl of 5.97. CH₁ CH-CH, H₂N-C-COOH H a) pH = 4.34 Valine (Val) b) pH = 5.97arrow_forwardThe first step in the procedure asks you to prepare five dilutions of the protein standard (BSA) in the range of 0.2 to 1.0 mg/ml. For each concentration, a volume of 1.0 mL should be prepared. Describe how you will prepare these standards using a stock solution of BSA that is 2.0 mg/ml.arrow_forwardGlutamic acid has three ionizable groups. The pKa of α-COOH is 2.19; α-NH 3 + , 9.67; and the R-group, 4.25. What is the charge of glutamic acid at pH 10.00?arrow_forward
- A 1.369 g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt (ACES¯K+, MW = 220.29 g/mol) is dissolved in 76.76 mL of water. To the solution, 18.44 mL of HCl is added, resulting in a pH of 6.91. Calculate the concentration of the HCl solution. The pKa of ACES is 6.85. [HC1] = = Enter numeric value Marrow_forward______ amino acids are considered essential.a. 5b. 10c. 15d. 20arrow_forwardWould Na2CO3 react with HCl? Write the chemical equation. Write the chemical equation for the reaction of NaHCO3 with HCl.arrow_forward
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