
Concept explainers
Interpretation:
The structures and Ka values of any five amino acids are to be written and their strengths are to be compared with weak acids.
Concept introduction:
The Ka value of an acid can be used to determine the acidic strength of any acid.

Answer to Problem 122A
The structures and Ka values of five amino acids are given below:
Amino Acid | Structure | Ka Value |
Alanine | ![]() |
0.00457 |
Leucine | ![]() |
0.00436 |
Valine | ![]() |
0.00478 |
Serine | ![]() |
0.00616 |
Glutamine | ![]() |
0.00676 |
These Ka values are very large when compared to the Ka values of weak acids in given table.
Explanation of Solution
The amino acids have stable conjugate bases and therefore they are more acidic when compared to the given weak acids. Hence, the Ka values of amino acids are much larger than those of the given weak acids.
Chapter 18 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
Additional Science Textbook Solutions
Campbell Essential Biology (7th Edition)
Chemistry: Structure and Properties (2nd Edition)
Campbell Biology (11th Edition)
Human Anatomy & Physiology (2nd Edition)
Microbiology: An Introduction
College Physics: A Strategic Approach (3rd Edition)
- Identifying electron-donating and For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects NH2 ○ donating NO2 Explanation Check withdrawing no inductive effects Resonance Effects Overall Electron-Density ○ donating O withdrawing O no resonance effects O donating O withdrawing O donating withdrawing O no inductive effects Ono resonance effects O electron-rich electron-deficient O similar to benzene O electron-rich O electron-deficient O similar to benzene olo 18 Ar 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilityarrow_forwardRank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check Х (Choose one) OH (Choose one) OCH3 (Choose one) OH (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Centerarrow_forwardAssign R or S to all the chiral centers in each compound drawn below porat bg 9 Br Brarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY





