Concept explainers
(a)
Interpretation:
The first and second ionization equations of succinic acid with their
Concept introduction:
(b)
Interpretation:
The reason as to why the
Concept introduction:
Carboxylic acid is a class of organic compound that contains a
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Chapter 20 Solutions
EBK ORGANIC CHEMISTRY
- 2,4-Pentanedione is a considerably stronger acid than is acetone (Chapter 19). Write a structural formula for the conjugate base of each acid and account for the greater stability of the conjugate base from 2,4-pentanedione.arrow_forwardWhat is the predominant form of A–A–A at pH = 1?arrow_forwardWhat is the pOH of:(a) a 0.0100 F solution of phtalic acid?(b) a 0.0100 F solution of monopotassium phtalate? (c) a 0.0100 F solution of dipotassium phtalate?if pKa1 = 2.950 and pKa2 = 5.408 for phtalic acidarrow_forward
- Predict the stronger acid in each pair: (a) HNO3 or HNO2;(b) H2S or H2O; (c) H2SO4 or H2SeO4; (d) CH3COOH or CCl3COOH.arrow_forwardThe Brønsted-Lowry definition of acids and bases is: Acids are proton donors, bases are proton acceptors Acids are nucleophiles and bases are electrophiles Acids are proton acceptors, bases are proton donors Carboxy groups are acids and amine groups are bases Carboxy groups are electrophiles and amine groups are nucelophilesarrow_forwardWhat is the pKa of benzoic acid? What is the molar concentration of sodium benzoate (conjugate base)? What is the molar concentration of benzoic acid (weak acid)?arrow_forward
- но HO но он The pK, of ascorbic acid (vitamin C) is 4.17, showing that it is slightly more acidic than acetic acid (CH3CO0H, pKa 4.74). (a) Show the fou r different conjugate bases that would be formed by deprotonation of the four different OH groups in ascorbic acid. (b) Compare the stabilities of these four conjugate bases, and predict which OH group of ascorbic acid is the most acidic. (c) Compare the most stable conjugate base of ascorbic acid with the conjugate base of acetic acid, and suggest why these two compounds have similar acidities, even though ascorbic acid lacks the carboxylic acid (COOH) group.arrow_forwardHydroxide (-OH) can react as a Brønsted–Lowry base (and remove a proton), or a Lewis base (and attack a carbon atom). (a) What organic product is formed when -OH reacts with the carbocation (CH3)3C+ as a Brønsted–Lowry base? (b) What organic product is formed when -OH reacts with (CH3)3C+ as a Lewis base?arrow_forwardCompare the pH of propionic acid and nitric acid when they are dissolved in water at a concentration of 20 mM. This should include writing a balanced equation describing the acid-base reactions involved, calculation of the pKa for both, calculation of pH, and calculation of the percent dissociation of both.arrow_forward
- The pKa of ascorbic acid (vitamin C, page 55) is 4.17, showing that it is slightly more acidic than acetic acid (CH3COOH, pKa 4.74). Compare the most stable conjugate base of ascorbic acid with the conjugate base of acetic acid, and suggest why these two compounds have similar acidities, even though ascorbic acid lacks the carboxylic acid (COOH) group.arrow_forwardAlcohols are weak organic acids, pKa 15–18. The pKa of ethanol, CH3CH2OH, is 15.9. Write equations for the equilibrium reactions of ethanol with each base. Which equilibria lie considerably toward the right? Which lie considerably toward the left? Q.) NaOHarrow_forwardAcid-Base Equilibria Many factors contribute to the acidity of organic compounds. Electronegativity, resonance, induction, hybridization, aromaticity, and atomic size, all play a role. In the following comparisons, you are asked to identify the factor(s) that would be most important to analyze when predicting relative acidity, and then to predict the trend in acidity and pKa values. For each of the following pairs of compounds answer the following two multiple-choice questions. 1. What factor(s) are the most important to consider when predicting the relative acidity of the two compounds? a. Electronegativity of the atom possessing the hydrogen. b. Resonance stabilization of the anionic conjugate base. c. Inductive stabilization of the anionic conjugate base. d. Hybridization of the atom possessing the hydrogen. e. The atomic size of the atom possessing the hydrogen.arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning