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.

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.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

a) If the Kb of a weak base is 4.7E-9, what is the Ka of its conjugate acid? Do not include any units with your answer. Your answer should have two significant figures. For scientific notation use the same as that in the problem (i.e. 3.3E-2 is the same as 3.3 x 10-2). b) Diethylamine, (CH3CH2)2NH, has a Kb of 8.6 x 10-4. What is the pH of a 0.22 M solution of diethylammonium chloride, [(CH3CH2)2NH2]Cl? Your answer should be to two places past the decimal point.
If HSO4- acts as an acid, what would be the conjugate base?
None
3.27 For each pair of structures below, identify the stronger acid, and explain your choice: H H N=H -N H H H (a) (c) H -" :0 H ΝΞΗ I H ΗΘΗ `N' H CONTA ΘΝ H (b) (d) H H H N H I H
Give the formula of the conjugate acide of H2O ?
The Keq for the reaction: A + B ↔ AB is 2.03 What is the Keq for AB ↔ A + B Keq = ?
The following equation shows the equilibrium in an aqueous solution of methylamine: CH3NH2 (aq) + H2O(1) = CH3NH3*(aq) + OH¯ (aq) Which of the following represents a conjugate acid-base pair? • View Available Hint(s) CH3NH2 and H2O CH3NH3+ and OH- O H20 and OH- O CH3NH2 and OH-
For an acid with a pKa of 5.00, what is the pKb of its conjugate base?
a) b) What is the conjugate acid of NH3? What is the conjugate base of H2O?
Consider the following equilibrium between pentanoic acid and its conjugate base: | CH3CH,CH,CH2C0- H20 + H30+ CH;CH2CH,CH,C-OH Will lowering the pH shift the equilibrium to the right or to the left?