Fumaric acid (select) O than maleic acid, giving it a higher melting point. Maleic acid is (select) O than fumaric acid, giving it greater H2O solubility. In maleic acid, (select) O stabilizes the conjugate base after one H is removed, making maleic acid more acidic than fumaric acid. When removing the second H, pK2 is lower for fumaric acid than maleic acid because (select)
Fumaric acid (select) O than maleic acid, giving it a higher melting point. Maleic acid is (select) O than fumaric acid, giving it greater H2O solubility. In maleic acid, (select) O stabilizes the conjugate base after one H is removed, making maleic acid more acidic than fumaric acid. When removing the second H, pK2 is lower for fumaric acid than maleic acid because (select)
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...
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Transcribed Image Text:Be sure to answer all parts.
Recall that there is restricted rotation around carbon-carbon double bonds. Maleic acid and fumaric
acid are two isomers with vastly different physical properties and pK, values for loss of both protons.
Explain why each of these differences occurs.
он
Но
HO-
Но
maleic acid
fumaric acid
mp (°C)
solubility (g/L) in H2O at 25 °C
pKa1
pKa2
130
286
788
7
1.9
3.0
6.5
4.5
Fumaric acid
(select)
O than maleic acid, giving it a higher melting point.
Maleic acid is
(select)
O than fumaric acid, giving it greater H2O solubility.
In maleic acid, (select)
stabilizes the conjugate base after one H is removed,
making maleic acid more acidic than fumaric acid.
When removing the second H, pK22 is lower for fumaric acid than maleic acid because
(select)
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