Dicarboxylic acids have two dissociation constants, one for the initial dissociation into a rnonoanion and onefor the second dissociation into a dianion . For oxalic acid, HO,C-CO,H, the first ionization constant haspKaj = 1.2 and the second ionization constant has pKaz = 4.2. Why is the second carboxyl group so much lessacidic than the first?

Acids are sour substances with pH values less than 7. Acids can donate their protons. There are two…

Dicarboxylic acids have two dissociation constants, one for the initial dissociation into a rnonoanion and one for the second dissociation into a dianion . For oxalic acid, HO2C-CO.H, the first ionization constant has pKaj = 1.2 and the second ionization constant has pKaz = 4.2. Why is the second carboxyl group so much less acidic than the first?

Dicarboxylic acids have two dissociation constants, one for the initial dissociation into a rnonoanion and one for the second dissociation into a dianion . For oxalic acid, HO2C-CO.H, the first ionization constant has pKaj = 1.2 and the second ionization constant has pKaz = 4.2. Why is the second carboxyl group so much less acidic than the first?

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter20: Carboxylic Acids And Nitriles

Section20.4: Substituent Effects On Acidity

Problem 7P: Dicarboxylic acids have two dissociation constants, one for the initial dissociation into a...

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