EDTA is a hexaprotic system with the pK, values: Fooc-CH2 H,C-coo pKal = 0.00, pK2 = 1.50, pKas = 2.00, pK4 = 2.69, N-CH2-CH2-N: pKus = 6.13, and pKu6 = 10.37. The distribution of the various protonated forms of EDTA "ooc-CH, H,C-coo EDTA (or Y4-) will therefore vary with pH. For equilibrium calculations involving metal complexes with EDTA, it is convenient to calculate the fraction of EDTA that is in the completely unprotonated form, Y*-. This fraction is designated ay4-. Calculate ayt- at two pH values. pH = 3.70 ay4- = pH = 10.45 ay4- =

EDTA is a hexaprotic system with the pK, values: Fooc-CH2 H,C-coo pKal = 0.00, pK2 = 1.50, pKas = 2.00, pK4 = 2.69, N-CH2-CH2-N: pKus = 6.13, and pKu6 = 10.37. The distribution of the various protonated forms of EDTA "ooc-CH, H,C-coo EDTA (or Y4-) will therefore vary with pH. For equilibrium calculations involving metal complexes with EDTA, it is convenient to calculate the fraction of EDTA that is in the completely unprotonated form, Y*-. This fraction is designated ay4-. Calculate ayt- at two pH values. pH = 3.70 ay4- = pH = 10.45 ay4- =

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter19: Carboxylic Anhydrides, Esters, And Amides

Section: Chapter Questions

Problem 19.6P

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