6.33 X10-13 EDTA is a hexaprotic system with the pK, values: pKal = 0.00, pK2 1.50, pK = 2.00, pKt = 2.69, %3D %3D pKas = 6.13, and pK6 10.37. %3D The distribution of the various protonated forms of EDTA 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 aya. Calculate ayt at two pH values. pH = 3.15 dy= Incorrect 0.1327 pH = 10.55 ayt %3D %3D

6.33 X10-13 EDTA is a hexaprotic system with the pK, values: pKal = 0.00, pK2 1.50, pK = 2.00, pKt = 2.69, %3D %3D pKas = 6.13, and pK6 10.37. %3D The distribution of the various protonated forms of EDTA 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 aya. Calculate ayt at two pH values. pH = 3.15 dy= Incorrect 0.1327 pH = 10.55 ayt %3D %3D

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 19.24P

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EDTA is a hexaprotic system with the pK, values: -ooc-CH2 H2C-coo pKal = 0.00, pKa2 = 1.50, pKa3 = 2.00, pK4 = 2.69, :N-CH2-CH2-N: pKas = 6.13, and pKa6 = 10.37. "ooc-CH2 H,C-coo The distribution of the various protonated forms of EDTA 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 ayt-, Calculate ayt- at two pH values. pH = 3.70 ayt- = pH = 10.45 ay4- =
EDTA is a hexaprotic system with the pKa values: -OOC-CH2 H2C-COO pKal = 0.00, pK2 = 1.50, pK3 = 2.00, pK4 = 2.69, :N-CH2-CH2-N: pKa5 = 6.13, and pKa6 10.37. OOC-CH2 H2C-COO The distribution of the various protonated forms of EDTA 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 ays-. Calculate ayt- at two pH values. 4.41 pH = 3.60 Incorrect 8.25 pH 10.80
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