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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- =

Chemistry
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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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- =
Transcribed Image Text: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- =
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