Question: ooc-CH2 EDTA is a hexaprotic system with the pK values: 2.00, pKa4 = 2.69, H2C-Coo pKal = 0.00, pKa2 = 1.50, pK23 N-CH2-CH2-N: %3D

"ooc-CH2 EDTA is a hexaprotic system with the pK values: 2.00, pKa4

"ooc-CH2 EDTA is a hexaprotic system with the pK values: 2.00, pKa4 = 2.69, H2C-Coo pKal = 0.00, pKa2 = 1.50, pK23 N-CH2-CH2-N: %3D %3D pKas = 6.13, and pKa6 10.37. %3| "oOC-CH2 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 aya- . Calculate ayt at two pH values. 7.1 x10-10 pH = 3.95 ayt = Incorrect pH = 10.50 dyt = 0.546

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