Some equilibrium constants of tellurous acid |
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| Affiliation: | 1. Indiana University School of Nursing, 600 Barnhill Drive, Indianapolis, IN 46202, United States;2. Indiana University School of Nursing, Indianapolis, IN, United States;1. Université de Paris, Institut de Physique du Globe de Paris, CNRS, F75005 Paris, France;2. Observatoire Volcanologique et Sismologique de Guadeloupe, Institut de Physique du Globe de Paris, F97113 Gourbeyre, France;3. CNRS, IRD, OPCG Laboratoire Magmas et Volcans, Université Clermont Auvergne, F63000 Clermont-Ferrand, France |
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| Abstract: | ![]()
The various literature values of the equilibrium constants for the system TeO32−H+ are tabulated, and the wide divergence in the values is noted. Solubility measurements and potentiometric titrations were used to re-evaluate some of the constants. The determinations were made in aqueous solutions, and at a range of ionic strengths (sodium perchlorate). The values found for aqueous solution, with no perchlorate, were as follows: pKHLH = 9·56 ± 0·02, pKH2LH = 6·08 ± 0·06, pKH3LH = 2·8 ± 0·2. There was no evidence of polynuclear species at concentrations below 0·05 M. |
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