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@article{350572,
author = {Lubal, Přemysl and Perůtka, Jiří and Havel, Josef},
article_location = {Bratislava, Slovak Republic},
article_number = {5},
keywords = {Complex equilibria; chemical model determination; tungstate; tartaric acid},
language = {eng},
issn = {0366-6352},
journal = {Chem. Papers},
title = {Potentiometric study of Tungsten(VI) Complex Formation with Tartarate},
volume = {54},
year = {2000}
}
TY - JOUR
ID - 350572
AU - Lubal, Přemysl - Perůtka, Jiří - Havel, Josef
PY - 2000
TI - Potentiometric study of Tungsten(VI) Complex Formation with Tartarate
JF - Chem. Papers
VL - 54
IS - 5
SP - 289
EP - 289
PB - Slovak Academy of Science
SN - 03666352
KW - Complex equilibria
KW - chemical model determination
KW - tungstate
KW - tartaric acid
N2 - Complexation of tungstate with tartarate has been investigated by potentiometry in the pH range 2,5-7,5 in 1 M KNO3. The experimental data were evaluated with ESAB (for the calculation of protonation constants of tartarate) and OPIUM (for the formation constants of complexes) computer programs. A high number of chemical models including polynuclear complexes were considered and tested on a computer. The final model comprises five complexes that have a tungsten(VI):tartarate ratio 2:2 and 1:2. The following formation constants (Beta_pqr)were calculated: log Beta(212) = 16.6 +/- 0.1, log Beta(312) = 20.4 +/- 0.2, log Beta(412) = 23.9 +/- 0.1, log Beta(322) = 26.68 +/- 0.08, and log Beta(422) = 30.7 +/- 0.1, where p, q, r refer to stoichiometric coefficients in general formula (H)p(WO4)q(C4H4O6)r p-2q-2r. Structures of the complexes were proposed.
ER -
LUBAL, Přemysl, Jiří PERŮTKA a Josef HAVEL. Potentiometric study of Tungsten(VI) Complex Formation with Tartarate. \textit{Chem. Papers}. Bratislava, Slovak Republic: Slovak Academy of Science, 2000, roč.~54, č.~5, s.~289-295. ISSN~0366-6352.
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