Detailed Information on Publication Record
2000
Potentiometric study of Tungsten(VI) Complex Formation with Tartarate
LUBAL, Přemysl, Jiří PERŮTKA and Josef HAVELBasic information
Original name
Potentiometric study of Tungsten(VI) Complex Formation with Tartarate
Authors
LUBAL, Přemysl, Jiří PERŮTKA and Josef HAVEL
Edition
Chem. Papers, Bratislava, Slovak Republic, Slovak Academy of Science, 2000, 0366-6352
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10406 Analytical chemistry
Country of publisher
Slovakia
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 0.154
RIV identification code
RIV/00216224:14310/00:00002916
Organization unit
Faculty of Science
Keywords in English
Complex equilibria; chemical model determination; tungstate; tartaric acid
Změněno: 22/2/2001 11:22, prof. RNDr. Přemysl Lubal, Ph.D.
Abstract
V originále
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.
Links
| MSM 143100011, plan (intention) |
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