The determination and temperature-dependence of the stability constant of the calcium—catechol-4-sulfonate complex in alkaline aqueous media
| Autor: | Harvey H. Westervelt, Dwight B. Easty, Earl W. Malcolm, W.J. Frederick |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Potassium Inorganic chemistry Salt (chemistry) chemistry.chemical_element Calcium Biochemistry Analytical Chemistry chemistry.chemical_compound Sulfonate chemistry Stability constants of complexes Ionic strength Environmental Chemistry Spectroscopy Stoichiometry |
| Zdroj: | Analytica Chimica Acta. 138:237-243 |
| ISSN: | 0003-2670 |
| Popis: | The complex which forms between calcium and the potassium salt of catechol-4-sulfonate in aqueous, alkaline solutions at temperatures from 5 to 80°C was studied. The measurement techniques involved the use of ultraviolet spectrophotometry and a calcium ion-selective electrode. Results indicate that a single complex species with a 1:1 stoichiometry forms between calcium and the totally dissociated potassium catechol-4-sulfonate. The logarithm of the stability constant of the complex is 3.82 ± 0.04 (0.92 M ionic strength) throughout the temperature range. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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