| Autor: |
MIRJANA V. OBRADOVIC, SLAVICA M. SUNARIC, SNEZANA S. MITIC, DRAGAN S. VESELINOVIC |
| Jazyk: |
angličtina |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Journal of the Serbian Chemical Society, Vol 73, Iss 11, Pp 1113-1122 (2008) |
| Druh dokumentu: |
article |
| ISSN: |
0352-5139 |
| Popis: |
The reaction between NaAsO2 and oxalic acid was studied by pH-metric and conductometric measurements, applying the methods of continual variation and pH-metric and conductometric titration. It was found that oxalic acid forms a complex anion of the type [AsOC2O4]-. The relative stability constant of the complex at ionic strengths, I, of 0.10 (log Kr = 4.70), 0.20 (log Kr = 4.51), 0.50 (log Kr = 4.24) and 0 (log K0r = 5.05) and thermodynamic para¬meters were calculated using the data obtained by pH-metric measurements at 25.0±0.1 °C (DH = 10.5 kJ mol-1, DG = –29.0 kJ mol-1, DS = 133 J mol-1 K-1). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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