|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
Anion-specific effects on activity coefficients in aqueous solutions of sodium salts: Modeling with the extended Debye–Hückel theoryстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2019 г.
- Авторы: Shilov I.Yu, Lyashchenko A.K.
- Журнал: Journal of Solution Chemistry
- Том: 48
- Номер: 2
- Год издания: 2019
- Издательство: Kluwer Academic/Plenum Publishers
- Местоположение издательства: United States
- Первая страница: 234
- Последняя страница: 247
- DOI: 10.1007/s10953-019-00860-8
- Аннотация: The extended Debye–Hückel theory, which allows for concentration variation of electro- lyte solution static permittivity, is employed to predict activity coefficients in aqueous solu- tions of sodium salts with various univalent anions (NaCl, NaBr, NaI, NaNO 3 , NaClO 4 and NaSCN) at ambient conditions. Calculations without empirical adjustments reproduced the activity coefficients for NaI in the concentration range up to 6 mol·kg −1 and for NaSCN up to 2 mol·kg −1 . In the case of other solutions, calculations underestimate water activ- ity coefficients and overestimate mean ionic activity coefficients at concentrations beyond 0.5 mol·kg −1 . In order to improve the representations, the model was extended to include ion pairing, which resulted in a better agreement between calculated activity coefficients and experimental data, especially for NaNO 3 . The ion pairing equilibrium constants were estimated and compared with available literature values. The extent of ion pairing was found to increase in the sequence NaI < NaSCN < NaBr < NaCl < NaClO 4 < NaNO 3 , with violation of the Collins rule in the case of polyatomic oxygen-containing anions.
- Добавил в систему: Шилов Игнат Юрьевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|