| Autor: |
Maeda, Masunobu, Hayashi, Masato, Ikeda, Shoichiro, Kinjo, Yoshiaki, Ito, Kaname |
| Zdroj: |
Bulletin of the Chemical Society of Japan; June 1987, Vol. 60 Issue: 6 p2047-2052, 6p |
| Abstrakt: |
The dissociation constants of ammonium ion were determined at 25°C by potentiometry with glass and ammonium-ion-selective electrodes in artificial seawaters at various salinities (25–45\ extperthousand) and in concentrated sodium chloride aqueous solutions (0.72–3.2 mol kg−1). The activity coefficients of ammonia in sodium chloride solutions of the same ionic strengths as those of the artificial seawaters and in the concentrated sodium chloride solutions, which were used for the theoretical estimation of the dissociation constants, were measured by a transpiration method. The dissociation constants were theoretically evaluated in terms of the ionic interaction model developed by Pitzer and co-workers, and compared with the experimental ones. The predicted dissociation constants showed a good agreement with the observed ones. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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