Extraction of silver into nitrobenzene using cesium dicarbollylcobaltate in the presence of 18-crown-6 |
| |
| Authors: | E Makrlík P Vaňura |
| |
| Institution: | (1) Institute of Physical Engineering, University of West Bohemia, Veleslavínova 11, 301 14 Pilsen, Czech Republic;(2) Department of Analytical Chemistry, Prague Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic |
| |
| Abstract: | From several cesium distribution experiments with 134 Cs tracer, the exchange extraction constant corresponding to the equilibrium Ag+ (aq)+CsL+ (nb) AgL+ (nb)+Cs+ (aq) in the two-phase water-nitrobenzene system (L = 18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) was determined as log K
ex (Ag+ ,CsL+ ) = -0.6±0.1. Furthermore, the stability constant of the silver — 18-crown-6 complex in nitrobenzene saturated with water was evaluated for a temperature of 25 °C: log  nb (AgL+ ) = 8.2±0.1. Finally, the individual extraction constant of the species AgL+ in the water-nitrobenzene system corresponding to the equilibrium AgL+ (aq)AgL+ (nb) was calculated: K
AgL+
= O1.2±0.1. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
