Studies of Ion Transfer Across Iamiscible Electrolyte Solutions
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Date
1983-06
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Addis Ababa Universty
Abstract
The transfer of ions across the \water/acetophenone
interface has been investigated by ac cyclic voltammetry.
The reversibility of the ion transfer at low sweep rates,
as well as precise half-wave potential values have been
determined from the observed ac cyclic voltammograms.
The reversibility of the ion transfer across the water/
acetophenone interface at 10Vi sweep rates has also been
further eetablished by using the dc cyclic voltammetric
technique. Values of standard Gibbs energies of transfer
from water to acetophenone for several ions have
been evaluated. These have been compared with theoretically
calculated values for this system.
Such studies of ion transfer have been extended
for the Vlater/nitrobenzene and water/chlorobenzene-nitrobenzene
mixture systems using dc cyclic voltammetry.
The values of the standard Gibbs energies of transfer
for many ions obtained in these systems have been
compared with theoretically estimated values. The
present experimental results for the water/nitrobenzene
system are in very good agreement with those calculated
from partition (extraction) experiments by other
workers. Attempts have also been made to correlate
standard Gibbs energies of transfer with the dielectric
constants of the organic mixtures.
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ions