Original scientific paper

Heterogeneous Exchange of Precipitates. XII. AgCl - Ag+ and AgCl -Cl-Exchange

M . Vlatković ; Laboratory of Radiochemistry, Institute »Ruder Boskovic«, Zagreb and Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia
M. Mirnik ; Laboratory of Radiochemistry, Institute »Ruder Boskovic«, Zagreb and Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia
R. Despotović ; Laboratory of Radiochemistry, Institute »Ruder Boskovic«, Zagreb and Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia

Abstract

The influence of aging of AgCl precipitate and the change
of e l ectrolyte concentrations of liquid phase upon the course of
h e t erogeneous AgCl-Ag+ and AgCl-Cl- exchange has bee n investigated
by means of radionuclides 110Ag and :wc1.
In AgCl-Ag+ systems it has bee n found that the rate of
exchange decreases with the increase of Ag + concen tration and
by aging of AgCl (for 10 to 10,000 minutes) in the mother liquor.
The influence of La(N0a)3 concentration upon the course of exchange
during the formation of AgCl was followed in AgC1-c1-
systems. The results reveal that the exchange rate is also reduced by
aging of AgCl precipitate. Also it was found that in the range of
concentration: 1.0 X 10- 4 to 1.0 X 10- 2 N La(N03 )a the rate of exchange increases with the La(N03)a concentration, and from 1.0 X 10-2 to 1.0 N is reduced.
The results reveal that the kine tics of the he teroge neous
AgCl-Ag+ and AgCl- Cl- exchanges d e p end on age of the precipitate,
conce ntrations of the constituent and the coagulating ions
and that the change of the liquid phase on a formed system causes
the change of its properties.

Keywords

Hrčak ID:

208201

URI

https://hrcak.srce.hr/208201

Publication date:

31.3.1966.

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