Original scientific paper

Heterogeneous Exchange of Amalgams. I. Zn-Amalgam-Zn2+(S042- ) Solution Exchange

A. Filip ; Institute »Boris Kidric«, Belgrade, Serbia and Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia
M. Mirnik ; Institute »Boris Kidric«, Belgrade, Serbia and Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia

Abstract

The exchange between zinc ions in solution and zinc in
amalgam h as b een investigated by the technique of radioactive
indicators. It was found that there is a dependence between the
exchange rate and content of zinc in solution, for a constant content
of zinc in amalgam, of the form:
log R = a + b log nL
The coefficients a and b were determined by the l east squares
method for 3.5 X 10-4 and 7 X 10- 4 g atom of zinc in amalgam. The
value of coeffici ent b close to unity, w hich is obtained for low
concentration of zinc ions with 7 X 10- 4 g atoms zinc in amalgam,
indicates that diffusion of zinc ions through the interface solutionamalgam is the slowest proce:;:s. For the region of amalgam concentrations with n s h igher than 7 X 10- 4 g atom of zinc it may be
concluded that th e exchange rate do es not depend on the zinc
concentration in the amalgam.

Keywords

Hrčak ID:

208199

URI

https://hrcak.srce.hr/208199

Publication date:

31.3.1966.

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