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Precipitation of Strontium Sulphate in Aqueous and Mixed Media of Different Dielectric Constants

M. Slovenc ; Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia
B. Težak ; Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia, Yugoslavia


Puni tekst: engleski pdf 6.269 Kb

str. 15-20

preuzimanja: 40

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Sažetak

The influence of ethanol on the precipitation of strontium sulphate
was [nvestigated in aqueous solutions in statu nascendi. Sol
formation and kinetics of precipitation were investigated by the
tyndaUometric technique, as well as by the electrophoresis method
(determination of the charge sign by means of an ultramicroscope),
and by measuring pH values. The results of investigations are given
in from of general precipitation diagrams. Concentrational regiO'Ils
as well as concentration ratio of Na2S04 to Sr(N03h of precipitation/
non precipitation Limits show the limited area where the constant
donic product may be applied. Outside of this area there is
presumably a formation of ionic associates. Lowering of the dielectric
constant and increase of the ethanol content results in (1) decrease
of solubility of solid phase and (2) change in kinetics of precipitation.

Ključne riječi

Hrčak ID:

207968

URI

https://hrcak.srce.hr/207968

Posjeta: 100 *