Original scientific paper

Methorics of Coagulation Processes. XIII. Systematic Comparison of Coagulation Values for Various Cationson Negative Silver Halogenide Sols*

E. Matijević ; Laboratory of Physical Chemistry, Faculty of Science, University, Zagreb, Croatia, Yugoslavia
K. F. Shulz ; Laboratory of Physical Chemistry, Faculty of Science, University, Zagreb, Croatia, Yugoslavia
B. Težak ; Laboratory of Physical Chemistry, Faculty of Science, University, Zagreb, Croatia, Yugoslavia

Abstract

The results on coagulating effects of the following electrolytes are reported: on negative silver bromide sol: HNO3, LiNO3, NaNO3, KNO3, H2S04, Li2SO4, Na2SO4, K2S04, Mg(NOAl2, Mn(N03)2, Ca(NO3)2,Sr(NO3)2, Ba(NO3)2, MgSO4, MnSO4, CaSO4, Al(NO3)3, Ce(NO3)3, La(NO3)2; on negative silver iodide sol: LiNO3, NaNO3, KNO3,H2SO4, Li2SO4, Na2SO4, K2SO4, Mg(NO3)2, Mn(NO3)2, Ca(NO3)2, Sr(NOa3)2, Ba(NO3)2, MgSO4 , MnSO4, CaSO4, Al(NO3)3, La(NO3)2 and Al2(S04)3; on negative silver chloride sol: KNO3, Mg(N03), Ca(NO3)2, Sr(NO3)2, Ba(NO3)2, MgS04, CaSO4, Al(N03)3, and La(NO3)3 . As shown earlier a linear relationship exists between the crystallographic radii of the counterions of the same valency and the logarithms of the corresponding coagulation values; the characteristic coagulation values obtained when extrapolating the straight lines of the preceding plots to the zero radius were used for testing the validity of expression for quantitative interpretation of the Schulze- Hardy rule. The equations which follow from the theories of Freundlich and Verwey and Overbeek did not fit the experimental observations, while the equations of Whetham and Tefak showed quite a good agreement.

Keywords

Hrčak ID:

247066

URI

https://hrcak.srce.hr/247066

Publication date:

15.7.1956.

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