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Some Properties of AgI Suspensions Formed by the Dilution Method

R. Despotović ; »Ruder Boskovic« Institute, 41000 Zagreb, Croatia, Yugoslavia
V. Karaivanova ; »Prof. Assen Zlatarov« High School of Chemical Technology, Burgas, Bulgaria

Puni tekst: engleski pdf 5.256 Kb

str. 215-220

preuzimanja: 168



The complex solution of Ag! in concentrated KI was added to
water or to diluted KI solution to give pl = 2 in the final system.
Time tyndallograms (obtained by measuring turbidity as a function
of time) of the Ag! sols thus obtained were analysed. By a radiometric
technique adsorption-desorption equilibria in the systems
thus obtained were determined. The results show that sols with a smaller degree of dispersion than sols in statu nascendi (by mixing precipitation components) formed under the same final chemical conditions (pl = 2) were obtained. The colloid particles grow faster and the process of the particles growth is the fastest after the mixing of the precipitation components. The measurement of the adsorption capacity
(meq/gram) gave an equilibrium value which is one tenth of the
capacity of sols obtained in statu nascendi. The mode of mixing
reaction components also markedly influences the stability and
the growth of Ag! sol particles.

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