Pulse radiolysis study of silver chloride formation and precipitation

R. Schiller, M. Ebert

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Stable ions were formed by a 1μs pulse of high-energy electrons. Reactions and precipitate formation of these ions were followed. The formation kinetics of the AgCl2-complex were studied by irradiating aqueous chloroacetic acid plus silver acetate solutions of appropriate concentrations. The observations were in agreement with a consecutive reversible mechanism of the form Ag++Cl-⇋AgCl; AgCl+Cl-⇋AgCl2- where the first stage represented a pre-equilibrium to the second one and the forward and reverse rate constants of the second stage were (4·1 ± 0·1) × 108 1 mol-1 s-1 and (4·7 ± 0·12) × 106 1 mol-1 s-1, respectively. Some indications of the formation of a silver organic compound were observed. The period of incubation before precipitate formation t0 was determined. This obeyed the general rule log t0 = -n log c + const. where c̄ is the geometrical mean of the initial ion concentration, and n = 8·9 ± 0·5 was found. Similar studies of the iodoacetic acid plus silver acetate system indicated the formation of the complex AgI2-.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalInternational Journal for Radiation Physics and Chemistry
Issue number2
Publication statusPublished - Apr 1969

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