Аннотация:Abstract The reactions of the photochemically-produced electron, e−aq, in an aqueous solution of hexacyanoferrate(II) were studied when H2PO4−, NO3−, H2O2, CO2, [Fe(CN)6]3− and H3BO3 were used as the solute. The relative reaction rates, obtained by competition kinetics, are compared with those calculated using the published data on the absolute rate constants. The agreements are satisfactory in some cases, but not in other cases (e.g., H2PO4−, H2O2 and CO2), for which a possible explanation is given. This explanation includes the postulation of an electrontransfer reaction between the solutes employed; it is shown that information on the efficiency of this electrontransfer reaction may be obtained by using the relative rates obtained both from competition kinetics and from pulse radiolysis.