On the interaction of metal-ions during mutual hydrolysis and coprecipitation with metal hydroxides

Results of radiochemical and spectrophotometric studies of coprecipitation of hydrolytes are presented. Coprecipitation of 1μg of Cr(3) with hydroxides of Sn(4), Fe(3), Th, Be, Cd and Mg was studied. The interaction of partially hydrolyzed metal-ions proceeds with the formation of bridge bonds through mutual hydroxyls. Metal ions with less obvious acid properties in the given conditions act as a donor of hydroxyls, and, vice versa, ions of another metal posessing more vivid acid properties may be their acceptor. Hydrolysis of ions with the increasing of pA up to the formation of neutral hydrolysis forms promotes the formation of bridge bonds between interacting metal-ions, hydroxyls of the inner sphere of hydroxocomplexes of the both metals taking part in it