COPRECIPITATION OF ANTIMONY(III OR V) WITH IRON(III) HYDROXIDE.

Abstract

The coprecipitation of antimony(III or V) with iron(III) hydroxide as a function of the pH in the range from 4 to 12 was studied in the presence of the chloride ion. Antimony(III) is coprecipitated more easily at any given pH values than antimony(V). The coprecipitation of antimony(III) is quantitative in the pH range from 4 to 10 and is not affected by the chloride ion. On the other hand, the coprecipitation of antimony(V) is affected not only by the pH range, but also by the chloride-ion concentration.