STUDIES IN THE COMPOSITION OF FERRIC ARSENITE AND FERROUS ARSENATE. PART I. QUALITATIVE STUDY OF THE REACTION BETWEEN FERRIC CHLORIDE AND SODIUM ARSENITE

By reacting ferric chloride with sodium arsenite in aqueous and neutralised and acidified solutions interesting evidences have been obtained of intermediate reactions between the reactants The most important factors which govern the composition of ferric arsenite are (i) the oxidation-reduction phenomenon between the reactants, (ii) H-ion concentration of the system, (iii) hydrolytic character of the compound, and (iv) the phenomenon of adsorption.