DETERMINATION OF STABILITY CONSTANTS AND OPTIMAL SYNTHESIS CONDITIONS FOR THIOCYANATE COMPLEX OF FE (III)

In this paper the formation of thiocyanate complex of Fe(III) was studied. We proposed to determine the optimal formation condition into a synthesis from FeCl3 and KSCN mixture. Achieving of thiocyanate complex was favored by room temperature, pH 2 and a reaction time by minimum 50 minutes. It was recommended using of HCl for acidulation of reaction medium and it was indicated to avoid sulfuric acid and acetate acid. Stability constant recorded the highest value to pH 2 and decreasing at pH growth. The study was accomplished in 1-4 pH range.