摘要
研究了不同温度下水溶液中Fe2（SO4）3与KI（Na2S2O3，淀粉）的反应速率．在15－29℃范围内，Fe2（SO4）3与KI（Na2S2O3，淀粉）的反应速率比相同条件下的Fe（NO3）3反应体系慢3-4倍．使用721-分光光度计测定了水溶液中Fe（Ⅲ）与SO42-离子形成配合物的配位比．结果表明，在PH=1．5及21℃时，存在Fe2（SO4）3的二聚体Fe4（SO4）6。
The reaction rate of Fe2(SO4)3, and KI (Na2S2O3. starch) in the aqueous solution has been studied at different temperature. Between the temperture 15℃ and 29℃,the reaction rate of Fe2(SO4)3 and KI (Na2S2O3, starch)is about 3-4 times slower than that of Fe(NO3)3 at the same conditions. The coordination ratio of Fe(Ⅲ)-SO42- coordination compound is determined by means of 721-spectrophotometer.The result shows tha the Fe4(SO4)6,the dimer of Fe2(SO4)3 exists in the solution at the condition of pH=1.5 and T=21℃.
出处
《河北建筑科技学院学报》
1999年第4期17-20,共4页
Journal of Hebei Institute of Architectural Science & Technology
