三草酸合铁Ⅲ)酸钾的制备和组成分析探究.docVIP

《化学研究创新实验》论文 三草酸合铁(III)酸钾的制备和组成分析探究专业应用化学班级应用化学2010-1班姓名张鑫鑫小组成员 邬斌 王海洋 张鑫鑫 组长张鑫鑫中国矿业大学 2014.01.05 三草酸合铁(Ⅲ)酸钾的制备和组成分析探究 摘要 在三草酸合铁(Ⅲ)酸钾合成实验中，原实验操作步骤较笼统操作条件控制不严格，导致实验只能得到较少的产物，有些甚至无法得到晶体，或者得到白色晶体，实验的重现性也较差，本文对三草酸合铁(Ⅲ)酸钾合成的实验条件进行了深入探索，改善了实验结果的重现性，提高了产品的产率，获得了优化条件：(1) Fe(OH)3制备中水浴加热温度；（2）过量H2O2的去除时间；（3）KHC2O4溶解Fe(OH)3水浴温度；（4）KHC2O4溶液溶解Fe(OH)3的加入方式；（5）KHC2O4溶液用量；（6）晶体析出条件，优化后制备的产品呈大颗粒翠绿色晶体。为后续的高锰酸钾滴定、无机定性分析、电导率测定、磁化率测定、红外光谱测定、光敏性实验等分析实验打下了良好的基础。得到有关测定数据与理论值相吻合。 关键词：三草酸合铁(Ⅲ)酸钾；制备；组成分析；探究 Abstract The traditional experiment in the preparation of potassium ferrioxalate has some defects,such as cursory process and undemanding operation conditions.It causes the following problems.Firstly,we obtain limited yields.Secondly, sometimes noly get white crystals or ever nothing.Thirdly,the reproducibility of the expereiment is dissatisfying.The paper carries out the detailed analysis on the experimental conditions of synthesizing potassium ferrioxalate.and increases the yields and optimizes the results.Emerald grain crystals can be obtained at a high rate of yielda by: (1) the temperature during preparation?of Fe(OH)3; (2) the time to eliminate the remaining H2O2；（3）The solubolity temperature of Fe(OH)3；（4）the way of adding KHC2O4 into Fe(OH)3；（5）the consumption of KHC2O4 ;(6) the conditions of the crystal precipitation. We can obtain the emrald crystal grains in improved process. It could?lay?the?ground work?for Potassium Permanganate titration, ?inorganic qualitative analysis, the determination of electrical conductivity, the determination of magnetic susceptibility, infrared spectrum analysis, ?photosensitive?experiment?analysis and so on.?The results are identical with the theoretical figures. Keywords: potassium ferrioxalate; preparation; composition determination; experimental research目 录 摘 要··················································································· I ABSTRACT·············································································