胶体性质实验的综合设计与实践  

Discussion and Practice on the Colloidal Properties Experiment of Iron Hydroxide

作　　者：熊辉[1] 梅付名[1] 王宏伟[1] 莫婉玲[1] 周锦兰[1] 李涛[1] 

机构地区：[1]华中科技大学化学与化工学院,武汉430074

出　　处：《实验科学与技术》2015年第1期21-24,66,共5页Experiment Science and Technology

摘　　要：对物理化学实验中所用Fe(OH)3胶体的制备及纯化方法等问题进行了详细、深入的探讨,介绍了该实验的测定方法和测定结果。以尿素络合水解法制取氢氧化铁胶体,采用透析袋对其纯化,选择与胶体相同电导率的氯化钾及盐酸混合溶液作辅助液,能较好地解决传统实验中过程学生操作烦琐、电动电势值测定不准确等问题。The preparation and purification in the experiment of Fe（ OH）3colloid electrophoresis had been discussed in detail. This experimental determination method was introduced and the result as： iron hydroxide colloid was prepared with iron chloride and urea by the fast hydrolysis. Then,we used the dialysis bag to purify colloid. HCl ＋ KCl mixture solution with the same conductivity of colloid had been chosen. ζ- potential values were obtained accurately and repeatable,this method was simple and also suitable for students.

关 键 词：Fe(OH)3胶体 电泳 制备 纯化 电动电势 

分 类 号：TQ352.7[化学工程] G642.423[文化科学—高等教育学]