用勒夏特列原理分析浓度对Fe^(3+)和SCN^-显色反应的影响

Analysis of Effect of Concentration on the Color Reaction of Fe^(3+) and SCN^- With Le Chatelier's Principle

Fe^(3+)和SCN^-的络合反应灵敏、颜色变化明显,考虑中学阶段教学的过渡性,侧重利用勒夏特列原理,从发生氧化还原反应、改变溶液的酸碱性、加入其他配位离子等3个角度分析浓度对该显色反应的影响。

The complexing reaction of Fe3＋ and SCN- was sensitive and the color change was obvious. Considering the transition of high school teaching, this paper focused on the use of Le Chatelier＇s principle, analyzed the effect of concentration on the color reaction from 3 aspects, such as redox reaction, changing the pH of solution, adding other coordination ions and so on.