[Co(NH_3)_5Cl]Cl_2的制备及组成测定探讨

Discussing Several Problems on the Preparation of [Co(NH_3)_5Cl]Cl_2

研究了[Co(NH3)5Cl]Cl2的制备及组成测定.对学生实验中普遍存在的产品产率低、组成推断时内界氯的成分测不出、产品加热前后两次Co2+检验现象无明显区别等问题进行了探讨.分析了问题存在的原因,总结了实验成败关键,改进了制备方法,定量测定了[Co(NH3)5Cl]Cl2的组成.

Studies on the preparation and deduces the constitute about [ Co（ NH3 ）5 Cl ] Cl2. And at the same time,discusses some ubiquitous problems to students. For example, the low productrate, without getting the constitute of inner - bound chloric, the phenomenon of inspection on Co^2＋ is not evident when heat the product for twice. So we analyze the reason of problems and Summarize the key of succeed-fail in experiment and improve on the method of preparation.