摘要
在对实验中选取的FeCl3、指示剂和pH传感器存在的问题进行理论和实验说明的基础上，明确应选择仅存在单纯水解平衡的溶液体系，且将水解平衡自身现象的变化应作为实验的判断依据。进而从生成气体、沉淀和溶液颜色变化3个角度对反应物的选取进行了理论分析，并选取常用的盐类代表物进行实验验证，提出Fe（NO3）3、Fe2（SO4）3、CuSO4及酸化后的SnCl2溶液适合作为高中探究“温度对盐类水解影响”的反应物。
This paper described problems of the FeCl3, indicator and pH detection in experiments from theoretical and experimental aspects. On this basis, this paper explicated that there existed the simple hydrolysis equilibrium, and the changes of hydrolysis equilibrium self phenomena should be used as the criterion. Through theoretical analysis from producing gas, sedimentation and color changes of solutions and experimental verification by selecting common salt representations, this paper proposed that Fe（NO3）3, Fe2（SO4）3、 CuSO4 and acidification SnCl2 solutions could be used as the reactants.
出处
《化学教育》
CAS
北大核心
2016年第23期68-72,共5页
Chinese Journal of Chemical Education
基金
中央高校基本科研业务费专项资金资助(2013YB14)
关键词
温度
盐类水解
反应物
实验设计
temperature
hydrolysis of salts
reactant
experiment design
