如何从溶液中得到固体产物是化学工作者时常都要遇到的问题,针对物质的不同性质(包括溶解性、水解倾向、稳定性)而采取不同策略,这其中凝结了人类太多的智慧。在近几年的高考中,命题人则把这些凝聚着前人智慧的处理问题的方法设计成一个个精彩的问题,来考查学生分析问题、解决问题的能力。一、沉淀法沉淀法作为一种最为快捷、简便的方法,从学生刚开始接触化学便如影随形,粗盐的提纯更是学生进入高中之后所遇到的第一个精彩大戏,人们在药品滴加顺序 How to get solid product from solution is a common problem for chemical workers. Different strategies are taken according to the different properties of substances (including solubility, tendency to hydrolysis, stability), which sets too much human wisdom. In recent years, college entrance examination, the Proposition put these condensed together with the wisdom of the predecessors to deal with the problem of designing a wonderful question, to examine students’ ability to analyze and solve problems. First, precipitation precipitation method as one of the most efficient and easy way, from the beginning of the student exposure to chemistry go hand in hand, the purification of crude salt is the first wonderful drama students encounter after entering high school, people drop in the drug order