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高中的化学计算题经常出现源于课本又高于课本、活于课本的试题.追根溯源,这些计算题是由课本中某些知识点和计算方法发散而来,计算方法各异,若想在计算题上不丢分,光会算是不够的,关键要快、准,思维开阔,方法灵活多变.下面通过两道典型例题来探讨一下化学计算中的一题多解现象.例1 28g铁粉全部溶于稀硝酸中,放出NO气体后得到溶液的体积是1L,将反应后的溶液放在天平上称量,发现质量比原硝酸溶液增重16g,求所得溶液中金属阳离
High school chemistry problems often appear from the textbook is higher than the textbook, live in the textbook questions. Tracing the source, these questions are calculated from textbooks and some knowledge points diverge from the calculation methods vary, if you want to Calculation of the title is not lost points, the light will be considered not enough, the key should be fast, accurate, open-minded, flexible approach. The following two typical examples to explore the chemical calculation of a phenomenon of multiple solutions .Example 1 28g iron Powder all dissolved in dilute nitric acid, NO gas released after the solution volume is 1L, the reaction solution was weighed on the balance and found that the quality of weight than the original nitric acid solution weight 16g, the resulting solution of metal cation