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氨的制取及性质实验是人教版化学必修1第四章第四节中的重要内容。它包括氨的实验室制法(2NH_4Cl+Ca(OH)_2■CaCl_2+2H_2O+2NH_3↑),氨气极易溶于水,氨水加热易分解,氨气呈弱碱性,氨气与酸反应等内容。一、实验不足笔者按照教科书上的实验装置和步骤来做,发现实验存在着以下不足。1.用加热铵盐和固体碱的方法来制取氨,量小且难以收集,满足不了实验所需。因此,在实际教学中
The preparation and characterization of ammonia is an important part of the fourth chapter of Chapter 4 of the PEP 1. It includes ammonia laboratory preparation method (2NH_4Cl + Ca (OH) _2 ■ CaCl_2 + 2H_2O + 2NH_3 ↑), ammonia easily soluble in water, ammonia is easy to decompose by heating, ammonia is weakly alkaline, ammonia and acid reaction And so on. First, the lack of experiments I follow the textbooks on the experimental setup and steps to do and found that the existence of the following shortcomings. 1. Ammonia and solid base heating method to obtain ammonia, small and difficult to collect, can not meet the experimental needs. Therefore, in the actual teaching