进行高中化学第二册第二章《氮族》[实验2—3]时,铂丝继续保持红热现象易于实现,但欲使锥形瓶中产生明显的棕色气体,则很难办到。对此,我们通过反复实验,对氨水的浓度、催化剂及干燥剂的选择、装置的合理性进行了较系统的探讨。现分述如下。 When the “Nitrogen” [Experiment 2-3] of the second chapter of the High School Chemistry Book 2 was performed, the platinum wire continued to maintain the red heat phenomenon, but it was difficult to achieve the obvious brown gas in the Erlenmeyer flask. In this regard, through repeated experiments, we systematically discussed the concentration of ammonia, the choice of catalyst and desiccant, and the rationality of the device. The breakdown is as follows.