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鲁科版化学1(必修)模块中第3章第2节自然界中的元素——氮的循环中,有关“硝酸的氧化性”的性质实验,教材中的实验设计如下:实验2在2支试管中各放入1小块铜片,分别加入少量稀HNO3(4mol/L)和浓HNO3(15mol/L),立即用蘸有NaOH溶液的棉花封住试管口,观察试管中发生的现象;再将上述实验中的金属铜换成金属铁进行相同的实验,观察发生的现象。经过课堂教学演示实验发现,在第一个实验操作过程中,试管内生成的NO气体常温下很快和
Luke Edition Chemistry 1 (compulsory) module Chapter 3, Section 2 Elements of nature - Nitrogen cycle, “nitric acid oxidation ” of the nature of the experiment, the text of the experimental design is as follows: Experiment 2 2 test tubes were placed in a small piece of copper, were added a small amount of dilute HNO3 (4mol / L) and concentrated HNO3 (15mol / L), immediately dipped in cotton solution with NaOH solution test tube orifice, observed in vitro Phenomenon; then the above experiment metal copper metal iron for the same experiment, observe the phenomenon. After classroom teaching demonstration experiment found that in the first experimental operation, the NO generated in vitro gas at room temperature quickly and