现行高中《化学》第一册(必修,人教版)中关于浓H_2SO_4的强氧化性、酸性,稀 H_2SO_4的酸性等用了多个实验进行演示,操作复杂,仪器使用繁琐。笔者在教学中将其进行了改进,使用一个装置就能体现出 Fe 与 H_2SO_4反应的几个系列实验。如:浓 H_2SO_4能使铁发生钝化,加热时能将铁氧化,随着反应的进行,当浓度降到一定时,变为稀 H_2SO_4又与铁反应产生 H_2。经过组合可以使操作简便,现象明显,并且有毒气体不会散发到空气中。 The current high school “Chemistry” in the first volume (Compulsory, PEP) of strong H_2SO_4 on the strong oxidation, acidity, the acidity of dilute H_2SO_4 used a number of experiments to demonstrate, the operation is complicated, the instrument is cumbersome. The author has improved it in teaching, using a device to reflect several series of experiments in the reaction of Fe and H_2SO_4. For example, H_2SO_4 can passivate iron and oxidize iron when heated. As the reaction progresses, H_2SO_4 reacts with iron to produce H_2 when the concentration drops to a certain level. After combination, the operation is simple, the phenomenon is obvious, and no toxic gas is emitted into the air.