“金属与盐酸、稀硫酸的反应”是人教版义务教育教科书《化学(九年级)下册》第八单元课题2中的教学内容。按照教材中的方法进行实验,尚存在一些不足:一是需要较多的试管与药品,造成浪费,不便于大面积推广;二是进行学生小组实验需要很多套装置,完成实验后仪器的清洗工作繁琐(而通常化学教师的任教班级不止一个),不便于连续多班的实验教学;三是铁与盐酸、稀硫酸反应速率过慢,采用演示实验不便于观察气泡的 “Metal and hydrochloric acid, the reaction of dilute sulfuric acid ” is the teaching content of the second unit of the eighth unit of Chemistry (ninth grade) volume of the compulsory education textbook version. In accordance with the teaching methods in the experiment, there are still some shortcomings: First, the need for more test tubes and medicines, resulting in waste, inconvenient for large-scale promotion; Second, the student group experiments require many sets of devices to complete the instrument after the cleaning work Cumbersome (usually more than one chemistry teacher teaching classes), inconvenient for continuous multi-shift experimental teaching; third iron and hydrochloric acid, dilute sulfuric acid reaction rate is too slow, the use of demonstration experiments are not easy to observe the bubble