一、原实验存在的缺点1.实验操作步骤繁琐,实验耗时长。2.实验过程不连贯,氢气损失过多,耗费资源。3.实验的安全性不高、性质现象不明显。4.氢气性质实验的验证中,难以区分水的产生是由氢气制备之时引入的还是由氢气的燃烧产生的。二、实验原理1.氢气的制备 First, the shortcomings of the original experiment 1. Tedious experimental steps, the experiment takes time. 2. Experimental process is inconsistent, excessive hydrogen loss, cost of resources. 3. Experimental safety is not high, the nature of the phenomenon is not obvious. 4. In the verification of hydrogen property experiment, it is difficult to distinguish whether the water is produced when hydrogen is prepared or by the combustion of hydrogen. Second, the experimental principle 1. Preparation of hydrogen