新人教版必修1中“铁与水蒸气反应”实验是铁为一种较活泼金属的有力证据,但该反应所需时间长,且不易成功。近年来,许多化学工作者对该实验进行了有益的探索和改进,如利用粉笔、沙子等代替棉花,利用Mg(OH)2提供水蒸气,利用多头酒精灯加 The new PEP compulsory 1 “iron and water vapor reaction ” experiment is strong evidence of iron as a more lively metal, but the reaction takes a long time, and not easy to succeed. In recent years, many chemical workers have made useful explorations and improvements on this experiment, such as using chalk and sand instead of cotton, using Mg (OH) 2 to provide water vapor, using multi-head alcohol lamp plus