论文部分内容阅读
初三化学新教材上册第七单元《燃烧及其利用》课题１《燃烧的条件》中，教材安排的“活动与探究”里有一项是“对准放在装有热水的烧杯底的硬纸圈中的一小块白磷通入少量氧气（或空气），观察现象（如图１）”。笔者按图１进行实验，发现纸圈在热水中一泡就散开。没办法，只好
One of the “Activities and Exploration” of the seventh chapter of the New Chemistry Textbook Volume 1 “Combustion and Utilization” in the subject “Materials for Burning” is “Aim at the bottom of a beaker with hot water. A small piece of white phosphorus in the paper circle was fed with a small amount of oxygen (or air) to observe the phenomenon (Figure 1)." The author carried out the experiment according to Figure 1, and found that the paper circle spread out in a hot water bubble. No way, only