一、研究背景“对蜡烛及其燃烧的探究”实验选自九年级化学教材(人教版)上册第一单元的课题2,其中有两项验证:一是验证蜡烛火焰的外焰温度最高;二是检验蜡烛燃烧的产物。教材中介绍的方法是:(1)取一根火柴梗,拿住一端迅速平放入火焰中,约1 s后取出,观察火柴梗不同部位的被烧情况;(2)分别取一个干燥的烧杯和一个用澄清石灰水润湿内壁的烧杯罩在蜡烛火焰上方,观察烧杯内壁是否出现水珠和澄清石灰水是否变浑浊。两个 First, the research background “Candle and its combustion ” experiment from the ninth grade chemistry textbook (PEP) Volume 1 of the first unit of the subject 2, of which there are two validations: First, to verify the candle flame flame temperature The highest; the second is to test the burning candle products. The teaching methods are as follows: (1) Take a matchstick and hold it quickly flat into the flame, take out after about 1 second and observe the burning situation of different parts of matchstick; (2) Take a dry A beaker and a beaker moistened with an inner wall of clear lime water are placed over the candle flame to see if the beaker and clear lime water appear turbid on the inner wall of the beaker. Two