论文部分内容阅读
焰色反应是中学化学教学中一个重要的实验,教材实验步骤繁琐,铂丝(铁丝)需要反复洗烧,且铂丝价格昂贵,现象也不明显。为此,对该实验进行创新设计,选用小瓷坩埚、铝质饮料罐、小高脚玻璃酒杯作为容器,采取固体金属盐滴加酒精直接引燃法,能除杂色干扰,显色时间长,同时可给不同金属进行焰色比色,能重复使用,演示时只需滴加酒精引燃即可,给教师教学带来方便。
Flame color reaction is an important experiment in chemistry teaching in secondary schools, cumbersome teaching materials experiment steps, platinum wire (wire) need to wash repeatedly, and platinum wire is expensive, the phenomenon is not obvious. To this end, innovative design of the experiment, the selection of small porcelain crucibles, aluminum beverage cans, small tall glass as a container, take the solid metal salt drop alcohol direct ignition method, can remove noise interference, color long time, At the same time can give different metal flame colorimetric, can be reused, just drop alcohol presentation can be ignited, to teach teachers to bring convenience.