(英文作文150-300字)描写关于第一次观察化学实验的作文
作文要求:化学实验:高锰酸钾+浓硫酸用玻璃棒沾上少许轻触酒精灯,酒精灯被点燃把少许浓硫酸滴入装有少量白砂糖的器皿里面,有明火和大量烟雾出现不用写的太好大概200字左右描写...
作文要求:
化学实验:
高锰酸钾+浓硫酸 用玻璃棒沾上少许 轻触酒精灯,酒精灯被点燃
把少许浓硫酸滴入装有少量白砂糖的器皿里面,有明火和大量烟雾出现
不用写的太好 大概200字左右 描写第一次观察实验的那种刺激,新奇,好奇的感觉
要求原创。不要直接用百度翻译翻文章。
万分感谢
如果能回答的先评论一下,谢谢 展开
化学实验:
高锰酸钾+浓硫酸 用玻璃棒沾上少许 轻触酒精灯,酒精灯被点燃
把少许浓硫酸滴入装有少量白砂糖的器皿里面,有明火和大量烟雾出现
不用写的太好 大概200字左右 描写第一次观察实验的那种刺激,新奇,好奇的感觉
要求原创。不要直接用百度翻译翻文章。
万分感谢
如果能回答的先评论一下,谢谢 展开
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I had already heard that potassium permanganate is a strong oxidant. In our daily life, we utilize it to disinfect cuts. Concentrated sulfuric acid, known by most people as a dangerous agent, was actually mysterious to me because I had had no access to it before. In this chemistry class, they were mixed and applied to a alchohol lamp. A fierce reaction happened. After a flash, the alchohol lamp was lit. It was so amazing to lit something without fire. Next experiment was about concentrated sulfuric acid. When pured into a cup filled with sugar, the sulfuric acid immediately turned the white sugar into black. Then, the black matter expanded dramaticly, accompanied by flame and smoke. I was so curious to figure out the principles behind the phenomena. I felt so excited about this class.
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2015-11-10
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mysterious to me because I had had no access to it before. In this chemistry class, they were mixed and applied to a alchohol lamp. A fierce reaction happened. After a flash, the alchohol lamp was lit. It was so amazing to lit something without fire. Next experiment was about concentrated sulfuric acid. When pured into a cup filled w
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