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一、制取甲烷实验的改进高中化学课本(甲种本)第三册中制取甲烷的实验方法,我们感到教学效果不理想,反应速度慢,点燃甲烷时火苗很小或者失败。我们改用无水醋酸钠(烘炒过的)生石灰(市售粉末状)和氢氧化钠(研碎),按照质量比为1∶1∶1混和均匀后,用铝箔筒或废启动器筒裝好,放入硬质试管中加热。铝筒的作用使反应物受热均匀和防止氢氧化钠腐蚀试管。铝筒可连用几次。
First, the preparation of methane experiment improvement High school chemistry textbooks (A kind) this book made the experimental method of methane, we feel that the teaching effect is not ideal, the reaction is slow, the ignition of methane is very small or failed. We switched to anhydrous sodium acetate (roasted and cured) quicklime (commercial powder) and sodium hydroxide (pulverized), mixed uniformly at a mass ratio of 1:1:1, and used aluminum foil drum or waste starter cartridge. Place it in a hard tube and heat it. The role of the aluminum cylinder allows the reactants to be heated evenly and prevents the sodium hydroxide from corroding the test tube. Aluminum can be used several times.