采用无水醋酸钠与碱石灰共热的方法来制取甲烷,是现行高中化学教材中编排的一个实验。按课本的配比进行实验时,因反应速度慢,甲烷产率低,试管易破损而影响实验效果,所以探讨实验室制取甲烷的最佳配比,已成为人们关注的一个实验教学研究课题。本文运用双指标的正交试验设计,探讨用无水醋酸钠和自制碱石灰反应制取甲烷的最佳配比。 The use of anhydrous sodium acetate and soda lime for the preparation of methane is an experiment organized in the current high school chemistry textbook. When the experiment is performed according to the ratio of textbooks, because the reaction rate is slow, the methane yield is low, and the test tubes are easily damaged, which affects the experimental results. Therefore, exploring the optimal ratio of methane in the laboratory has become a subject of experimental teaching research. . In this paper, the orthogonal design of double indexes was used to explore the optimal ratio of anhydrous methane acetate to self-made soda lime to prepare methane.