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一、过氧化钠与二氧化碳的反应实验高一化学第四章《碱金属》的第二节“钠的化合物”中讲到:过氧化钠跟二氧化碳起反应,生成碳酸钠和氧气,方程式是:2Na_2O_2+2CO_2=2Na_2GO_3+O_2因此,它用在呼吸面具上和潜水艇里作为氧气的来源。但是课本中没有安排演示实验。为了加深学生对过氧化钠这一化学性质的理解和巩固,增强感性认识,同时也复习二氧化碳的制取和氧气的检验方法,我在教学中补充了下面的演示实验,收到了很好的效果。
First, the reaction of sodium peroxide and carbon dioxide experiment The first chapter of the fourth chapter of the “alkali metal” “sodium compounds” said: sodium peroxide reacts with carbon dioxide, generating sodium carbonate and oxygen, equation Yes: 2Na_2O_2+2CO_2=2Na_2GO_3+O_2 Therefore, it is used as a source of oxygen on respiratory masks and submarines. However, no demonstration experiment was arranged in the textbook. In order to deepen students’ understanding and consolidation of the chemical nature of sodium peroxide, to increase perceptual awareness, and to also review methods for carbon dioxide production and oxygen testing, I supplemented the following demonstration experiments in teaching and received very good results. .