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高中化学人教版选修4“化学反应速率”一节教学时,涉及测量化学反应速率的实验,教材选用Zn粒与不同浓度的硫酸反应,测定用针筒分别收集10 mL H_2所用的时间,从而比较反应速率的大小。在实际操作中,由于针筒的针嘴部分很小,实验室中的乳胶管与之不匹配,极易漏气,实验很难成功。笔者尝试通过先进的DIS数字化信息系统把原来分两次
High School Chemistry PEP elective 4 “chemical reaction rate ” section of a teaching, involving the measurement of chemical reaction rate experiments, textbook selection of Zn particles and different concentrations of sulfuric acid reaction, measured with a syringe were collected 10 mL H_2 time , To compare the size of the reaction rate. In practice, due to the syringe needle mouth is small, laboratory latex tube mismatch with it, easily leak, the experiment is difficult to succeed. The author tries to divide the original twice through the advanced DIS digital information system