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1 存在的问题现行高二《化学》“化学反应速率和化学平衡”的学生实验,按照教材和实验报告册的编排进行实验,虽然操作可行,基本上能达到实验教学目的,但我经过反复试做和连续观察两届学生的实验,觉得存在以下明显的不足。(1)使用 Na_2S_2O_3溶液和稀 H_2SO_4来进行浓度、温度对化学反应速率的影响的学生实验中,有污染,难清洗。
1 existing problems The current high school “chemistry” “chemical reaction rate and chemical equilibrium” students experiment, according to the teaching materials and experimental report book arrangement for the experiment, although the operation is feasible, basically to achieve the purpose of experimental teaching, but I tried repeatedly And continuous observation of two students in the experiment, think there are the following obvious deficiencies. (1) In the experiment of students using Na_2S_2O_3 solution and dilute H_2SO_4 for concentration and temperature effects on the chemical reaction rate, it was difficult to clean.