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在“空气中氧气含量的测定实验”中,使用气体压强传感器、温度传感器和氧气浓度传感器,通过数显设备以数据曲线的形式记录各物理量的变化情况,并从宏观和微观相结合的视角加以分析。利用三曲线分析实验过程中压强的变化情况以及发生变化的原因,帮助学生更加清晰地了解实验过程和原理。同时培养学生的证据意识和定量研究意识,强化学生宏观辨识和微观探析的化学思维方法,改变学生对传统化学实验的印象。
In the “Determination of oxygen content in air”, gas pressure sensors, temperature sensors and oxygen concentration sensors were used to record the changes of the physical quantities in the form of data curves by means of a digital display device. The combination of macroscopic and microscopic Perspective to be analyzed. Three curves were used to analyze the changes of pressure during the experiment and the reasons for the changes, so as to help students understand the experimental process and principles more clearly. At the same time, students’ awareness of evidence and quantitative research should be nurtured, chemical thinking should be strengthened for students’ macroscopic identification and microscopic analysis, and the students’ impression of traditional chemical experiments should be changed.