利用手持技术探究“过氧化氢分解制取氧气”实验

Preparation of Oxygen from Decomposition of Hydrogen Peroxide Based on Hand-Held Technology

针对微型化学实验中实验产物量少的特点，将手持技术的氧气传感器作为检测器应用于“二氧化锰催化过氧化氢分解制取氧气”的微型化学实验之中，是进一步减少微型化学实验中化学试剂用量的新途径和新方法。通过计算机对数字化实验结果的曲线展示，将实验现象转化成直观的数字与图像，使实验结果更加精准，学生能在实验中同步观察实验进程，使学生对实验现象的主观感知和定量理解更加深入，探究也更加准确。

The mass of products from microscale chemistry experiment was few, thus this paper used oxygen sensor as a detector applying to the microscale chemistry experiment ＂prepara- tion of oxygen from decomposition of hydrogen peroxide catalyzed by manganese dioxide＂, this method could further reduce the dosage of chemical reagents. The experiment results were dis- played through curve in the computer, and the experimental phenomena were transformed to in- tuitive figure and image. The application of hand-held technology in this experiment could help students not only observe the experimental process simultaneously, but also deepen understand- ing of quantitative research and perceiving of the experimental phenomena.