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溶液导电性实验是中学化学教学中很重要的一个实验,许多化学概念和化学原理的学习都离不开这个实验的支撑,深刻理解和掌握这些概念和原理需要做好溶液的导电性实验。可是在我们的实际教学中,苦于没有一套操作简便、反映灵敏、效果良好的演示仪。从已有的装置和资料看,有的使用直流电源,有的使用交流电源,电极基本上使用石墨电极,显示电流大小则用小电珠。
Solution conductivity experiment is an important experiment in chemistry teaching in middle school. Many studies on chemical concepts and chemistry principles are inseparable from the support of this experiment. The understanding and mastery of these concepts and principles requires that the conductivity experiment of the solution be done well. However, in our actual teaching, we don’t have a set of demonstration instruments that are easy to operate, sensitive, and effective. From the existing devices and data, some use DC power, and some use AC power. Electrodes basically use graphite electrodes, and display currents use small beads.