以“离子反应”教学为案例,基于电导率传感器的数字化实验,从数字化实验的准备、操作、实验图像分析到符号表征的学习等过程中,强化学生对电解质溶液中微粒种类和存在的认识,深化学生对微粒间相互作用及其变化的理解,从而理解离子反应的实质,逐步引导学生发展和深化微粒观。 Taking “ion reaction” teaching as a case, based on the digitized experiment of conductivity sensor, from the preparation of digital experiment, operation, experiment image analysis to the study of symbol characterization, etc., students’ types and existence of microparticles in electrolyte solution are intensified. Recognize and deepen students’ understanding of the interactions between particles and their changes, so as to understand the nature of ion response, and gradually guide students to develop and deepen the concept of particles.