Research On The Teaching Of Digital Experiment In Middle School

The relevant content of "primary cell" is one of the most important parts in the chemistry course, which combines the knowledge of physics and chemistry, as well as one of the hot and key points in college entrance test during these years.These knowledge can promote students to understand the transformation from chemical energy into electricity,and guide students to understand the nature of the electrochemical phenomena.However,students often feel difficult to understand this part of contents.They can not fully explain the phenomena which they meet.Meanwhile it is hard for them to understand the energy transformation and current, temperature change in primary cell device.In order to solve this problem, this paper has designed some digital experiments:experiment of the energy transformation in the primary cell without salt bridge and the one with salt bridge; experiment of the voltage change in the primary cell; experiment about how to stabilize the current in the acid Leclanche cell.This study aims to update the method of experiment, to deepen students’ understanding of the primary cell, to improve the students’ ability of explanation and drawing from static to dynamic, macroscopic to microcosmic, qualitative to quantitative and isolation to system.