Abstract In scientific experiment teaching of primary school, material dissolution is mostly for students to observe the dissolution process of colored substances, such as brown sugar and sour plum crystal. However, students cannot see the diffusion and dissolution process of colorless substances in water. In order to realize the visualization of the dissolution process of colorless substances, the demonstrative experiments of the mutual dissolution process of alcohol and water as well as the dissolution process of white sugar in water by means of optical method were developed. These experiments provided perceptual knowledge for students to understand the phenomenon of dissolution of substances.
SA Ru-La, HE Yun, ZHANG Zun-Ting, DONG Li-Ying. Visualization Teaching Experiment of Colorless Substance Dissolved in Water[J]. Chinese Journal of Chemical Education, 2023, 44(17): 109-112.