Interesting and Visual Experimental Design of “the Influence of Common Ion Effect on Ionization Equilibrium of Acetic Acid”
WANG Tong-Tong, WANG Su-Qin**, WEI Mei-Hong, LI Hong-Bo**
College of Chemistry and Chemical Engineering, National Demonstration Center for Chemistry Experimental Teaching, Jiangxi Normal University, Nanchang 330022, China
Abstract Taking acetic acid as an example, from the qualitative point of view, the dynamic change process of ionization equilibrium under the influence of the common ion effect is explored through color differentiation and digital technology by using liquid film natural diffusion method. The cartoon droplet shows the interest of chemical experiment, and at the same time realizes the visualization goal of wandering particles in the process of ionization equilibrium. The effective integration of experiment and science and technology makes the disciplinary literacy of changing concept and balance thought perfectly manifest, which is suitable for teachers to use in demonstration experiment teaching. But for students’ perception of color is different, also in order to accurately judge the influence factors of the common ion, colorimetric method using digital imaging from quantitative angle, with the help of smart phones and APP for image acquisition, data processing and analysis, finally the experimental results with concise graph rendering, highlight the scientific and systematic high-order requirements of the experiment.
WANG Tong-Tong, WANG Su-Qin, WEI Mei-Hong, LI Hong-Bo. Interesting and Visual Experimental Design of “the Influence of Common Ion Effect on Ionization Equilibrium of Acetic Acid”[J]. Chinese Journal of Chemical Education, 2022, 43(23): 98-103.
