Abstract Four groups of digital experimental situations were created to transform the more abstract precipitation dissolution equilibrium into a simple curve representation. The students actively solved the problems associated with the curve and progressive layer by layer. While solving the problems, they recognized the “solubility” of insoluble electrolytes, constructed a precipitation dissolution equilibrium model, understood the concept of solubility product through quantitative calculation, and judged the movement of equilibrium using the relationship between Q and Ksp. Among them, the digital experiment of turbidity measurement with turbidity meter sensor solved the problem that adding sodium carbonate solution to calcium carbonate saturated solution can not observe the phenomenon of solution becoming turbid with naked eyes.
ZHU Cheng-Dong. Digital Experiment of Handheld Technology Promotes Model Construction in Chemical Teaching: Precipitation Dissolution Equilibrium[J]. Chinese Journal of Chemical Education, 2023, 44(19): 41-45.
