Abstract Visual micro chemical experiments were designed with “drop” as the unit of measurement and macro photography as the observation method. The formation of copper-ammonia complexes, silver-ammonia complexes, and iron-ion (Ⅲ) complexes was explored in surface dishes to achieve planarized reaction space. The utilization of a smartphone equipped with a macro lens enabled the elucidation of distinctions between complexes and precipitation. Utilizing projection technology, microscopic phenomena such as the formation and dissolution of precipitates during experiments could be clearly presented in the classroom. The formation of copper-ammonia complexes yielded exquisitely crystalline precipitates, showcasing their aesthetic appeal during the preparation process. The improved experiments possessed the attributes of visualization, miniaturization, safety and environmental protection.
LUO Min, YANG Cai-Li, YANG Li-Jun, LIU Qian. Experimental Study of “Complex Formation” Based on Visualization of Phenomena and Processes[J]. Chinese Journal of Chemical Education, 2025, 46(3): 97-101.
