Designing Colorful Microscale Experiments for Visualizing Acid-Base, Complexation, and Hydrolysis Reactions Based on Structure and Properties of Anthocyanins
ZHANG Peng*
Shenzhen Julong Science Middle School, Shenzhen 518000, China
Abstract Based on the color-changing properties of anthocyanins in response to pH and their complexation with metal ions, a series of miniaturized, green, and visually engaging experiments were designed using cotton pads soaked with red cabbage extract as the reaction substrate. Through two observational approaches “single-substance color development” and “interaction-based color development” chemical processes such as acid-base reactions, shifts in complexation equilibrium, and hydrolysis are transformed into vivid color changes and distinct interfacial phenomena. These experiments are green, safe, low-cost, and exhibit striking visual results, making them suitable for classroom demonstrations, student group experiments, and at-home scientific exploration. They help stimulate students’ interest in learning and deepen their comprehension of abstract chemical concepts.
ZHANG Peng. Designing Colorful Microscale Experiments for Visualizing Acid-Base, Complexation, and Hydrolysis Reactions Based on Structure and Properties of Anthocyanins[J]. Chinese Journal of Chemical Education, 2026, 47(9): 88-93.
