Abstract Students often encounter a variety of thinking obstacles when solving problems involving the context of acid-base titration curves. Model construction approach and its application can help address these thinking obstacles. Such an approach involves an analysis of the underlying structural elements of example problems centering on the five points focused by problem design relating to titration curves of electrolyte solutions, that is, the starting point, equal material point, equivalence point, neutrality point and appropriateness point. Starting from these “five points”, a problem-solving thinking model is constructed to guide students’ divergence and convergence of thinking. Carefully-selected problem-based contexts are utilized to apply constructed thinking models in solving problems relating to acid-base titration curves, thereby inspiring thinking in real-world contexts, facilitating accurate identification of entry point for problem solving and knowledge generation. The practical process is aimed to improve students’ core competencies relating to model cognition and their quality of thinking for the subject of chemistry.
HUANG Cui-Yu, ZHANG Xian-Jin, CHEN Rong-Cong. Addressing Thinking Obstacles in Solving Acid-Base Titration Curve Problems Based on Model Construction[J]. Chinese Journal of Chemical Education, 2021, 42(13): 85-91.
