Design and Practice of the Spatiotemporal Rhythm in the Briggs-Rauscher Oscillatory Reaction
In response to the issue of lack of interest,innovation,and comprehensiveness in current experimental projects of physical chemistry,this article,based on the concept of inheritance and development,improves the classic Briggs-Rauscher reaction(i.e.iodine clock oscillation)into a 4-hour comprehensive experiment.On the one hand,exploring the effects of temperature and light intensity on temporal rhythm can deepen students'understanding and application of Arrhenius equation and basic knowledge of photochemistry.On the other hand,by combining frontier research on spatiotemporal self-organization,this experiment is extended from the temporal dimension to the spatial dimension,exploring the influence of light intensity on spatial rhythms.Through image processing software,the spatial distribution of I2 concentration is qualitatively characterized to analyze spatial rhythms,enhance interest and exploration,and achieve the integration of science and education.In the teaching process,a combination of online and offline teaching modes is adopted to extend the classroom,which not only improves students'ability to discover,analyze and solve problems,but also enhances their innovation ability and sense of social responsibility.
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