在“过氧化钠与水反应”定量实验探究中提升核心素养

Improving Key Competencies in Quantitative Experiment Exploration of Reaction of Sodium Peroxide and Water

以高中化学中"过氧化钠与水的反应"的定量化实验探究过程为例,针对反应后滴入酚酞时溶液立即变深红色,随后颜色逐渐变浅甚至褪色的反常现象,通过控制变量,多角度探析了反应历程。凸显定量化的实验活动在提升学生实验探究与创新意识、证据推理与模型认知等化学核心素养中的重要作用;归纳了元素化合物模块的实验教学活动的一般思路;更好地说明化学是一门以实验为基础的科学。

Taking the quantitative exploration process of experiment"reaction of sodium peroxide and water"in senior high school chemistry,aiming at the abnormal phenomenon that the solution immediately turns dark red when it is dropped into phenolphthalein after reaction,and then gradually the solution turns light or even fades,the reaction process is explored from multiple dimensions by controlling variables.It highlights the important role of quantitative experimental activities in improving students’awareness of experimental exploration and innovation,evidence reasoning,model cognition and other chemical core literacy;sums up the general idea of experimental teaching activities of element compound module;better explains that chemistry is an experiment-based science.