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化学试题中的开放性试题, 是化学考试改革的趋势之一,它不仅冲击了封闭的化学课堂教学模式,而且鼓励学生在分析问题和解决问题的过程中提出自己的见解,激发学生的求知欲和创新精神。下面结合近年的中考典型试题举例说明。例1 在室温下,有体积相同且无污染的饱和食盐水和蒸馏水各一杯,请你设计用三种方法予以区分。解析本题所涉及的内容对学生来说并不是全新的,学生通过运用已学化学知识和生活实践,能对
The open questions in chemistry test questions are one of the trends in the reform of chemistry exams. It not only impacts the closed chemistry class teaching model, but also encourages students to present their own opinions in the process of analyzing problems and solving problems, inspiring students’ curiosity. And innovative spirit. The following examples illustrate the typical test questions in the recent high school entrance exams. Example 1 At room temperature, there is a cup of saturated salt solution and distilled water with the same volume and no pollution. Please design and distinguish the three methods. The contents involved in the resolution of this question are not new to students. Students can use the knowledge and practice of life in chemistry.