化学是一门以实验为基础的自然学科,大部分化学知识是通过化学实验得出的。利用化学实验和对实验现象进行分析,不仅是学生获得知识的途径,更是培养学生科学探究能力的过程。在化学实验教学中,经常会出现“非预期性”实验现象或问题,这些“非预期”的实验现象或问题会对课堂教学产生一定的冲击,若教师处理不当,课堂教学就会陷入困境或僵局。因此,教师应该在上课之前对实验认真研究,做充分准备,在课堂上应本着实事求是的态度,把“非预期”实验现象或问题看成是一种宝贵的教学资源,引导学生对它进行思考分 Chemistry is a natural science based on experimentation. Most chemical knowledge is obtained through chemical experiments. The use of chemical experiments and analysis of experimental phenomena is not only a way for students to acquire knowledge, but also a process of training students’ scientific inquiry ability. In the experiment of chemistry experiment, “unintended ” experiment phenomenon or question often appears, these “unintended ” experiment phenomenon or question will have certain impact on classroom teaching, if the teacher handles improperly, the classroom teaching Will be in trouble or deadlock. Therefore, teachers should carefully study the experiment before class, fully prepare for it, classify the “unexpected” experiment phenomenon or problem as a valuable teaching resource in the classroom in a practical and realistic manner, and guide students to It points to thinking