学生实验是形之有效的、让学生亲自实践来培养实验能力的一种主要形式，充分发挥学生实验的效用，对于全面提高化学教学质量具有特殊意义。实验教学要达到预期结果，这是化学教学的基本要求，但是在学生实验中常会有失败或反常情况出现。实验失败就是从反面为学生提出了问题， Student experiments are effective, and a major form that allows students to practice themselves to cultivate experimental abilities. Giving full play to the effectiveness of student experiments has special significance for improving the quality of chemistry education. Experimental teaching should achieve the expected results. This is the basic requirement of chemistry teaching, but there are often failures or abnormal situations in student experiments. The failure of the experiment is to ask students questions from the wrong side.