化学实验是学习化学的重要途径。要学好化学就要认真作好实验,细心观察实验现象,正确分析实验结论。初学化学的同学,在描述实验现象时,常常出现错误。下面举出几种常见的错误并帮同学们分析。一、以偏概全,描述不完整如对“化学变化和物理变化”一节中镁带的燃烧实验,有的同学 Chemical experiments are an important way to learn chemistry. To learn chemistry, we must conscientiously make experiments, carefully observe experimental phenomena, and correctly analyze experimental conclusions. The beginner chemistry classmates often make mistakes in describing experimental phenomena. Here are some common mistakes and help students analyze. I. Partially generalized, incomplete descriptions such as the burning experiment of magnesium strips in the section “Chemical changes and physical changes”, some students