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化学实验往往会发生一些副反应,甚至污染环境。如在做九年级“燃烧的条件”实验时(图1),由于白磷燃烧产生大量白烟而导致室内白烟(即五氧化二磷固体小颗粒)弥漫,易与空气中的水蒸气结合生成有毒的偏磷酸污染空气,影响师生健康。为此,笔者制作了两种燃烧实验器,实现了有害物质少排放、零排放的效果,使实验现象更清晰、更直观。一、制作探究燃烧条件实验器1.教具装置图教具装置图见图2。
Chemical experiments often occur some side effects, and even pollute the environment. As in the ninth grade “burning conditions ” experiment (Figure 1), white smoke caused by white phosphorus combustion caused indoor white smoke (ie, phosphorus pentoxide solid small particles) filled with water vapor easily in the air Combined with the production of toxic meta-phosphoric acid pollution of the air, affecting the health of teachers and students. To this end, I made two kinds of burning experiment, to achieve less harmful substances, zero discharge effect, the experimental phenomenon more clearly and more intuitive. First, the production of experimental conditions to explore the combustion conditions 1. Aids device Figure Aids device shown in Figure 2.