我们在教学中经常遇到一些很简单的化学实验,看似普通,但只要认真思考、巧妙设计,就可能推陈出新,取得出人意料的效果。笔者针对中学常见金属的置换反应和一些金属离子与铁氰化钾溶液、硫氰化钾溶液的显色反应进行了巧妙地设计,效果显著。现整理出来与大家分享。 We often encounter in teaching a few simple chemical experiments, seemingly ordinary, but as long as careful thinking, clever design, it may be innovated to achieve unexpected results. I aimed at the common secondary metal replacement reaction and some metal ions and potassium ferricyanide solution, potassium thiocyanate solution color reaction was cleverly designed, the effect is remarkable. Now sorted out to share with you.