用氯酸钾和二氧化锰混和制取氧气时往往有一股异味,且有较明显的白烟,生成的氯化钾也带有浅紫红色。 有关文献和实验表明,氧气中的异味是氧气中混有少量氯气。为此,可用淀粉碘化钾试纸加以验证,白烟是氧化钾的白色小颗粒分散 When oxygen is mixed with potassium chlorate and manganese dioxide, there is often an odor, and there is more obvious white smoke, and the resulting potassium chloride is also light purple. Relevant literature and experiments show that the odor in oxygen is a small amount of chlorine mixed with oxygen. For this purpose, it can be verified by using starch potassium iodide test paper. White smoke is a dispersion of white small particles of potassium oxide.