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白磷是剧毒物质,购置困难,而它又是初中化学实验中不可缺少的试剂。现介绍在实验室中如何制取少量白磷。所需试剂:红磷。仪器用品:铁架台(带铁夹),大试管(20×200mm或18×180mm),酒精灯,烧杯(500ml),试管夹,细铁丝(比试管略长)。制取原理:红磷加热到689K以上/急冷其蒸气白磷
White phosphorus is a highly toxic substance and it is difficult to purchase. It is an indispensable reagent for junior high school chemistry experiments. Now introduce how to make a small amount of white phosphorus in the laboratory. Required reagent: red phosphorus. Instrument supplies: iron stand (with iron clip), large test tube (20x200mm or 18x180mm), alcohol lamp, beaker (500ml), test tube holder, thin wire (slightly longer than the test tube). Preparation principle: red phosphorus heated to above 689K / quench its vapor white phosphorus