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sjz_zhaonan木虫 (小有名气)
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[求助]
硅酸盐的鉴别反应原理
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请问鉴别硅酸盐时为什么会产生这个现象 Mix the prescribed quantity of the substance to be examined in a lead or platinum crucible by means of a copper wire with about 10 mg of sodium fluoride R and a few drops of sulfuric acid R to give a thin slurry. Cover the crucible with a thin, transparent plate of plastic under which a drop of water R is suspended and warm gently. Within a short time a white ring is rapidly formed around the drop of water. |
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