| 查看: 806 | 回复: 0 | ||
sjz_zhaonan木虫 (小有名气)
|
[求助]
硅酸盐的鉴别反应原理
|
|
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. |
回复此楼» 猜你喜欢
航天502所 高瑛珂博士 婚内征婚 欺骗女性开房
已经有25人回复
-
26/27申博
已经有4人回复
-
地球科学部D01口青年基金，最低几A几B几C才能有几率中呀。
已经有4人回复
-
宿州学院学报
已经有6人回复
-
投稿文章被秒拒了
已经有5人回复
-
招收2026级博士生
已经有6人回复
-
博士申请
已经有5人回复
点击这里搜索更多相关资源