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Ferric Hydroxide: Precipitated from Ferric Chloride with Excess Ammonia
Hydrated ferric oxide, the brown, slimy precipitate Thorpe's Dictionary (1912) says is best made by adding excess ammonia to ferric chloride solution. Freshly precipitated it dissolves readily in acids; it shrinks a great deal as it dries.
The picture: our diagram.
初学者
1 day
说明
1
1
Precipitate with excess ammonia
Precipitate with excess ammonia
Add excess ammonia to ferric chloride solution: a bulky, brown, slimy precipitate comes down. No amounts are given. Ours: in a beaker, in a fume hood.
此步骤所需材料:
氯化铁溶液1 as required所需工具:
氨水 25-28 %
玻璃烧杯
搅拌器
通风柜(带排风管)
化学防溅护目镜
橡胶手套2
2
Filter and wash (ours)
Filter and wash (ours)
Ours: filter off the precipitate and wash it with water. Keep it moist if it is to be dissolved again: it shrinks considerably in drying.
所需工具:
滤纸
带颈玻璃漏斗
实验室洗瓶
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