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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.
Beginner
1 day
Instructions
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.
Materials for this step:
Ferric Chloride Solution1 as requiredTools needed:
Ammonia Solution - 25-28%
Glass Beaker
Stirrer
Fume Hood (Ducted)
Chemical Splash Goggles
Rubber Gloves2
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.
Tools needed:
Filter Paper
Glass Funnel - Stemmed
Wash Bottle
Distilled WaterMaterials
1- 1 as requiredPlaceholder
Tools Required
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