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Question
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Iron [III] chloride to ammonium hydroxide.
Solution
Iron [III] chloride and ammonium hydroxide
\[\ce{FeCl3 + 3NH4OH -> 3NH4Cl + \underset{\text{Iron [III] hydroxide}}{Fe(OH)2↓}}\]
The precipitate formed is Iron [III] hydroxide which is reddish brown in colour.
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