1.

Account for the following : Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.

Answer»

Solution :Methylamine being more basic than water, accepts a proton from water liberating `OH^(-)` ions.

These `OH^(-)` ions combine with `Fe^(3+)` ions PRESENT in `H_(2)O` to form brown ppt. of hydrated ferric oxide.
`""FeCl_(3) rarr Fe^(3+)+3CL^(-)`
`""2Fe^(3+)+6OH^(-) rarr underset(underset("(Brown ppt.)")("Hydrated ferricoxide"))(2Fe(OH)_(3)" or "Fe_(2)O_(3).3H_(2)O`


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