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Question

The deep red colouration is due to the formation of:
  1. Fe(CH3COO)
  2. [Fe3(OH)2(CH3COO)6]+
  3. [Fe3(CH3COO)6]
  4. Fe(OH)2CH3COO

A
Fe(OH)2CH3COO
B
[Fe3(CH3COO)6]
C
Fe(CH3COO)
D
[Fe3(OH)2(CH3COO)6]+
Solution
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When added to neutral FeCl3, acetates produce a red coloration.

FeCl3+3CH3COOH(CH3COO)3Fe+3HCl

In aqueous solution it forms [Fe3(OH)2(CH3COO)6]+.

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