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Question

Which precipitate is formed when ferric chloride reacts with caustic soda?

[1 mark]

A
Fe(OH)2
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B
Fe(OH)3
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C
FeO
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D
Fe2O3
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Solution

The correct option is B Fe(OH)3
When ferric chloride reacts with caustic soda, the following reaction takes place:
3NaOH(s) + FeCl3(l) 3NaCl(s) + Fe(OH)3(s)

Fe(OH)3 forms reddish brown precipitate.

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