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Question

The expression for equilibrium constant, Kc for the following reaction is :
Fe3+(aq)+3OH(aq)Fe(OH)3(s)

A
Kc=[Fe(OH3)][Fe3+][OH]3
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B
Kc=[Fe(OH3)][Fe3+][OH]
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C
Kc=1[Fe3+][OH]3
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D
Kc=[Fe(OH3)]
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Solution

The correct option is D Kc=1[Fe3+][OH]3
Fe3+(aq)+3OH(aq)Fe(OH)3(s)
Since the concentration of solids = 1, the expression of
Kc=1[Fe3+][OH]3

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