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KCET2016ChemistryChemical Equilibrium

In the reaction; ( F e( OH )₃( ~s ) F e³⁺(a q)+3 OH ⁻(a q) ), if the concentration of ( OH ⁻ )ions is decreased by ( 1 4 ) times, then the equilibrium concentration of ( F e³⁺ ) will increase by,

Options

  1. A( 8 ) times
  2. B( 16 ) times
  3. C( 64 ) times
  4. D( 4 ) times

Correct answer

C. ( 64 ) times

Step-by-step solution

[ array l Fe ( OH )₃( ~s ) Fe ³⁺(a q)+3 OH ⁻(a q) K_ eq = [ Fe ³⁺ ] [ OH ⁻ ]³ K_ eq = [ Fe ³⁺ ] [ 1 4 OH ⁻ ]³= [ Fe ³⁺ ] [ OH ⁻ ]³ 64 array ] Therefore, to maintain the equilibrium, the equilibrium concentration of ( F e³⁺ ) will increase by ( 64 ) times

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