The complexion of Fe²⁺ with the chelating agent dipyridyl has been studied kinetically in both the forward and reverse directions.
Fe²⁺ + 3 dipy ⇌ [Fe(dipy)₃]²⁺
For this reaction, the rates of f

Question

The complexion of Fe²⁺ with the chelating agent dipyridyl has been studied kinetically in both the forward and reverse directions.
Fe²⁺ + 3 dipy ⇌ [Fe(dipy)₃]²⁺
For this reaction, the rates of forward and reverse reactions are (1.45 × 10¹³ M⁻³s⁻¹) [Fe²⁺][dipy]³ and (1.22 × 10⁻⁴ s⁻¹) [Fe(dipy)₃²⁺], at 25°C. What is the stability constant of the complex?

Prashant Kotian · Accepted Answer

Correct answer: C. The stability constant (equilibrium constant K_c) is the ratio of the forward rate constant to the backward rate constant. K_c = k_f / k_b = (1.45 × 10¹³) / (1.22 × 10⁻⁴) = 1.188 × 10¹⁷. Therefore, correct answer is C.

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