In the presence of CN–, Fe3+ forms the complex ion Fe(CN)63–. The equilibrium concentrations of Fe3+and Fe(CN)63– are 8.5 ⨯ 10–40 M and  1.5 ⨯ 10–3 M, respectively, in a 0.11 M KCN solution. Fe3+(aq) + 6CN–(aq) ⇌ Fe(CN)63– A. Write the formation constant (Kf) expression. B. Calculate the value for the overall formation constant, Kf and dissociation constant,

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Chapter15: Equilibria Of Other Reaction Classes
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Problem 65E: Sometimes equilibria fur complex ions are described in terms of dissociation constants. Kd . For the...
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In the presence of CN, Fe3+ forms the complex ion Fe(CN)63–. The equilibrium concentrations of Fe3+and Fe(CN)63– are 8.5 ⨯ 10–40 M and  1.5 ⨯ 10–3 M, respectively, in a 0.11 M KCN solution.

Fe3+(aq) + 6CN(aq) ⇌ Fe(CN)63–

A. Write the formation constant (Kf) expression.

B. Calculate the value for the overall formation constant, Kf and dissociation constant, Kd of Fe(CN)63-

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