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Which of the following is the definition of the constant, "Kf"?

Which of the following is the definition of the constant, "Kf"?

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Answer #1

Formation constant, Kf, describes the formation of a complex ion from its central ion and attached ligands. Reference :

http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Coordination_Chemistry/Complex_Ion_Equilibria/Complex-Ion_Equilibria

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