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Chelation

Amongst the f...

Question

Amongst the following, the most stable complex is

(i) [Fe(H₂O)₆]³⁺

(ii) [Fe(NH₃)₆]³⁺

(iii) [Fe(C₂O₄)₃]^3-

(iv) [FeCl₆]^3-

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Solution

In all these complexes, Fe is in +3 oxidation state. However, the third complex is a chelate because three $C^{2} O_{4}^{2 -}$ ions act as the chelating ligands. Thus, the most stable complex is $[F e (C_{2} O_{4})_{3}]^{3 -}$

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Similar questions

Q. Amongst the following, the most stable complex is:
(i)

[F e (H_{2} O)_{6}]^{3 +}

[F e (N H_{3})_{6}]^{3 +}

[F e (C_{2} O_{4})_{3}]^{3 -}

[F e C l_{6}]^{3 -}

Q. Out of the complexes

{[F e (H_{2} O)_{6})]}^{3 +}

{[F e {(C N)}_{6}]}_{6}^{3 -}

{[F e {(C_{2} O_{4})}_{3}]}_{3}^{3 -}

{[F e {(C l)}_{6}]}_{6}^{3 -}

, the most stable one is:

Q. In the complexes

[F e (H_{2} O)_{6}]^{3 +}, [F e (C N)_{6}]^{3 -}, [F e (C_{2} O_{4})_{3}]^{3 -}

[F e C l_{6}]^{3 -}

most stable is:

Q. In the complexes

[F e (H_{2} O)_{6}]^{3 +}, [F e (C N)_{6}]^{3 -}, [F e (C_{2} O_{4})_{3}]^{3 -}

[F e C l_{6}]^{3 -}

, more stability is shown by :

Q. In the complex

[F e (H_{2} O)_{6}]^{3 +}

[F e (S C N)_{6}]^{3 -}

[F e (C_{2} O_{4})_{3}]^{3 -}

[F e C l_{6}]^{3 -}

, more stability is shown by :

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