Of the following complex ions, the one that probably has the largest overall formation constant, $K_{f}$ , is :

[C o (N H_{3})_{6}]^{3 +}

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[C o (H_{2} O)_{6}]^{3 +}

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[C o (H_{2} O)_{4} (N H_{3})_{2}]^{3 +}

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[C o (e n)_{3}]^{3 +}

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Solution

The correct option is D $[C o (e n)_{3}]^{3 +}$
$[C o (e n)_{3}]^{3 +}$ is very stable because of it's symmetric nature. Stability of coordination compounds is directly proportional to $K_{f}$ .

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Similar questions

Q. The correct increasing order of wavelengths of absorption in the visible region for the complexes of

C o^{3 +}

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Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $C o^{3 +}$ is

Q. Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of

C o^{3 +}

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The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, $[C o (N H_{3})_{6}]^{3 +}, [C o (C N)_{6}]^{3 -}, [C o (H_{2} O)_{6}]^{3 +}$
$[C o (N H_{3})_{6}]^{3 +}, [C o (C N)_{6}]^{3 -}, [C o (H_{2} O)_{6}]^{3 +}$
(a) $[C o (C N)_{6}]^{3 -} > [C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +}$
(b) $[C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +} > [C o (N H_{3})_{6}]^{3 +}$
(c) $[C o (H_{2} O)_{6}]^{3 +} > [C o (N H_{3})_{6}]^{3 +} > [C o (C N)_{6}]^{3 -}$
(d) $[C o (C N)_{6}]^{3 -} > [C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +}$

Q. Identify the correct order of wavelength of light absorbed for the following complex ions.

[C o (H_{2} O)_{6}]^{3 +}; C o (C N)_{6}]^{3 -}; [C o (I)_{6}]^{3 -}; [C o (e n)_{3}]^{3 +}

I II III IV

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Of the following complex ions, the one that probably has the largest overall formation constant, Kf, is :

The correct option is D [Co(en)3]3+[Co(en)3]3+ is very stable because of it's symmetric nature. Stability of coordination compounds is directly proportional to Kf.

Of the following complex ions, the one that probably has the largest overall formation constant, $K_{f}$ , is :

The correct option is D $[C o (e n)_{3}]^{3 +}$
$[C o (e n)_{3}]^{3 +}$ is very stable because of it's symmetric nature. Stability of coordination compounds is directly proportional to $K_{f}$ .