Question

Three complexes, [cocl(nh3)5] 2+(i), [co(nh3)5h2o]3+ (ii) and [co(nh3)6] 3+(iii) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is

Answer 1

Answer:

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Answer 2

Answer:

Correct order of the wavelength of light absorbed by three complexes is

(I) > (II) > (III)

Explanation:

Given

[CoCl(NH₃)₅] ²⁺                                  (i)

[Co(NH₃)₅H₂O] ³⁺                              (ii)

[Co(NH₃)₆] ³⁺                                     (iii)

Correct order of the wavelength = ??

As energy absorbed is inversely related to wavelength

thus,

E α 1/ λ

strong light α Crystal Field Stabilization Energy (CFSE) α E α 1/ λ

according to energy absorption

(iii) > (ii) > (i)

therefore, correct order of the wavelength is

(I) > (II) > (III)