Identify the correct decreasing order of wave | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The wavelength of light absorbed $(\lambda)$ is inversely proportional to the crystal field splitting energy $(\Delta_o)$.
The relationship is gi

Vedclass · Accepted Answer

$III > I > IV > II$

Vedclass · Answer

(A) The wavelength of light absorbed $(\lambda)$ is inversely proportional to the crystal field splitting energy $(\Delta_o)$. The relationship is given by $\Delta_o = \frac{hc}{\lambda}$. Stronger ligands cause greater splitting $(\Delta_o)$,resulting in the absorption of light with shorter wavelengths. The spectrochemical series for the ligands is: $I^{-} < H_2O < en < CN^{-}$. Therefore,the order of crystal field splitting energy $(\Delta_o)$ is: $[CoI_6]^{3-} < [Co(H_2O)_6]^{3+} < [Co(en)_3]^{3+} < [Co(CN)_6]^{3-}$. Since $\lambda$ is inversely proportional to $\Delta_o$,the decreasing order of wavelength of light absorbed is: $[CoI_6]^{3-} > [Co(H_2O)_6]^{3+} > [Co(en)_3]^{3+} > [Co(CN)_6]^{3-}$,which corresponds to $III > I > IV > II$.

Identify the correct decreasing order of wavelength of light absorbed for the following complex ions:
$I. [Co(H_2O)_6]^{3+}$
$II. [Co(CN)_6]^{3-}$
$III. [CoI_6]^{3-}$
$IV. [Co(en)_3]^{3+}$

Similar Questions

Write a note on crystal field theory.

Which of the following complex ions absorbs the light of minimum wavelength?

Explain the origin of colour in coordination compounds.

In which of the following complexes of the $Co$ (at. no. $27$),will the magnitude of $\Delta_o$ be the highest?

$A$ $[M(H_2O)_6]^{2+}$ complex typically absorbs at around $600 \ nm$. It is allowed to react with ammonia to form a new complex $[M(NH_3)_6]^{2+}$ that should have absorption at ....... $nm$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Identify the correct decreasing order of wavelength of light absorbed for the following complex ions: $I. [Co(H_2O)_6]^{3+}$ $II. [Co(CN)_6]^{3-}$ $III. [CoI_6]^{3-}$ $IV. [Co(en)_3]^{3+}$