Identify the correct order of the spin-only m | vedclass

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(A) The spin-only magnetic moment is calculated using the formula $\mu = \sqrt{n(n+2)} \, BM$,where $n$ is the number of unpaired electrons.$1$. In $[

Vedclass · Accepted Answer

$[MnCl_4]^{2-} > [CoCl_4]^{2-} > [Fe(CN)_6]^{4-}$

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(A) The spin-only magnetic moment is calculated using the formula $\mu = \sqrt{n(n+2)} \, BM$,where $n$ is the number of unpaired electrons.$1$. In $[MnCl_4]^{2-}$,$Mn$ is in $+2$ oxidation state: $[Ar] 3d^5$. Since $Cl^-$ is a weak field ligand,$n = 5$. Thus,$\mu = \sqrt{5(5+2)} = \sqrt{35} \approx 5.92 \, BM$.$2$. In $[CoCl_4]^{2-}$,$Co$ is in $+2$ oxidation state: $[Ar] 3d^7$. Since $Cl^-$ is a weak field ligand,$n = 3$. Thus,$\mu = \sqrt{3(3+2)} = \sqrt{15} \approx 3.87 \, BM$.$3$. In $[Fe(CN)_6]^{4-}$,$Fe$ is in $+2$ oxidation state: $[Ar] 3d^6$. Since $CN^-$ is a strong field ligand,it causes pairing of electrons,resulting in $n = 0$. Thus,$\mu = 0 \, BM$.Therefore,the correct order is $[MnCl_4]^{2-} > [CoCl_4]^{2-} > [Fe(CN)_6]^{4-}$.

Identify the correct order of the spin-only magnetic moment.

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