The magnetic moment of K_3[FeF_6] is ..... B. | vedclass

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(C) In $K_3[FeF_6]$, the oxidation state of $Fe$ is $+3$. The electronic configuration of $Fe^{3+}$ $(Z=26)$ is $[Ar] 3d^5$. Since $F^-$ is a weak fie

Vedclass · Accepted Answer

$5.91$

Vedclass · Answer

(C) In $K_3[FeF_6]$, the oxidation state of $Fe$ is $+3$. The electronic configuration of $Fe^{3+}$ $(Z=26)$ is $[Ar] 3d^5$. Since $F^-$ is a weak field ligand, it does not cause pairing of electrons. Thus, the number of unpaired electrons $(n)$ is $5$. The magnetic moment $(\mu)$ is calculated using the formula $\mu = \sqrt{n(n+2)} \ B.M.$. $\mu = \sqrt{5(5+2)} = \sqrt{35} \approx 5.91 \ B.M.$.

The magnetic moment of $K_3[FeF_6]$ is ..... $B.M.$

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