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(see attachment)
What are (A) and (B)? Give IUPAC name of (A). Find the spin only magnetic momentum of (B)

Hrishant Goswami , 10 Years ago
Grade 10
anser 1 Answers
Jitender Pal

Last Activity: 10 Years ago

Hello Student,
Please find the answer to your question
Fe3+ + SCN- → [Fe(SCN)(H2O)5]2+
(excess) (blood red)
(A)
[Fe(SCN)(H2O)5]2+ + 6F- → [FeF6]3- + SCN-
(B)
IUPAC name of A is pentaaquathiocyanatoferrate (III) ion IUPAC name of B is hexafluoroferrate (III)
In [FeF6]3- oxidation state of Fe = 6
In [FeF6]3- oxidation state of Fe = + 3
∴ It has 5 unpaired electrons, n = 5, Fe3+ is 3d5
Magnetic moment (μ) = √n(n + 2) (B.M.)
√5(5 + 2) = √35 = 5.92 B.M.

Thanks
jitender
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