The spin-only magnetic moment value of an octahedral complex among CoCl₃·4NH₃, NiCl₂·6H₂O and PtCl₄·2HCl, which upon reaction with excess of AgNO₃ gives 2 moles of AgCl is B.M. (Nearest Integer)

Question

The spin-only magnetic moment value of an octahedral complex among CoCl₃·4NH₃, NiCl₂·6H₂O and PtCl₄·2HCl, which upon reaction with excess of AgNO₃ gives 2 moles of AgCl is  B.M. (Nearest Integer)

Canvas Classes · Accepted Answer

Strategy:
 First, identify which of the complexes produces 2 moles of  precipitate per mole of the complex (meaning it has 2 ionizable chloride ions outside the coordination sphere). Then, calculate its spin-only magnetic moment based on the metal's -electron count.

Step 1: Identify the complex
- : Formula is . Reacts with  to give 1 mole .
- : Formula is . Reacts to give 2 moles .
- : Formula is . No ionizable  (gives 0 moles ).
The complex is .

Step 2: Calculate magnetic moment
-  has a  con

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