Sum of oxidation state (magnitude) and coordination number of cobalt in is (bpy = 2,2'-bipyridine, a bidentate ligand)

Question

Sum of oxidation state (magnitude) and coordination number of cobalt in  is  (bpy = 2,2'-bipyridine, a bidentate ligand)

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Strategy:
 Identify the oxidation state by balancing the charges of the ligands against the overall charge of the complex. The coordination number is the total number of donor atoms bound to the central metal.

Step 1: Determine the complex and its charge
The compound is .
- Cation:  (charge +1).
- Complex Anion:  (charge -1).

Step 2: Calculate Oxidation State of Co
-  (2,2'-bipyridine) is a neutral neutral ligand (charge 0).
-  has a charge of -1.
Let x be the oxidation state of Co:
.
Magnitud

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