1.

Give the oxidation state and coordination number of the central metal ion in the following complexes.  (A)  [Co(en)3]3+ (B)  K4 [Fe(CN)6] 

Answer»

Calculation of oxidation state of metal in complex ion

(A) [Co(en)3]3+ 

x + 3 (0) = 3 

x = 3

Coordination number = 6 

(en) is bidentate ligand

(B) K4 [Fe(CN)6]

4 (+1) + x + 6(–1) = 0

4 + x – 6 = 0

x = 2 

Coordination number = 6

(CN) is monodentate ligand



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