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Calculate the oxidation state of a metal in the following complexes :(a) [Fe(NH3)6](NO3)3(b) Ni(CO)5. |
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Answer» (a) [Fe(NH3)6](NO3)3 ⇌ [Fe(NH3)6]3+ + 3NO3- NH3 is a neutral ligand, and the charge number of complex ion is + 3. If the oxidation state of Fe is x then, + 3 = x + 6(0) ∴ x = + 3 ∴ The oxidation state of Fe is +3. (b) Ni(CO)5 is a neutral complex and CO is a neutral ligand. If the oxidation state of Ni is x, then zero = x + 5 x (zero) ∴ x = zero. The oxidation state of Ni is zero. |
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