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Question
Calculate the oxidation number of the central metal atom (underlined) in the following complex species:
[Co(NH3)6]3+
Numerical
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Solution
The complex ion is:
[Co(NH3)6]3+
Where:
Let the oxidation number of cobalt (Co) be x.
Ammonia (NH3) is a neutral ligand, so its oxidation number is 0.
The overall charge on the complex ion is +3.
The equation:
x + 6(0) = +3
x = +3
Thus, the oxidation number of Co in [Co(NH3)6]3+ is +3.
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Chapter 9: Coordination Compounds - Review Exercises [Page 517]
