Coordination Complexes Video Lessons

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Problem: The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively:oxidation number                             [ Select ]                       ["+1", "+2", "+3", "+6"]      coordination number                       [ Select ]                       ["6", "8", "5"]      

FREE Expert Solution

We’re being asked to determine the oxidation and coordination number of Co in [Co(NH3)5Cl]Cl2.


• Oxidation Number: number of electrons lost by an atom

• Coordination Number: number of ligands attached to a central metal ion


For oxidation number:

x + 2(–1) = 0, where x = charge of [Co(NH3)5Cl]

x – 2 = 0

x = +2

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Problem Details

The oxidation and coordination numbers of cobalt in the compound [Co(NH3)5Cl]Cl2 are, respectively:

oxidation number                             [ Select ]                       ["+1", "+2", "+3", "+6"]      

coordination number                       [ Select ]                       ["6", "8", "5"]      

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