1.

Specify the oxidation numbers of the metals in the following coordination entities : [Co(H_(2)O)(CN)(en)_(2)]^(2+)

Answer»

Solution :Oxidation numbers can be obtained by adding the oxidation numbers of constituents and equating them with the overall CHARGE on the ion, or ZERO, if it is a molecular COMPLEX.
Assuming x as the oxidation NUMBER of the METAL, we have
`x + (0) + (-1) + (0) = +2` or `x = +3`


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