1.

Specify the oxidation numbers of the metals in the following coordination entities : [CoBr_(2)(en)_(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 + 2(-1) + 0 = +1` or `x = +3`


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