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+ Inorganic chemistry
+ Oxidation
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Kevin Counihan

What is the oxidation state of CO in [Co(NH3) 5 (CO3) 2-] Br?

Bill Starmann  Follow
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Michael Grace  Follow

You got the cobalt complex [math][Co(NH_{3})_{5})CO_{3}]^{+}Br^{-}[/math]

We take the NEUTRAL ammine ligands away … and the carbonate dianion, [math]CO_{3}^{2-}[/math], and we left with a [math]Co(+III)[/math] centre, i.e. [math]Co^{3+}[/math]

As for carbonate, we got [math]C(+IV)[/math], and [math]3×O(-II)[/math]

As always the WEIGHTED sum of the oxidation numbers gives the overall charge of the anion, or cation …

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