### Oxidation Numbers 17.29

Posted:

**Tue Nov 21, 2017 6:53 pm**17.29 asks us to name the complex (which I understand) and then to determine the oxidation number of the metal. The solutions manual gives a formula for finding the oxidation number of the metal:

(# of metal atoms)(oxidation number of the metal) + ∑(# of each ligand)(charge of each ligand) = charge of the ion

First, is there an easier/quicker way to find the oxidation of the metal, or is plugging the numbers into the formula the only way?

Second, how do you find the charge of each ligand? With the chemical formula's given in, for example, 17.29d) [Co(SO4)(NH3)5]+

how do I know that the charge of SO4 is -2 like the solutions manual says? Because in 17.29a-c, sometimes the ligand charge is -1 or 0.

(# of metal atoms)(oxidation number of the metal) + ∑(# of each ligand)(charge of each ligand) = charge of the ion

First, is there an easier/quicker way to find the oxidation of the metal, or is plugging the numbers into the formula the only way?

Second, how do you find the charge of each ligand? With the chemical formula's given in, for example, 17.29d) [Co(SO4)(NH3)5]+

how do I know that the charge of SO4 is -2 like the solutions manual says? Because in 17.29a-c, sometimes the ligand charge is -1 or 0.