Naked Science Forum
Non Life Sciences => Chemistry => Topic started by: mogsmar5 on 28/01/2010 19:05:20
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I know they're related but I'm not sure how.
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The oxidation number is the charge that a central atom would have if all of its ligands were removed, including the electron pairs being shared with those ligands.
For example, in carbon dioxide - CO2 - the carbon oxygen bond is a double = bond:
O=C=O
This means that two pairs of electrons are involved in each bond.
If the oxygens were removed, together with the electrons pairs, this would leave the carbon in a +4 state - hence oxidation number 4.
For water - H2O - it would be two pairs of electrons being removed from the oxygen (one for each hydrogen) hence oxygen has a +2 oxidation state.
This means that the oxidation number can tell you the charge on the individual ions made by an element.
Chris