Page 1 of 1

Oxidation number

Posted: Mon Nov 26, 2018 4:23 pm
Can someone explain to me how to find the oxidation number? Thank you!

Re: Oxidation number

Posted: Mon Nov 26, 2018 4:33 pm
The way Professor Lavelle explained it in class is that you can calculate the oxidation state/number of a transition metal by looking at the charges of the atoms or ions bonded to in a coordinate complex as well as the overall charge of the complex. The oxidation state/number is the charge of the coordinate compound minus the sum of the charges of the species bonded to the transition metal in question.

Re: Oxidation number

Posted: Mon Nov 26, 2018 9:51 pm
so is the oxidation number basically the charge on the atom kind of like what the charge would be if the atom was an ion?

Re: Oxidation number

Posted: Mon Nov 26, 2018 9:53 pm
Pretty much! The oxidation number is the number of electrons removed from the atom to make it a cation, so if a cation has a 2+ charge that means it has an oxidation number of 2 because 2 electrons have been removed from the original atom

Re: Oxidation number

Posted: Mon Nov 26, 2018 10:19 pm
The oxidation number is the number of electrons gained or lost by an atom of an element.

Re: Oxidation number

Posted: Thu Nov 29, 2018 2:12 pm
Also one thing I always mix up between charges and oxidation states is how to denote them. For an oxidation state, you write + or - #; for charges you write # + or -.

Re: Oxidation number

Posted: Thu Nov 29, 2018 6:32 pm
Also, the way I think about it is that the metal's oxidation number must cancel out with what it's bonded to. And when that's bonded to more molecules it all has to equal to the charge that's given usually on the outside of the brackets. You usually know (or they are given) the charge for the other atoms or molecules and the one left is the metal's so that will be whatever you need to equal the overall charge. When there is an atom or molecule outside the brackets and not a charge then everything inside the brackets must cancel out the charge or the outside, so that's how you figure out what the overall charge of what inside the brackets must equal to.

Re: Oxidation number

Posted: Fri Nov 30, 2018 11:56 am
Also for the s and p block, as you move left to right across the period, the oxidation number goes +1, +2, +3, + or -4, -3, -2, -1.

Re: Oxidation number

Posted: Fri Nov 30, 2018 12:29 pm
The oxidation number is basically how many electrons have been lost or gained in a coordination compound.

Re: Oxidation number

Posted: Fri Nov 30, 2018 1:19 pm
You would find the oxidation number by figuring out how many electrons it would lose or gain.