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oxidation number

Posted: Sun Feb 16, 2020 11:13 pm
by josmit_1D
how do you calculate oxidation numbers?

Re: oxidation number

Posted: Sun Feb 16, 2020 11:24 pm
by Petrina Kan 2I
You look at the known charges or the charges that are present on the specific element in the reaction, and make it equal that charge. If there is no charge present on a compound then the oxidation numbers cancel out!

Re: oxidation number

Posted: Sun Feb 16, 2020 11:25 pm
by Martina
You have to check the known charges of the ions and make sure that they balance out for the entire equation.

Re: oxidation number

Posted: Sun Feb 16, 2020 11:30 pm
by Prasanna Padmanabham 4I
Oxidation numbers are basically the charges on an atom/ion...do you have a specific question/reaction in mind?

By the way, I found this really helpful article on Khan Academy https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/a/oxidation-number if you wanted to take a look...

Re: oxidation number

Posted: Mon Feb 17, 2020 12:13 am
by 005162520
From the periodic table, which ones are the common ones when they are the most electronegative?

Re: oxidation number

Posted: Mon Feb 17, 2020 12:26 am
by SVajragiri_1C
You can just memorize the charge for the basic elements like oxygen, nitrogen, carbon, hydrogen, etc. And the others are pretty similar to their ion charge, so just know that.

Re: oxidation number

Posted: Mon Feb 17, 2020 2:35 pm
by Louise Lin 2B
you can also find oxidation numbers in the context of the reactions, like when you write out the oxidation and reduction half-reactions

Re: oxidation number

Posted: Mon Mar 09, 2020 12:18 am
by SVajragiri_1C
H is +1, O is -2. The sum of oxidation numbers is equal to the overall charge of the compound, so do some backwards calculations to figure out oxidation numbers of other compounds.

Re: oxidation number

Posted: Mon Mar 09, 2020 12:58 am
by ABombino_2J
You need to take the known charges of the elements in the molecule and then find the different between that and the overall charge of the reaction.

Re: oxidation number

Posted: Mon Mar 09, 2020 9:51 pm
by Leslie Almaraz 4G
it also can depend on the reaction and the compound

Re: oxidation number

Posted: Mon Mar 09, 2020 10:38 pm
by anjali41
It is important to know that O has an oxidation number of 2- and H has an oxidation number of 1+. You are usually given the overall charge of a molecule. All the individual charges should add up to the overall charge. Thus, you can then solve for the unknown oxidation number.