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Charge of oxygen

Posted: Fri Feb 21, 2020 5:57 pm
by MaryBanh_2K
Will the charge of O2 always be -2 even if it stands alone? Can someone explain the charges of different kinds of oxygen such as O and O3 and up?

Re: Charge of oxygen

Posted: Fri Feb 21, 2020 6:17 pm
by Jaci Glassick 2G
My TA said that for the purposes of this class, it is safe to assume that the charge of O2 will always be 2-. As for ozone, I'm pretty sure the charge is 0.

Re: Charge of oxygen

Posted: Fri Feb 21, 2020 6:18 pm
by Gerald Bernal1I
The oxidation state of oxygen will always be -2.

Re: Charge of oxygen

Posted: Fri Feb 21, 2020 6:37 pm
by Sanjana Borle 2K
Yeah, my TA also said that you can assume that the charge of Oxygen is -2. Using this known value we can use it to find the oxidation numbers of other elements.

Re: Charge of oxygen

Posted: Fri Feb 21, 2020 6:42 pm
by Betania Hernandez 2E
The oxidation state of O2 will be -2 even if it stands alone. For O3, the oxidation state will be 0. Oxygen is sometimes -1 such as peroxides, H2O2, since hydrogen has an oxidation state of +1

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 12:48 am
by Orrin Zhong 4G
Holdup... isn't the oxidation state of O2 equal to zero? O2 has two oxygens, which means that they both have the same electronegativity and as a result, they share the electrons equally among themselves. Therefore the oxygen should not have gained electrons from itself. The oxidation numbers of pure elements (such as O3) is zero since the electrons aren't pulled to one atom specifically due to their equal electronegativities. Oxygen in a compound with different atoms will have an oxidation state of -2 (except for peroxides) since it likes electrons more than the other atoms in the compound.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 2:24 am
by Michelle Song 1I
Shouldn't the oxidation state of oxygen in O2 be zero?

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 10:29 am
by Nuoya Jiang
The oxidation number of oxygen would probably always be 2.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 10:41 am
by Wendy 1E
The oxidation number of oxygen is usually 2-, except in peroxides where it is 1- and ozone where it is 0.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 10:45 am
by Jasmine Kim 1L
In most gases, such as H2 or O2, I'm pretty sure the oxidation number is 0, or else it would be shown having a charge.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 11:13 am
by Ellis Song 4I
I believe we can assume that the oxidation number for Oxygen will be -2 and for Hydrogen it will be +1

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 12:03 pm
by Madeline Phan 1E
Yes, we can assume the oxidation number of oxygen is -2 when it stands alone.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 2:06 pm
by Anish Natarajan 4G
The charge in this case will be 0 since Oxygen in this form is in a diatomic molecule.

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 5:36 pm
by 005206171
I believe O2 and hydrogen peroxide are some exceptions to Oxygen’s -2 rule

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 6:05 pm
by preyasikumar_2L
Michelle Song 1I wrote:Shouldn't the oxidation state of oxygen in O2 be zero?


The oxidation state of each individual oxygen in compounds that have other elements of different electronegativity is -2, except in peroxides where it's -1. In O2, where there's no polarity in the bonds shared due to the fact that both oxygen atoms have the same electronegativity, the average oxidation state would be 0.

(It is possible but most likely unlikely that you are thinking of the standard enthalpy of formation of O2, which is 0 because that is in its standard state.)

Re: Charge of oxygen

Posted: Sat Feb 22, 2020 6:37 pm
by 205405339
at least from previous classes I took, it is usually safe to assume that O2 will have a -2 charge