Oxidation Reduction

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KarineKim2L
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

Oxidation Reduction

Postby KarineKim2L » Sun Feb 16, 2020 5:04 pm

For the example we did in class with MnO4 and Fe, how do we know that the hydrogens and the oxygens that formed water maintained the same oxidation numbers?

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: Oxidation Reduction

Postby Rory Simpson 2F » Sun Feb 16, 2020 5:08 pm

Generally, oxygen will have an oxidation number of -2 and hydrogen will have an oxidation number of +1 across different compounds. However, there are a few exceptions to this (for example, H2O2 where oxygen has an oxidation number of -1.)

Sidharth D 1E
Posts: 98
Joined: Sat Aug 24, 2019 12:17 am

Re: Oxidation Reduction

Postby Sidharth D 1E » Sun Feb 16, 2020 7:19 pm

Oxygen will have an oxidation number of -2, unless it is in O2, or other exceptions like hydrogen peroxide. I believe the same goes with hydrogen being +1.

Kylie Lim 4G
Posts: 110
Joined: Sat Aug 17, 2019 12:15 am

Re: Oxidation Reduction

Postby Kylie Lim 4G » Sun Feb 16, 2020 7:29 pm

The overall charge of a compound is zero unless it is specifically written with a charge. The oxidation numbers for individual elements can be inferred just by looking at the periodic table and deciding which elements are likely to lose or gain electrons. An exception is oxygen which normally has a charge of -2, but becomes -1 in peroxides.


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