Homework Help

Determine the oxidation number for O2 in the following redox reaction.  ...

user profile pic

mpumpkin | Valedictorian

Posted May 27, 2013 at 5:09 PM via web

dislike 1 like

Determine the oxidation number for O2 in the following redox reaction.

 

CH4+O2-->CO2+H2O

1 Answer | Add Yours

user profile pic

sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted May 27, 2013 at 5:38 PM (Answer #1)

dislike 1 like

You need to remember that usually, the oxidation number of oxygen in any compound, excepting `BaO_2` , is -`2` , hence, in the given redox reaction the oxygen is reduced from 0 to -2 state.

You need to place the oxidation number above each element in redox reaction, such that:

-4 +1        0      +4  -2       1    -2

`C H_4 + O_2 -> C O_2 + H_2 O`

Since the oxidation number of O decreases from 0 to -2, then the oxygen is reduced in the given redox reaction.

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes