Difference Between Peroxide & Dioxide - Redox Reactions Explained

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Discussion Overview

The discussion revolves around the differences between peroxides and dioxides, particularly in the context of redox reactions. Participants seek to clarify definitions and characteristics of these compounds, as well as their roles as oxidizers.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Warren questions the difference between peroxides and dioxides and seeks a clear definition, particularly in relation to redox reactions.
  • One participant suggests focusing on the O-O bond as a defining characteristic of peroxides.
  • Warren expresses confusion about the charge of peroxides versus dioxides, proposing that peroxides are cations with a 2- charge, while dioxides are neutral O2 molecules.
  • Another participant explains that peroxides can be identified by their charge, noting that Li2O2 is a peroxide due to the O22- ion, while NaO2 contains a superoxide ion (O2-) and CO2 is classified as a dioxide.
  • Warren inquires about the oxidizing properties of peroxides and whether CO2 acts as an oxidizer.

Areas of Agreement / Disagreement

Participants express differing views on the definitions and characteristics of peroxides and dioxides, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

There are limitations in the discussion regarding the definitions of peroxides and dioxides, particularly concerning the role of charge and the nature of the compounds involved. The distinction between oxidizers and non-oxidizers is also not fully explored.

Whalstib
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Hi,

What is the difference between peroxide and dioxide? Why isn't CO2 carbon peroxide?

I'm finding this important in Redox rxns but have not found a way to differentiate the 2 or actually define them.

Any help appreciatted!

Warren
 
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Look up the definition of "peroxide" and pay special attention to the O-O
 
Thanks for being so quick!

But all I can find is a Wikipedia entry and have gleamed that peroxides are cations 2- as opposed to neutral O2 molecules...right?

So how does one determine if it's a peroxide? NaO2, LiO2, CO2 etc...is it determined by the charge? So Li2O2 a peroxide and LiO2 a dioxide?

I think I got it! Right?

W
 
What are the characteristics of peroxides? Are they oxidizers, and if so, why? Is CO2 an oxidizer? If not, why not?
 
In beginning chemistry at least, you can look at it this way:

You can tell by the charge. Peroxide is O22- as in Li2O2.
The two oxygens in NaO2, however, are not part of peroxide because that ion has a 1- charge: O2- which is superoxide.
In a covalent compound such as CO2, the two oxygens would be called dioxide.
 

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