Determining the Appropriate Oxidation State of Chromium in a Reaction

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Discussion Overview

The discussion revolves around determining the appropriate oxidation state of chromium in a specific chemical reaction involving chromium and silver nitrate. Participants explore the oxidation states of chromium, particularly whether to use Chromium (II) Nitrate or Chromium (III) Nitrate, and the criteria for selecting the correct oxidation state.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant queries which oxidation state of chromium should be used in the reaction Cr(s) + AgNO3(aq) -> Cr(NO3)?(aq) + Ag(s).
  • Another participant asserts that the oxidation state should be III.
  • A later reply suggests that if the oxidation state is not provided, one should always use the most stable oxidation state.
  • Another participant agrees, stating that if there is no way to determine the oxidation state, the most stable one should be chosen under the given conditions.

Areas of Agreement / Disagreement

There is some agreement on the idea of using the most stable oxidation state when the oxidation state is not specified. However, the initial question regarding which specific oxidation state to use remains unresolved.

Contextual Notes

The discussion does not clarify the conditions under which the oxidation states are considered stable, nor does it address any specific definitions or assumptions regarding oxidation states in this context.

mystix
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I am working out a reaction and I was wondering if someone could tell me which oxidation state of chromium should be used?

Cr(s) + AgNO3(aq) -> Cr(NO3)?(aq) + Ag(s)

Do I use Chromium (II) Nitrate or Chromium (III) Nitrate? How do I know which one to use?

If anyone could help explain which oxidation state of Chromium is correct, I would really appreciate it!

Thanks!
 
Physics news on Phys.org
III

wikipedia
 
Thanks rocophysics!

So, if you aren't given the oxidation state, always use the most stable oxidation state?

Is this a rule?
 
Yes. If there is no way to determine which oxidation state is involved in the given reaction, pick the most stable one (under the conditions).
 

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