Determining the Appropriate Oxidation State of Chromium in a Reaction

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The discussion focuses on determining the appropriate oxidation state of chromium in the reaction between chromium and silver nitrate. Participants suggest using the most stable oxidation state when it is not specified, which in this case would be Chromium (III) Nitrate. The consensus is that if the oxidation state cannot be determined from the reaction, opting for the most stable state is a reliable rule. This approach ensures accurate predictions of the products formed in the reaction. Understanding oxidation states is crucial for correctly balancing chemical equations and predicting reaction outcomes.
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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!
 
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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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