What Are Three Uses of Rhodium as a Catalyst?

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Discussion Overview

The discussion centers around the uses of rhodium as a catalyst, specifically in the context of a homework question asking for three applications along with balanced chemical equations. Participants explore various reactions involving rhodium, including the reduction of nitrogen oxides, carbonylation reactions, and the conversion of carbon oxides.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that rhodium catalyzes the reduction of nitrogen oxides with a proposed equation.
  • Another participant mentions a carbonylation reaction involving methanol and carbon dioxide.
  • A third use proposed is the vapor conversion of carbon oxide to carbon dioxide, but the equation provided is challenged for being unbalanced.
  • Several participants discuss the impossibility of balancing the last proposed reaction, indicating that the process cannot follow the equation as written.
  • There is a mention of the hydroxyl radical in response to a proposed reaction, with a clarification that radicals are highly reactive and do not require a catalyst.
  • Participants emphasize the necessity of balanced equations for reactions to be valid for catalysis.

Areas of Agreement / Disagreement

Participants generally agree that the last proposed reaction cannot be balanced, leading to a consensus that it cannot represent a valid catalytic process. However, there is disagreement regarding the specifics of the reactions and the validity of the proposed equations.

Contextual Notes

Some participants express confusion about the chemical concepts involved, suggesting a need for further understanding of reaction balancing and the nature of catalysts. The discussion highlights the importance of accurate chemical representation in catalysis.

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Homework Statement


I was reviewing chem the other day, and noticed this question can anyone clarify my answer for me and let me know if I'm correct.

The question states:

Describe three uses of rhodium as a catalyst. ( include both a written description and the balancecd equation).

Homework Equations

The Attempt at a Solution


[/B]
The rhodium in this case will help catalyze the reduction of nitrogen oxides [2NO_x → xO_2+N_2]. Secondly another use would be of the carbonylation reaction by adding a carbon dioxide molecule into methanol. H_3 COH+CO→H_3 CCOOH. Thirdly and finally, it can be used as vapour conversion of carbon oxide to carbon dioxide, which reduces water by adding a carbon dioxide molecule which looks like this: CO+H_2 O→CO_2+H^+
 
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The last reaction - as written - is technically impossible (can't be balanced).
 
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Borek said:
The last reaction - as written - is technically impossible (can't be balanced).
Hi Borek, it's been a while! First off thanks for the reply it is very much appreciated.
But there is vapour conversion of carbon oxide to carbon dioxide right?
Also why exactly is it impossible?
 
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You can't balance the equation, so the process can't follow it.

Doesn't mean there is no vapor conversion of oxides, just the reaction equation must be different.
 
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Borek said:
You can't balance the equation, so the process can't follow it.

Doesn't mean there is no vapor conversion of oxides, just the reaction equation must be different.
CO2 + OH ---> CO + H2O
Would it look more like this then?
 
No such thing as OH (unless you mean a hydroxyl radical, but radicals are so reactive they don't need a catalyst).

Plus, it still can't be balanced.
 
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Borek said:
No such thing as OH (unless you mean a hydroxyl radical, but radicals are so reactive they don't need a catalyst).

Plus, it still can't be balanced.
What exactly am I not understanding here?
Also is there any thing I should relearn to understand this better?
 
Catalyst can work only on real reactions - that means a balanced equation. Try to balance the two equations you posted.
 

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