Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: Garabato on 10/10/2007 03:09:22

Title: Inhibition reaction??
Post by: Garabato on 10/10/2007 03:09:22

Hi

As its known, Na₃PO₄ is a good inhibitor for the H₂O₂ decomposition.

¿Can annyone please tell me what is the reaction that takes place?

Thanks

Edit: Yeah, I forgot a P, thank you.

Title: Inhibition reaction??
Post by: lightarrow on 10/10/2007 12:51:15

Quote from: Garabato on 10/10/2007 03:09:22

Hi

As its known, Na₃O₄ is a good inhibitor for the H₂O₂ decomposition.

¿Can annyone please tell me what is the reaction that takes place?

Thanks

? Maybe you intended  Na₃PO₄?

Title: Inhibition reaction??
Post by: Bored chemist on 10/10/2007 19:19:52

I think you may have meant H3PO4.
Anyway, the best reason I can think of is that the phosphate ions form complexes with stuff like Fe that would otherwise decompose the H2O2.

Title: Inhibition reaction??
Post by: lightarrow on 11/10/2007 13:34:52

Quote from: Bored chemist on 10/10/2007 19:19:52

I think you may have meant H3PO4.
Anyway, the best reason I can think of is that the phosphate ions form complexes with stuff like Fe that would otherwise decompose the H2O2.

Yes, PO₄^3- is a "sequestrator" (I hope to have translated correcly) for metallic ions who could catalyze H₂O₂ decomposition.

To Garabato: this means that PO₄^3- forms complexes or insoluble phosphates with metallic ions, preventing them to act as catalysts in the decomposition of H₂O₂.