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Author: Subject: Dry Si+KMnO4=?
Conure
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[*] posted on 23-5-2023 at 02:29


Quote: Originally posted by B(a)P  
Quote: Originally posted by Conure  
Quote: Originally posted by B(a)P  
Quote: Originally posted by Conure  
Quote: Originally posted by B(a)P  
Can you test the properties of your reaction products?

I dont have any lab equipment so it would have to be very simple tests, if you have any ideas. Btw the end products look like black glass. Perhaps it's SiO2 mixed with MnO2.


You could react it with hydrochloric acid and estimate how much MnO2 is present by observing the evolved chlorine gas. Try taking a small sample (sub gram) and grinding it finely, then slowly add HCl to your sample if it bubbles and you see a yellow gas then you know you have a decent quantity of MnO2 in your product. If you have peroxide you could do a similar test with that (add peroxide to a ground sample of your product), as MnO2 will decompose peroxide into water and oxygen. Try the peroxide test first if you have it, oxygen is obviously a lot friendlier than chlorine.

The only H2O2 I have access to is 12%, would that be enough?


Yes MnO2 will decompose 12% peroxide.

I dripped some H2O2 on the products and started bubbling. (but that also happened when the luquid hit the steel plate beneth it.) The products left some brown foam after the bubbling.




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