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Author: Subject: Gradual addition of powdered KMnO4 to the reaction mixture
phendrol
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[*] posted on 10-3-2014 at 08:38
Gradual addition of powdered KMnO4 to the reaction mixture


I'm trying to figure out how to add a certain ammount of KMnO4 to the reaction mixture through about 4 hours. I tried using a plain addition funnel filled with finely powdered permanganate (just like a sand timer) but it get's stuck.
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Mailinmypocket
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[*] posted on 10-3-2014 at 08:43


A powder addition funnel with a worm screw to feed the reagent in powder form in slowly... They can be a bit pricey though
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vmelkon
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[*] posted on 12-3-2014 at 10:33


Just use a glass rod or plastic rod to push it in.



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gravityzero
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[*] posted on 12-3-2014 at 13:11


Quote: Originally posted by Mailinmypocket  
A powder addition funnel with a worm screw to feed the reagent in powder form in slowly... They can be a bit pricey though



They are pricey but chemglass versions were all over fleabay a few weeks ago. I was like, what is this contraption? Then it all made sense.
I'm gonna get one at some point. More for looks than anything.

In this scenario a coffee stirrer comes to mind.

[Edited on 12-3-2014 by gravityzero]
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