Precipitated Carbon: Filtering Carbon with Retention Discs

  • Thread starter Thread starter jmnew51
  • Start date Start date
  • Tags Tags
    Carbon
AI Thread Summary
The discussion centers on a user's challenge with filtering fine precipitate formed from an experiment involving carbon, sugar, and concentrated sulfuric acid. Despite using vacuum filtration with a Buchner funnel, the user experiences clogging due to the small particle size. Suggestions include allowing the precipitate to settle and decanting the liquid, as well as using a finer fritted filter disk to improve filtration efficiency. Additionally, employing a fritted filter funnel with an outer jacket may aid in crystallizing the product, potentially alleviating the clogging issue.
jmnew51
Messages
96
Reaction score
0
Hey all, :smile:

I'm new to this board. I really think it's great, and I love to visit whenever I have the time. Mainly to read.

But now I have a question.

I recently did an experiment forming carbon from sugar and conc. H2SO4,
but the precipitate is so fine it emmediately clogs the filter paper. Even when I use a Buchner, with 20-25 uM particle retention disc. I was wondering if there is any way to get the precip to clump up a little, so as to not be so fine and clog the paper, and make the filtering process possible?
Thanx
Jim
 
Chemistry news on Phys.org
Are you using vacuum filtration?
 
Yes, I use vacuum(up to 20" Hg.), and still the filter paper slugs up so quick because the particles are so fine.
I guess maybe I could just let the precip. settle and decant.
 
I thought you don't need to use filter paper when you already have a fritted disk. Well then again your disk is coarse and the pores are big. You may want to try a finer fritted disk for your filtration. A fritted filter funnel with an outer jacket may help crystallize the product as well.
 
Last edited:
It seems like a simple enough question: what is the solubility of epsom salt in water at 20°C? A graph or table showing how it varies with temperature would be a bonus. But upon searching the internet I have been unable to determine this with confidence. Wikipedia gives the value of 113g/100ml. But other sources disagree and I can't find a definitive source for the information. I even asked chatgpt but it couldn't be sure either. I thought, naively, that this would be easy to look up without...
I was introduced to the Octet Rule recently and make me wonder, why does 8 valence electrons or a full p orbital always make an element inert? What is so special with a full p orbital? Like take Calcium for an example, its outer orbital is filled but its only the s orbital thats filled so its still reactive not so much as the Alkaline metals but still pretty reactive. Can someone explain it to me? Thanks!!
Back
Top