Benzoic Acid, Recrystallization, and Solubility vs pH
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- เผยแพร่เมื่อ 2 ต.ค. 2015
- In this video I perform the simple isolation of benzoic acid from a salt, then recrystallize. I also touch on some basics of pH-driven solubility.
- วิทยาศาสตร์และเทคโนโลยี
enjoy watching all your videos. They are always concise.
I actually learned quite a bit from this video. Thanks
those crystals are awesome. glad to see you uploading more videos!
+TheKingOfChem I plan to keep doing it too :)
And he's gone awol again...
This looks awesome, I'm waiting to see what you do with them
Very satisfying to see such beautiful needle-like crystals form after the recrystallization. Quality over quantity sure pays off with such a cheap chemical. Keep posting videos!
So I'll just assume the answer to my question about you being back for real is "yes". Great to see you back! :) You have an awesome lab.
Your chemistry videos are the best ever on youtube!
+Constantino Fine Art Thanks!
Recrystalizing benzoic acid is fun, because it's so easy and looks awesome, too :) Nice video!
Outstanding video, with no nonsense commentary. I love the little side notes, e.g. about the scum on top of the mixture. Subscribed :)
Intresting. My crystals were much more flakey when I did this.
Thank you very much wait more
Can I use the same method if I want to precipitate out gallic acid (3,4,5 - trihydroxy benzoic acid), a from a plant extract consisting of various compounds? Thank you.
Where did you get your vacuum filter funnel from ?
Please do a video on equipment and techniques. I'm a layman and enjoy watching your videos but a lot of it is over my head. I was trying to figure out how your vacuum filtration works with the water. It would be interesting if you described the equipment and glassware you have and use.
Very informative (:
Cool Beans!
Hi, I love your video. Is it possible to perform recrystallization with a mix of pure benzoic acid and barium chloride (both powders)?
No cuz both are very low soluble in water so it is very difficult to dissolve them
If you want to make barium benzoate then, add barium carbonate to benzoic acid solution
the fact that you have a permanent vacuum line in your lab is the fucking coolest thing ever
Beautiful crystals👌👌
Niyati Kadam , is tat meth ?
Can you teach us how to synthesize potassium tetra oxalate dihydrate in the lab?
Nice bro
Why does he introduce a stronger acid (HCl)? Can someone please explain.
Great video 👍 , i have a question please , is it possible to create pheneylacetone from benzoic acid ? Thankss
could you reduce benzoic acid to toluene?
Could you make a video about the parts you used to make your vacuum pump?
+MrCrazyChemist It's just a water aspirator. I bought it from Carolina Biological. I just routed the lab plumbing so it could be permanently installed.
Try dissolving that benzoic acid in acetone then hit it with the ketene lamp. Is it possible to create a mixed anhydride like that? What would that even make?
A bomb
Thought i would google "benzoic acid" after i saw the the name on the back of the white monster can! :D i should probably get on with some work..
how does NileRed keep is stir bar so quite? That ticking got right up in my noggin
He cuts out most of the audio.
how do you clean your frit? i tried a bunch of solvents on mine when it got contamned in a bromine extraction... nothing would get the red / brown out of it until i doused it with sulfuric acid followed by conc. h2o2. and then i threw some naOH in and left the room for a few hours while it ... reacted. that finally got it a really brilliant white again, but i hope it did not damage the frit in the process. I'd love to hear how it's supposd to be done.
well, I did not have any thiosulfate on hand and the local grocery store was out of it at the time! jk, dont even kno what that is. I did try the usual suspects... acetone, alcohols, toluene, naptha, xylene, acetic acid..
*****
ohya? good to know. thanks mate.
if u need PhCOOH 4 ur rxns y not just buy the acid instead of the Na/K salt?
Nice video, is it possible to do the same with potassium sorbate to form SORBIC ACID?
Probably, since potassium sorbate is far more soluble than sorbic acid. There would be a small loss, as sorbic acid is soluble at ~1.5 g/100ml @20C. What do you need sorbic acid for?
It is for use as a preservative in an Acidic cosmetic product and potassium sorbate is way cheaper than sorbic acid
Where did the potassium chloride come from? I could understand you saying KCl if you were using potassium benzoate but you're using sodium benzoate.
+gamerv08 he explained how the chemistry work like he is going to use sodium benzoate but he actually used potassium benzoate you can hear him say that at 2:54
Thank you.
But is the same
In which solvent can you do a recrystallisation of copper carbonate ?
+Zock4 Copper carbonate is almost insoluble in all solvents (it can dissolve in acids, but it'll decompose, of course)
so to purify it, just add in dilute hydrochloric acid or sulfuric acid. it'll foam up and release carbon dioxide.
add the acid until solution is clear and bubbling stops.
Filter the resulting blue/greenish blue solution
Add excessive amount of sodium carbonate solution to it.
it will again precipitate faint green copper carbonate
filter the precipitate and dry it
there ya go, now you have a quite pure copper carbonate from crude/impure copper carbonate
make some Thca crystals!
recrystallization at 2:45
Could you reduce bezoic acid to toluene, also could activated zinc dust successfully reduce benzoic acid to benzaldehyde?
+jared garden Ok turns out you could just reflux the benzoic acid in ether with LAH to benzyl alcohol then i suppose reduce the alcohol using activated zinc dust, but im still wondering if zinc could reduce a carboxylic acid to an aldehyde?
+jared garden no. You could go to the chloride (from the alcohol) and reduce that with zinc. With a caroxylic acid, you would just get the zinc carboxylate salt.
+mmmhorsesteaks Thanx
+jared garden you can get toluene at a hardware store you have to order benzoic acid why would you want to buy something online wait for it to come then spend money turning it into something you could have just bought and distilled.
Angelia Welch Because then you actually get to perform an experiment and observe as your compound slowly changes into another compound, its the journey not the destination. not to mention what if one day the hardware store blows up or shuts down or toluene is taken out of hardware store paint thinner or if like the apocalypse happens and for some reason you want some toluene to recrystallize the sulfur that you dug up over in Rotarua to mix with some charcoal and that sodium nitrate that you managed to extract from that pile of fermenting straw you've been pissing on for the last 6 months to make gun powder which you can use in your makeshift pipe gun to finally kill those cannibals who have been trying to catch you and eat your legs for the past couple weeks.
Metaphetamin plis
Benzoic acid is very annoying to separate if you don't have vaccum filtration
Seperti apa bikinnya dan apa aja yang di campur
Join yuk
Every time I see your homemade faucet I bust out laughing lol. I did the same thing for a friend in his garage many years ago and every time anyone would look at it the would die laughing & make fun of him for it. It's not esthetically pleasing but it does the job huh lol.
Bhsa Indonesia Pi ksian
Hi Yuni Jo
چگونه از قرص استامینوفن ساخارین جدا کنیم؟
I always wonder why you english ppl are calling Na Sodium stead of Natrium!
Why?
Sodium is the english language name but also the IUPAC international standard name: iupac.org/what-we-do/periodic-table-of-elements/
hi.
I have sent you an email
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Te ngarti ah
Dellet google 😨
If you want more subs edit more I went to sleep to your video sorry