Recrystallization

Recrystallization is a powerful method for purifying solid compounds. In this video, I give a brief overview of the technique and demonstrate how to carry out a recrystallization of an unknown organic compound. Purification of the compound is then confirmed by TLC.

This experiment is based on a procedure described in the CHEM 216 Lab Manual, which was prepared by several members of the organic chemistry faculty at Cal Poly.

[matthewyim]

Watching these videos is the most fun I've had in online school this quarter, thanks for your and the other professors' effort with making these virtual labs!

[mennaallahmo.]

I'm Egyptian and l study faculty of science
This video helps me a lot
Thanks sir.

[Diesel_United_LLC]

Amazing chemistry lesson on recrystallization. Thank you for helping me understand this topic.

[Itsnotzeee]

Thank you! I study pharmacy and I was struggling to understand organic chem labs bc of online school but you made it very clear! Thank you🤍

[rahulsaha]

Thank you so much for this video. It helped me a lot

[mastercheif]

Nice video. Can I ask why you didn't filter the sample after adding the hot solvent and dissolving you product to see if there are any insoluble impurities to remove before carrying out the rest of the recrystallization?

[amerhamdi]

How extracion of cbd oil from hemp plant by use ethanol only as solvent and purefication the product ..Thank you

[maroxG]

Very good video! Could you, if it is not a problem, explain the procedure? I have kclo3 obtained from sodium hypochlorite! Thank you in advance!

[allenhonaker]

Does the crystalization pattern extend down to the atomic and sub atomic level?

[BillAnt]

At 10:00 just because a substance dissolves at room temperature, it doesn't mean that it can't be recrystallized by cooling it, or crashing it out with another solvent.

[Aldertonartco]

Isn’t the DCM called the stationary phase? Can I ask what TLC plate you used? it doesn’t look like you used a glass silica sprayed plate….

[Aldertonartco]

Can i ask, as an amateur chemist, what software that was that you could draw the box around it and connect the molecules? Im an artist and have been looking for ways to incorporate chemistry into my work….this would be REALLY USEFUL!

[Aldertonartco]

Can I ask what those frame clamps are called and where can I get one? Or do people make them? You don’t usually see chemtubers have the frames - they usually struggle like me with portable clamps. I take it they go through the bench and are secured from below the worktop?

[Aldertonartco]

Yeah this does make sense. The big bag I have glows…as do bottles of LSD iv coveted in the past. Obviously not on their own I mean under UV…I bought a torch for this reason!

[chivoprobles]

What will hopen if I hit epson salt en in petrolium and alcohol

[_satyaindra]

Please help me 🙏
I'm confused in the distillation method,
Exactly when taking pure substances
I deliberately used a sample of medicine that had 5 ingredients in it, after I finished extracting it, then I filtered it and got the residue & filtrate.
But I'm confused about how to separate the purity of these substances using the Distillation method, even though I have recorded the boiling points of the 5 substances, here are the boiling points:
Substance A > Boiling point: 400 °C
Substance B > Boiling point: 260°C
Substance C > Boiling Point: 379 °C
Substance D > Boiling point: 520 °C
Substance E > Boiling point: 232 °C
For example, if I want to get the purity of substance B, how do I do it ?? 🤔🤔🤔

Who knows, someone might be able to tell, 🙏

[Aldertonartco]

Would you not logically look up the solubilities of each compound in each solvent in the literature and do an excel spreadsheet?

[chivoprobles]

How is cristals method cant be recristalizte atgent two add more efedrina sodium camflued Coleman flued red phosforus sulfuric acid ramdom fertilizer whit out a littium

[carmenhernandezmorales]

To complicated you make it difficult to comprehend