Recrystallization | MIT Digital Lab Techniques Manual

[@Izaya_Orihara]

Open transcript >> toggle timestamp >> copy & paste to Word >> ctrl + F keywords >> done with ochem worksheet

[@sairamaritzacarhuayalalvar7645]

This is very useful in pandemic times, because we aren't allowed to go to the laboratories! thank you :D

[@vedmaburuxova68]

I had 2 lab courses simultaneously during 2 semesters of covid. We just had to put on a mask and get to it. Was horrible, couldn't see anything with the protective glasses fogging up haha

[@filmviewer7]

Anyone else here because of ochem class? XD

[@x0xxx007i]

me lol

[@twixxtwizz452]

Yes, and corona lol

[@mikkit876]

yup, even 3 years later lol

[@skiphoffenflaven8004]

I would assume that to be the case, in general.

[@97amani]

anyone doing organic chem assignments for pearson mastering chemistry? email me at [e-mail] (incentive provided)

[@micahkkipruto5336]

Learning ,it’s very educative and resourceful. As Virginia Union University student I recommend this for you too

[@chemistmcg]

don't forget to remove those boiling chips you added before allowing it to cool.

[@ethandriessen5565]

Oke this explains things very well and is very educative but for the love of all that's holy, please stop blasting that alarm audio, my poor ears.. It would also be appreciated if a reupload of this video with higher video resolution were released.

[@Fraidoon]

Thanos: Post the video his man: But sire! the quality Thanos: I said do it

[@prof.luizclaudio.barbosa]

Excelent video on recrystallization.

[@lssam100]

Thank you Mit , THANKS .

[@playingguitarorange]

THUMBS UP---IF you enjoyed the music accompanying the recrystallization.

[@eliseeng1709]

yesss

[@QueenofCool]

Why is it that the ideal solvent is insoluble in room temperature but soluble with the sample at boiling point?

[@AgonyGlyph]

You want all of the compound to dissolve in the solvent (= no crystals) at the point where the solvent would start to boil. But when you cool down the solvent the solubility decreases which leads to forming of compound crystals. When solution has cooled to room temperature you want all of your initial compound to be as crystals, and not dissolved in the solvent, for a maximum yield. Only the impurities should be dissolved in the solvent at room temperature.

[@AmlanRayasingh]

Henry law and roult law

[@اللهمربناانتثقتيورجائي]

Question : in the case of two solvent, what is the problem if I do first hot filteration for more purification if there are insoluble impurities suspended with my new copmound?

[@romanpaez4278]

This is Chemistry, I got in the wrong line of work. Is it to late to go back and will ths Instructor give me an add code for her class

[@chunkymonkey2782]

can someone explain more in depth why oiling out happens and what to do if it happens?

[@Skunkhunt_42]

Possible with any method, especially reverse additions. One possible cause of oiling out is that drops of the product solution are surrounded by the antisolvent, in which the solubility is very low, and this low solubility creates localized regions with very high supersaturation ratios. Many variables to consider here. Before mixing to the molecular level is achieved, the localized high supersaturation forces the product out of solution without allowing sufficient time for ordering of molecules to enable crystal development. The resulting oily particles have a tendency to clump together before the Occluded solvent migrates throughout the solution. As the mixture is aged, the oiled-out particles may transform into amorphous solids or become "crystalline" (with poor lattice structure)

[@2MinTz2]

chunkymonkey2782 If I understand correctly, oiling happens when the boiling point of the solvent exceed the melting point of the sample. So when sample is dissolve at boiling point of the solvent, the solution created would have the sample "oiled" out instead of crystallize out. If this happen, you should reselect your solvent...

[@RuthNaguaJ]

como lo cambio al español?? ayuda porfavor

[@thiennhinguyennguyen2456]

Có ai ở đây vì môn practice organic không?

[@ivarsandvik9838]

why are they talking in caps tho

[@TheDoctorRulesPSN]

Great audio

[@pedronuno8892]

do you know whose composer is the music at 10:57 from?

[@rainlover1964]

@@pedronuno8892 kzbin.info/www/bejne/q368dHiKr9-hedE

[@pedronuno8892]

@@rainlover1964 thanks, but I found it already :)

[@ikeotoyeuzorma5222]

Good luck

[@beegman27]

yogh is not Z

[@ElSqualito]

Choco bisettes

[@alexdupuy5617]

Ah ouais carrement

[@ElSqualito]

Ah oui mange moi la gestion

[@bombdon7957]

Thanks MIT, screw SDSU

[@subhendunayak]

Okay

[@MatanuskaHIGH]

Im here because I’m a stoner and want to perfect my THCA crystallization tech 🤷‍♂️🤣

[@shockhtize]

Thought this was how to make terp sauce...

[@AnaMartinez0222]

i only say.. metaaaaa

[@noopa5229]

dank memes

[@davidgamez-alvarez5701]

Y'all couldn't get a real actor>