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Recrystallization and Melting Point Analysis 

Professor Dave Explains
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Now that we have covered some important separation techniques, let's take a look at a purification technique. Sometimes a chemical reaction will produce a solid, which can precipitate from solution. But these crystals typically contain impurities from solution that were trapped in the lattice as it formed. After we isolate these crystals, we can purify them via recrystallization. This is where we dissolve them in a particular hot solvent that will then retain any impurities before cooling it down such that it can crystallize again. We will also learn how to assess the purity of our recrystallized product using melting point analysis. This is neat stuff!
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4 дек 2022

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Комментарии : 56   
@nathanmermilliod3135
@nathanmermilliod3135 Год назад
Perfect video and explanation of concepts, and just in time for my students’ lab practical on recrystallization. Thanks Professor Dave!
@23100Battlefield
@23100Battlefield Год назад
I had my lab on this three weeks ago! Wish Dave had this video earlier, you really have labs late in the term, it's our exam period rn
@cancan1231ify
@cancan1231ify Год назад
Hey, I have friends and roommates that work for Thermo Fischer scientific. What a fun coincidence that they sponsored one of my favorite RU-vidrs.
@thomaseddyson362
@thomaseddyson362 Год назад
Thank you. I always appreciate the effort you go to with your videos. Well presented with just enough of the required ephemera.
@martinarenzi4744
@martinarenzi4744 Год назад
Thank you Prof Dave! As always so precise and clear
@harrybrielmann189
@harrybrielmann189 Год назад
very complete! And I agree that trituration (forcing the solvent out by the addition of a less soluble solvent) often results in a less pure product.
@hananehanane3860
@hananehanane3860 Год назад
I hope to see more techniques explanation in your channel. Thanks Prof Dave
@eddielikesfish7114
@eddielikesfish7114 Год назад
i literally just learnt about this in chemistry lol. we are going to be making asprin with this method in january
@henna_nenna
@henna_nenna 6 месяцев назад
you are saving the life of every ochem college student thank you so much
@MSA_fansite
@MSA_fansite Год назад
I love you mr.dave you are really helping beyond imagination
@louisnemzer6801
@louisnemzer6801 Год назад
My favorite organic chemistry purification method!
@prixynealojado6998
@prixynealojado6998 8 месяцев назад
You're my hero, Professor Dave 🫶
@nicco-sixty
@nicco-sixty Год назад
Will you do more in-depth concepts in multivariable calculus, like the Jacobian matrix?
@vspqrv9784
@vspqrv9784 3 месяца назад
such a high quality video and explanation
@similosihlegqalisisa8211
@similosihlegqalisisa8211 11 месяцев назад
I'm subscribing now Prof❤❤❤
@Dylan-cv7kj
@Dylan-cv7kj Год назад
Science is so cool
@triple_gem_shining
@triple_gem_shining Год назад
Moon is flat tho . Lol jk
@ariiibaby05
@ariiibaby05 Год назад
Right
@markshort9098
@markshort9098 Год назад
Yes, yes it is
@Malthusia
@Malthusia Год назад
Ye
@milviodeleon4421
@milviodeleon4421 Год назад
Wow comments on. Good job 👍
@Dont_insult_people
@Dont_insult_people Год назад
Fascinating
@ansammkh1681
@ansammkh1681 Год назад
thank you
@TomasElizabeth
@TomasElizabeth 2 месяца назад
So super cool
@StephOnyia
@StephOnyia 8 месяцев назад
You are a pro 😮 Including the guy in the laboratory 😊
@rassimsimou1594
@rassimsimou1594 Год назад
Good
@gamingwithrksaver4868
@gamingwithrksaver4868 Год назад
We used to do these for derivative tests... and then match the m.p. to literature value to confirm the compound
@rozana4470
@rozana4470 Год назад
When are the other videos coming cause i start OC lab this week😭
@RevilHermes
@RevilHermes Год назад
I remember doing much simpler version with salt.
@missionsuccess6323
@missionsuccess6323 10 месяцев назад
. Synthesis of 2-Amino-4-(substituted-phenyl)-1, 3-thi- azole Derivatives
@TheCosmicGuy0111
@TheCosmicGuy0111 Год назад
Wowza
@chrisaltaawesome
@chrisaltaawesome Год назад
thank youuu
@krabre1848
@krabre1848 Год назад
hi
@enzoshii
@enzoshii 8 месяцев назад
Crystals did not form in our experiment. What could have gone wrong?
@WanderTheNomad
@WanderTheNomad Год назад
5:17 Why do we have to use the minimum amount of solvent? Is it just to avoid wasting it or something? Or is there another reason?
@keypo790
@keypo790 Год назад
Its because the experiments relies on Solubility Curve.
@user-qe8gy1zv2i
@user-qe8gy1zv2i 10 месяцев назад
its better to use the smallest amount of solvent to minimize the amount of material lost by retintion in the mother liqour
@harrybrielmann189
@harrybrielmann189 Год назад
it's ok if the impurity is insoluble, just filter it out while hot.
@harrybrielmann189
@harrybrielmann189 Год назад
oh you covered that, nice.
@judeboys6409
@judeboys6409 Год назад
This video reminds me of being a meth head in my 20s. Wouldn’t recommend it 😂. I used to “wash” it in acetone. To clean out impurities .. Have no clue what that was doing scientifically. But it sure made you higher 😅😮. Hey Dave. What would be the science of that lol ? You probably more an idea than I
@Linda-hn3bh
@Linda-hn3bh Год назад
👍😌
@tiptop1681
@tiptop1681 4 месяца назад
Finally i can do this with my meth. Thanks
@livingcodex9878
@livingcodex9878 Год назад
おはようございます
@-JA-
@-JA- Год назад
🙂👍
@worldsfinestsimp6421
@worldsfinestsimp6421 Год назад
TIGHT TIGHT TIGHT
@krabre1848
@krabre1848 Год назад
idk whats happening but cool
@krabre1848
@krabre1848 Год назад
omg i remember this in year 7
@desmond3828
@desmond3828 Год назад
immunology?!
@kevinxavier2986
@kevinxavier2986 Год назад
Komenke41
@DavidP089
@DavidP089 Год назад
2 million subs and your videos barely reach 10k views 🤔🤔🤔
@ProfessorDaveExplains
@ProfessorDaveExplains Год назад
Learn how educational channels work, sweetie.
@KasaJiso
@KasaJiso Год назад
First comment, day to of “do more flat earth vids they blew up.” Sorry not first I was too long to write the comment :(
@Gxlto
@Gxlto Год назад
Sorry man I dont think he will. It's kind of dead at this point. I hope he does more creationism debunking
@white_isnt_a_race2338
@white_isnt_a_race2338 Год назад
Educate me daddy
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