Recrystallization and Melting Point Analysis
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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Пікірлер: 56
Perfect video and explanation of concepts, and just in time for my students’ lab practical on recrystallization. Thanks Professor Dave!
@23100Battlefield
Жыл бұрын
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
Thank you. I always appreciate the effort you go to with your videos. Well presented with just enough of the required ephemera.
I hope to see more techniques explanation in your channel. Thanks Prof Dave
Thank you Prof Dave! As always so precise and clear
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.
Hey, I have friends and roommates that work for Thermo Fischer scientific. What a fun coincidence that they sponsored one of my favorite KZreadrs.
I love you mr.dave you are really helping beyond imagination
Will you do more in-depth concepts in multivariable calculus, like the Jacobian matrix?
My favorite organic chemistry purification method!
You're my hero, Professor Dave 🫶
i literally just learnt about this in chemistry lol. we are going to be making asprin with this method in january
such a high quality video and explanation
Science is so cool
@triple_gem_shining
Жыл бұрын
Moon is flat tho . Lol jk
@ariiibaby05
Жыл бұрын
Right
@markshort9098
Жыл бұрын
Yes, yes it is
@Malthusia
Жыл бұрын
Ye
you are saving the life of every ochem college student thank you so much
I'm subscribing now Prof❤❤❤
thank you
When are the other videos coming cause i start OC lab this week😭
Fascinating
So super cool
Wow comments on. Good job 👍
We used to do these for derivative tests... and then match the m.p. to literature value to confirm the compound
. Synthesis of 2-Amino-4-(substituted-phenyl)-1, 3-thi- azole Derivatives
I remember doing much simpler version with salt.
Good
You are a pro 😮 Including the guy in the laboratory 😊
Crystals did not form in our experiment. What could have gone wrong?
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
Жыл бұрын
Its because the experiments relies on Solubility Curve.
@user-qe8gy1zv2i
9 ай бұрын
its better to use the smallest amount of solvent to minimize the amount of material lost by retintion in the mother liqour
Wowza
hi
thank youuu
it's ok if the impurity is insoluble, just filter it out while hot.
@harrybrielmann189
Жыл бұрын
oh you covered that, nice.
👍😌
おはようございます
🙂👍
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
immunology?!
idk whats happening but cool
@krabre1848
Жыл бұрын
omg i remember this in year 7
Finally i can do this with my meth. Thanks
TIGHT TIGHT TIGHT
Komenke41
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
Жыл бұрын
Sorry man I dont think he will. It's kind of dead at this point. I hope he does more creationism debunking
2 million subs and your videos barely reach 10k views 🤔🤔🤔
@ProfessorDaveExplains
Жыл бұрын
Learn how educational channels work, sweetie.
Educate me daddy