This is one of my earlier videos, before I got all of my audio issues worked out. Use the volume knob or headphones! I also have newer recrystallization video on my channel with better audio and animations... check it out!
But how do I know how slowly to decrease the temperature? I mean, I have to put it in the freezer eventually and I'm worried that when I transfer the solvent from a cold water bath to the freezer that there is too much of a temperature gradient for the purist possible product.
Great video! Very easy to understand. I have been curious about FAST cooling of a PURE substance, and can't seem to find any information anywhere... What might be expected to happen? My best guess is that more solvent than usual might get trapped in the lattice structure, but that's as far as I can figure. Could anybody help shed some light on this for me? Or at least point me in the right direction to figure this out myself
+Cody Grant more solvent inclusion - maybe. Smaller, poorly shaped crystals - definitely. The classic inorganic example is glass vs quartz. Rapid cooling of silica gives an amorphous solid with very different properties than one cooled very slowly to get a highly ordered structure.
Hi Bahera! I'm glad you found it helpful. This is one of my first videos ever. I have posted MANY more since! Please take a look at myTH-cam channel (ChemSurvival) and consider telling your friends and subscribing!
My pleasure to help! If you are working on recrystallization, you might also want to check out my in-lab demonstration video th-cam.com/video/Q1nKbx05IbM/w-d-xo.html
+Tittoo Mal At the end of the process, the system cools, so overall, no it is not an endothermic process. what's more important is that it is endergonic overall, meaning that free energy of the system is lower in the final state than the initial. This is why slow cooling is best, because we want thermodynamics in control of the crystallization.
No the scheme is exothermic. Overall heat is released from the system into the universe. The reaction is *exergonic*. Products free energy < starting materials free energy. I.e week bonds are being broken and stronger bonds being formed. The reverse reaction would be endothermic I.e endergonic.
The impurity stays in the mother liqour,, the solution above the recrystallized material. That is usually removed by filtration which leaves behind only the purified solid
Extremely helpful, I was struggling with this concept before watching this. Thanks
Excellent vid, I finally understand the principles of recrystallization properly!
Excellent job sir....it is of great help for researchers...... thank you so much sir
Great work explaining this! Thanks heaps!
This is one of my earlier videos, before I got all of my audio issues worked out. Use the volume knob or headphones! I also have newer recrystallization video on my channel with better audio and animations... check it out!
This is 10 year late but this explanation was fantastic. Thank you!
It's never too late to receive a compliment like that! Thanks for watching the channel!
This is made very simple!
Another GREAT video ! thanks!
Good job and thanks for your work
THANKS SO MUCH FOR YOUR SIMPLE USEFUL EXPLAINING
Thank you for all the videos!
But how do I know how slowly to decrease the temperature? I mean, I have to put it in the freezer eventually and I'm worried that when I transfer the solvent from a cold water bath to the freezer that there is too much of a temperature gradient for the purist possible product.
Great Video, Thank You!
THANK YOU A MILLION!!!!!!!!! :)))))
awesome video! helped a lot!
could anyone please tell me how these video tutorials can be made? I mean which software is used to make these video tutorials?
awesome animation, it helped a lot
THANKSSSS you made this simple:)
Great video! Very easy to understand.
I have been curious about FAST cooling of a PURE substance, and can't seem to find any information anywhere... What might be expected to happen?
My best guess is that more solvent than usual might get trapped in the lattice structure, but that's as far as I can figure. Could anybody help shed some light on this for me? Or at least point me in the right direction to figure this out myself
+Cody Grant more solvent inclusion - maybe. Smaller, poorly shaped crystals - definitely. The classic inorganic example is glass vs quartz. Rapid cooling of silica gives an amorphous solid with very different properties than one cooled very slowly to get a highly ordered structure.
Very good.
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Hi Bahera! I'm glad you found it helpful. This is one of my first videos ever. I have posted MANY more since! Please take a look at myTH-cam channel (ChemSurvival) and consider telling your friends and subscribing!
Ty I now understand this better
Thank you!
Thank you once again
Omg amazing thank u !!
so after the impurities get separated from the pure substance do we have to do some sort of filtration or separation to get a 100% pure substance
Yes. Typically vacuum filtration.
thanks so much!!
Thanks 💕
Thank you so much
My pleasure to help! If you are working on recrystallization, you might also want to check out my in-lab demonstration video th-cam.com/video/Q1nKbx05IbM/w-d-xo.html
Would this be considered as endothermic (since heat is being added)?
+Tittoo Mal At the end of the process, the system cools, so overall, no it is not an endothermic process. what's more important is that it is endergonic overall, meaning that free energy of the system is lower in the final state than the initial. This is why slow cooling is best, because we want thermodynamics in control of the crystallization.
No the scheme is exothermic. Overall heat is released from the system into the universe. The reaction is *exergonic*. Products free energy < starting materials free energy. I.e week bonds are being broken and stronger bonds being formed. The reverse reaction would be endothermic I.e endergonic.
Thank you🌈
now I understand thanks
Check out my newer video on this topic!
Melting Point Depression Explained
very nice
What causes recrystallization? In energy
so, what precipitates out of solution?
Ivan Duck the solute
My pleasure. I hope they help! There are many more in development. Please subscribe and come back often to see what is new!
ChemSurvival
Audio is too low
chemistry made easy hear
is this called simple distillation?
No. But you can view my short video on simple distillation here: th-cam.com/video/T4eIc_v-SrI/w-d-xo.htmlsi=L-yLbxljLcAmgXaR
My question is, where does the impurity go to?
The impurity stays in the mother liqour,, the solution above the recrystallized material. That is usually removed by filtration which leaves behind only the purified solid
@@ChemSurvival Wow thank you so much.. I was a bit confused there💯
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to bad i can't hear it.
speak up!
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