Extractions | Chemical processes | MCAT | Khan Academy

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Learn about how chemicals can be separated through acid-base extraction. By Angela Guerrero. . Created by Angela Guerrero.
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Опубликовано:

26 сен 2024

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Комментарии : 32

@jimmyproductions3021 3 года назад

You literally made so much sense that I finally understand the MCAT question in regards to extractions. Just to clarify I would use a weak base to tackle one of the acids if I have 2 acids?

@SweeeetLovex3 3 года назад

Yes

@ThePhronetic 10 лет назад

Great explanations. Much better than the other Khan Academy teachers, no offense to the others, of course. You're all better than the many horrible professors college kids pay thousands for!

@xtinesilva 7 лет назад

Clear explanation and clear writing!! Thank you so much!

@renski1792 8 лет назад

Wow!! Very helpful!! Thank you so much

@emmanuel_dean 3 года назад

I never understood this in college, and all it took was one video on studying for the MCAT and now I feel like I'm a master! Thank you

@paulkerrigan9857 10 лет назад

I'm incredibly impressed by how easy you write using a cursor, in cursive, no less! I expect you're using a tablet. Still, it's impressive! Nice video. Thanks.

@VoidHalo 7 лет назад

Probably uses a pen on a tablet device like Sal.

@leodecember6413 Год назад

Isn't aqueous phase at the top while organic phase at the bottom? Anything organic is denser than water. Particularly, DCM (dichloromethane) is organic solvent which is denser than water and obviously takes lower position in sep funnel.

@richiemd777 Год назад

Oil floats on water

@letsbereal0k 7 лет назад

Mild bases can't deprotonate weak acids but in this example (7:05) it can deprotonate acetic acid? Why?

@sennanna 6 лет назад

Although both have resonance structures in their conjugate bases, O bears the negative charge on acetate ion whereas C bears the negative charge on phenolate anion. Since O is more EN atom than C, acetate ion is more stable. More stable conjugate base means stronger acid.

@AwakenTofu 5 лет назад

Lmao just imagine recovering 1 substance from the waste container 😂 I rather just redo the original extraction Good video tho

@medicalminutia 9 месяцев назад

Hi, there are two audios overlapping at around 01:05. I think you might have edited it. It's impossible to make out what you say in that like 2-3 second window

@husseinAli-tq9gf 6 месяцев назад

Thank you so much now I understand

@ruffyatutube 7 лет назад

In your 1st example, are you starting out with a known mixture of two compounds you must separate, or do you take each individually, then mix them, and then separate - in which case, that would make little sense, right?

@pfeliciano4062 3 месяца назад

So, basically, NH2 is neutral, and we want to make it polar so it goes to the aqueous phase. It can do this by stealing hydrogen and reacting with H-Cl. The phenol's OH was neutral, and we want to make it polar, too. To do this, it needs to get deprotonated so it can enter the aqueous phase.