Extractions | Analytic Technique in Organic Chemistry

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Extractions | Analytic Technique in Organic Chemistry

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Instructor: Dave Carlson
Analytical Techniques Part 4 : Extraction
Explanation of what extraction is and an example running through the process.

Пікірлер: 92

@dorothyotogbolu6485 6 жыл бұрын

if you getting ready to take the MCAT, you should be watching this videos. I cant believe they are free. Awesome videos!

@PremedHQ 4 жыл бұрын

Thank you! I am glad you found them helpful!

@Preposter 2 жыл бұрын

No other video goes over extractions better than this one. I've been searching for this all over the place. It's crazy how most chemistry oriented channels don't even cover this at all. Good job. This basically saved me.

@ExplosiousKneesiusMaximus 3 жыл бұрын

Man, if my professor made the effort to lecture the way that you do, the grade/confidence situation for the entire section would be drastically different. Don't ever stop publishing, you have no idea how helpful your content is.

@dragonflyjones4611 6 жыл бұрын

I love this channel after 1 full day of watching these video my score went from 502 to 505

@PremedHQ 4 жыл бұрын

Excellent work!

@SJ-qf2tz 6 жыл бұрын

This was so much better than the Khan Academy video thank you so much .

@PremedHQ 4 жыл бұрын

Hahaha thank you! It's all love here!

@leledeedmon9484 7 ай бұрын

Beautiful video, even 8 years later; thank you so much

@vikcheban923 4 жыл бұрын

You truly have the gift of teaching. Explained so well that I didn't feel like I had to memorize anything. I actually understand the procedure and expected what you were going to say before you said it. Same with other vids. GBU!

@PremedHQ 4 жыл бұрын

Thank you! Please tell your peers about our channel :)

@elainetorrese7641 2 жыл бұрын

WOW!! Phenomenal presentation!! I was pulling my hair out trying to figure this out and you summed it up like it was nothing!! Kudos to you & thank you!!

@imosdefinite 2 жыл бұрын

I don't think you know how nice of a speaking voice you have compared to all other KZfaqrs trying to teach (i.e. khan academy), honestly refreshing. thank youuu

@zulucharlie5244 4 жыл бұрын

This was an outstanding tutorial. Great teaching presentation; clear, concise, and well-delivered.

@PremedHQ 4 жыл бұрын

Thank you!

@mooshedpotato Жыл бұрын

thank youuuuuuu. I have been watching all of these over the weekend, I am a big picture learner and these have been so helpful !!!

@amandaduggan8676 6 жыл бұрын

You are a fantastic teacher! I'm not sure why your videos don't get more views!

@mercyk6064 6 жыл бұрын

Amanda Williamson I am so stressed out that he is in medical school and has a brain tumor 😞😞... his videos are keeping me from going insane ....

@dorothyotogbolu6485 6 жыл бұрын

me too

@PremedHQ 4 жыл бұрын

Thank you! Please share this channel with your classmates :)

@AquaticLogic 8 жыл бұрын

So well explained. I wish I saw the before all my OChem labs.

@PremedHQ 4 жыл бұрын

Thank you so much!

@chemist7908 6 жыл бұрын

This video is absolutely phenomenal

@PremedHQ 4 жыл бұрын

Thank you!

@yansirreaviles5036 3 жыл бұрын

I am 9 days out from my MCAT and had not been able to understand this concept. Today, I finally did. Thank you so much for this video!!

@kingpin1118 3 жыл бұрын

Spent my week doing caustic washes at work, and I actually understand the chemistry of what's going on. Thanks!

@abigailskoda8958 11 ай бұрын

I'm still really early in chemistry and don't even know the absolute basics but I think I still learned from this because the explanations in this video are laid out so simply.

@chenoavega8185 Жыл бұрын

Your video is amazing. You have made me understand this better than my chemistry lab professor and any other youtube video has. Thank you

@ashlimartin1611 3 жыл бұрын

I am very grateful for this channel! I wish I could give you a big hug! Thank you!

@audreycruel4333 4 жыл бұрын

i kept getting extraction questions wrong on my FL and this just expanded my brain. thank you!!!

@PremedHQ 4 жыл бұрын

Thank you! Please tell your peers about our channel :)

@sarahsalahuddin7361 2 жыл бұрын

this makes SO MUCH SENSE! Thank you!

@user-ik3er9yg3f 6 ай бұрын

Amazing explanation, thank you so much 🤩🤩

@alexsmith2840 4 жыл бұрын

You honestly make studying for the MCAT alot easier, I wish I would have known about you the first time I took the test.

@nnekaude 8 жыл бұрын

Great explanation!

@PremedHQ 4 жыл бұрын

Thank you!

@tunneltrance 6 жыл бұрын

be careful, the organic layer can sink to the bottom if its denser then water. So it's not really a rule of thumb that Organic = On top

@jacquelinezanders683 5 жыл бұрын

^^ yup

@Jake-tz6ye 4 жыл бұрын

beyond the scope of the MCAT but yes. I believe the main one to watch out for is DCM solvent

@allaalbonijim2748 8 жыл бұрын

Thank you SO much, very clear!!

@PremedHQ 4 жыл бұрын

Glad to hear it! You're welcome!

@kalkidanberhanu7708 4 жыл бұрын

best video! thanks for your help.

@PremedHQ 4 жыл бұрын

You're welcome! Glad you enjoyed it :)

@SnorlaxNaps 6 жыл бұрын

This is very helpful thank you so much!

@PremedHQ 4 жыл бұрын

You're very welcome!

@jocelynjchan 4 жыл бұрын

This Ochem playlist is super helpful! Just wondering, in the example where the strong acid in the organic mixture, is reacted with the weak base (NaHCO3) extraction agent - why do we choose to react it with the weak base agent as opposed to the strong base agent?

@zachvrobel2478 3 жыл бұрын

Great video thank you

@mahsaomrani9365 5 жыл бұрын

very helpful video and great explanation! thank you

@PremedHQ 4 жыл бұрын

I'm glad you found it helpful! Thanks!

@adrianvirgo1988 6 жыл бұрын

Thank you!!!! Great explanation

@PremedHQ 4 жыл бұрын

You're welcome! :)

@syedibadullah1661 6 жыл бұрын

very nice and clear approach.

@PremedHQ 4 жыл бұрын

Thank you!

@harigjoka4094 2 жыл бұрын

Thanks for your help

@npm1811 3 жыл бұрын

While it’s true that most organic solvents are less dense than water and will sit on top, it is always worthwhile checking the density of your solvent beforehand, for example, DCM and chloroform (which are extremely common solvents) are more dense than water so will sink to the bottom.

@VeritasEtAequitas 4 жыл бұрын

When separating, how do you avoid leaving some aqueous behind or catching some organic? Stop just before the boundary, catch and discard boundary in a new flask, then run the next step?

@gangakani8907 Жыл бұрын

Explain about interfering and noninterfering radicals

@kudosdc 2 жыл бұрын

Organic solvents do not always rise to the top. There are a number of common solvents that are denser than water.

@friedchicken892 3 жыл бұрын

Im wondering why we took out the base before the weak acid

@harveenkaur4684 5 жыл бұрын

so helpful! thank you!

@PremedHQ 4 жыл бұрын

You're welcome!

@ForPropertyInvestors 2 жыл бұрын

Does tempertature come into extraction techniques? ie.e freezing and or boiling!

@USHANLAKMALPunchihewa 6 жыл бұрын

Nice explantion. Thank you very much sir..

@PremedHQ 4 жыл бұрын

You're welcome!

@thechiralkid6349 4 жыл бұрын

Ordinary alcohols do not act as acids or as bases in water. A phenol would work as your weak acid but not an ordinary water-insoluble alcohol.

@atikna52 4 жыл бұрын

What I don't understand is that an amide is polar regardless of it's charge, right? So why would it be found in the organic phase if it doesn't have a charge?

@vijaybaldawa 4 жыл бұрын

Beautifully explained Sir, plz explain how further purification of the amino base aqueous phase to get pure

@vijaybaldawa 4 жыл бұрын

Sir, as u said strong acid is used to seperate amine, but instead after adding aquos NAHCO3& removing it from solution can we add NAOH solution to remove weak acid, keeping the amine with solvent & then distilling it from the solvent. Bcoz my organic mixture is nicotine, Petro ether, one weak acid & one strong acid. I want nicotine to seperated. Plz reply & oblige. Actually highly impressed by ur explaination. Plz answer sir

@jakkaashok667 3 жыл бұрын

Good explanation thank you sir....

@sasayed9936 6 жыл бұрын

What is the purpose of the non-reactive diethyl ether?

@thecorndawgg 4 жыл бұрын

In the organic layer, how is it non-polar if there is a carboxylic acid?

@user-wz8hm3cc6m 6 жыл бұрын

Very clary explained, thank you!

@PremedHQ 4 жыл бұрын

You're welcome!

@rinasyafinazrazali2134 3 жыл бұрын

u help me a lot!! thanks

@gangakani8907 Жыл бұрын

Supper sir

@gaurav889 6 жыл бұрын

Aren't carboxylic acids weak acids?

@srin6718 6 жыл бұрын

Stronger than alcohol in this context.

@USHANLAKMALPunchihewa 6 жыл бұрын

Compared to inorganic acid , it is a weak acid. But in organic it is a strong acid..

@syedibadullah1661 6 жыл бұрын

weak acid but strong than alcohols and phenols.

@mercyk6064 6 жыл бұрын

Thank you!!!

@PremedHQ 4 жыл бұрын

You're welcome!!!

@nehap2751 4 жыл бұрын

but a carboxylic acid is WEAK not strong

@triple_gem_shining 7 ай бұрын

Carboxylic acid is a weak acid, but regardless good video

@dragonflyjones4611 6 жыл бұрын

I love U

@PremedHQ 4 жыл бұрын

It's all love here :D

@blinkybit 6 ай бұрын

Wrong. 'organic' layers do not always rise to the top. Also, using 'oil' as an analogy is also dumb. Many organic solvents have nothing to do with oils.

@elmosgay 6 жыл бұрын

Cant even watch the whole video. Too many wrong statements. Extraction is not based on acidity and basicity. Extraction is based on polarity. ( However, an ACID BASE EXTRACTION, is based on both the polarities, as well as the acid base properties of the analytes) Organic layer doesn't always rise to the top! The position of the layers are based on densities. I.e. Methylene Chloride (organic layer) is more dense than water, so it will be below the aqueous layer usually(unless aqueous is heavily saturated with dense compounds like bromine). Please fix this, and idk about the rest of the video, i can't watch, i'm already cringing.

@dianesinghroy 6 жыл бұрын

Kevin Muthima agreed, however he is teaching "quick and dirty tricks" to get you through the MCATs efficiently. They want to see you understand trends and concepts. Don't hyper focus get too lost in the details. I'm a biochemist and worked in a lab for many years before writing the MCATs and found the biochem questions the most frustrating to do because I was coming with way more knowledge then the MCATs expected me to have. It would bother me that they used the wrong technique to measure something, or even outdated lab lingo. What I found helped was to step back, keep the big picture in mind, and ask myself what concept or trend are they testing. Knowing all the little nuances and details may only give one extra point here and there. But getting lost in the details and wasting time could cost you a whole passage. Recognizing when to apply these quick tricks (which is 90% of the time) to get the right answer and quickly moving on to the next question, is what's key.

@PremedHQ 4 жыл бұрын

@@dianesinghroy Thank you Diane :)

@raymartin3346 3 жыл бұрын

Liquid extraction is based on different solubility of material between two immiscible solvents