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Column chromatography | Chemical processes | MCAT | Khan Academy

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Learn how to separate chemicals using column chromatography. By Angela Guerrero. . Created by Angela Guerrero. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/gas-chromatography?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/separations-purifications/v/calculating-retention-factors-for-tlc?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
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Text Comments (37)
sebastian cuello (5 months ago)
Orgo lab is a torture
Zahid Ramirez (8 months ago)
Why the sudden change to a robot at 0:07? Haha
zari khan (1 year ago)
Is Mobile phase or solvent contain that mixture that need to get separate??
Puppy Pi (1 year ago)
Oh holy cow, your voice is amazing! :'D And the video is really great content too! :DD I wish I could learn all the things from you :">
TALESofGAMERSxx (1 year ago)
Useless video, clearly a video for grade 10 or 11 students. Column Chromatography had much more depth and complexity to it, and have every step explained + polarity would have been ideal. This is clearly not aimed for Med students. Lackluster !
Alexandre Lima (3 months ago)
As a... chemistry olympiad's student, I actually liked it. Very useful to my context '-'
Fucked Up Society (3 months ago)
It doesnt say anywhere that it is aimed AT med students. You might not need grade 10 or 11 column chromatography courses but a comprehensive reading course before saying dumb shit might be suited.
Gaurav Singh (1 year ago)
TALESofGAMERSxx This is a simple video to understand the concept. Grow up dumbass
Miller CH3 (1 year ago)
stopcock ( ͡° ͜ʖ ͡°)
Gaius Daniel (2 years ago)
thank you
Mido Sala (3 years ago)
Thank you, really helpful.
Shenelle Taylor (3 years ago)
thank you
you tube (1 year ago)
Shenelle Taylor I luv u
Chris Nyholm (3 years ago)
im way too immature for the word stopcock lol
Lynice Barnes (5 months ago)
lol especially when she said "ramming it against the stopcock"
Dilini Jayasuriya (8 months ago)
Samarth Bhatnagar (3 years ago)
why exactly do we need the sand?
vedant (2 years ago)
Samarth Bhatnagar to stop the liquid. From reaching cotton
Dinesh Ramgi (3 years ago)
It is good for child.
rojafx (3 years ago)
1:01 you sure you know how to spell clock right?
Eric H (2 years ago)
rojafx this is why kids shouldnt be fucking teachers, sal needs to get off his rich ass and help us
Ibrahim Fataw (3 years ago)
Stopcock not clock +rojafx
Mary Gwozdz (4 years ago)
It would have been nice to know how the polarities of the molecules lead to them being separated as they ran through all of these different materials.
Ian Steinke (1 year ago)
I think you have it a bit backwards
Ian Steinke (1 year ago)
emlmm88 (2 years ago)
apolar molecules you mean.
Juice (4 years ago)
Sound m9
Conjii i (4 years ago)
Thanks, that was really helpful.
Abdul Azim (4 years ago)
HAHAHAHAHAHA softcock 3:15
Ntr Htp (4 years ago)
It would have been nice for you to mention what type of solvents are normally used, and the specific reasons for using each. Great video nonetheless.
Tyler Cantrell (4 years ago)
What is the purpose of adding the sand?
KevDawg673 (4 years ago)
The sand also acts as a bed support for the column bed, supporting whatever resin/gel is being used for purification. This is why she stresses making sure it winds up horizontal; a crooked bed support will cause a crooked column and give poor purification, which she demonstrated.
Ntr Htp (4 years ago)
The sand is used primarily for the purpose of filtration.
Great video.
kachingaaa (5 years ago)
Aw thank you so much, I'm a medical student but I'm in my 1st year and I'm excited to use this channel's videos for lab :D I also love her voice
Eric H (2 years ago)
kachingaaa hook me up with your journals and notes so i can be a sucessful surgeon, ill send u my contact information

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