UMNOrganicChemistry

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@rtttrt76 3 ай бұрын

Cleaver milf

@jaysphilosophy1951 4 ай бұрын

What the fuck is the point of this video?

@chasharris1976 4 ай бұрын

So how do you dispose of the liquid hazardous waste.

@luischaves2469 5 ай бұрын

Where are the packed material? You need a packed material where liquid-vapour equilibrium happens.

@Gascoigne1 5 ай бұрын

tuqa gang

@marcelalopez311 10 ай бұрын

Wow, would be interesting how is now the lab. Without hunger games effects...

@jacksonharris424 11 ай бұрын

should eric be allowed in the lab??

@adams6412 11 ай бұрын

put this video back in private waste of 3 mins ill never get back thx

@boilshifter1350 Жыл бұрын

How do u know the sodium bicarbonate would be on bottom layer

@JoeScottakaEpsitec Жыл бұрын

Gloves?!?!

@josephboro2218 Жыл бұрын

Am bachelor analytical chemistry I will would wish to work in an international research institute to enhance my analytical chemistry skills

@tpankratov Жыл бұрын

Why does the operator show the stopcock and not the meniscus?!

@johnnewman3221 Жыл бұрын

what is the name of that liquid and solid sample. how is it made

@stavjfhssf7054 Жыл бұрын

So in other words you're still going to have the drying reagent clumped at the bottom, the one originally put, but gradually the ones you continue to add, you want to make those are swirling right?

@espltdm155 Жыл бұрын

no gloves…?

@Crazyjn Жыл бұрын

Your carelessness around that needle is freaking me out…🤷🏻‍♂️💯😆

@salehchem4376 Жыл бұрын

If I have solid sample containing components, can I use any solvent to dissolve it? Or I have to use only the same mobile phase as solvent to dissolved sample? Another case, if must use same mobile phase, but my sample can not dissolve, here, please I need solution to this problem. can I use any solvent? thank you alot

@salehchem4376 Жыл бұрын

thank you so much. Is there standard to use silica gel in column, I mean if my sample a little bit like (0.01 gram), how much of silica gel use here? in contrast, if I have a lot of samples such as (1 gram or more), here, how much of silica gel have to use? I mean is there ratio from silica gel to sample to use in column, please tell me

@salehchem4376 Жыл бұрын

thank you. If I used wet packing of silica gel to column (slurry), here, can I use any solvent for silica gel until reached slurried, or same mobile phase or must use only hexane.

@linhtrinh9549 Жыл бұрын

Thank you so much this was very helpful!

@sanchiluthra489 Жыл бұрын

How much silica was taken in 15 ml solvent? What's the proper ratio of silica gel to the solvent that should be maintained?

@almche8978 Жыл бұрын

Good question. Plz, how amount of silica to sample? and what is solvent? Is it the same mobile phase or any solvent?

@fans_der_wiener_austria Жыл бұрын

Great video!

@j.chrismcgaugh5124 Жыл бұрын

Thank you VERY MUCH Dr. Wissinger for posting this! I'm leading a lab on this tomorrow. Thank you for your super clear directions! :)

@CrazeCreativesHQ 2 жыл бұрын

Here from breaking bad . thanks for your explanation

@clarkporodavid3608 2 жыл бұрын

What solvent do I use for the mobile phase? Is it going to be thesame solvent I used in extracting my plant material?

@C4pungMaster Жыл бұрын

A year late... But You need to figure it out by trial and error, through literation, or educated guess. Your goal is to get your material dissolved but separated during the column/elution. If you use the extraction solvent, most of the time you will get terrible separation. To figure out what eluent combination is best, try to do Thin Layer Chromatography tests in a series of polarity (example: from 10:1 hex:EA to 1:2 ratio) and see the separations. Use the solvent with the best separation and Rf of your target compounds

@stavrinalalounta6366 2 жыл бұрын

thank you ! great video , I have a question though , let's say that we have two liquids that we want to separate , so we should have one component which has a high partition coefficient and for the other component should have a smaller value for the partition coefficient ? how is K related to solubility ? thanks!!

@eyausoj2065 2 жыл бұрын

Thank you, I can finally dehydrate my organic fruit juices

@jheadley635 Жыл бұрын

Ey noooo

@Brumbrumauto 2 жыл бұрын

You said first youd use Brine or aqueous sodium chloride for drying and then max sulfite or calcium chloride? Which statement is right? Why would an aqueous chloride dry the phase? Or why would you use it before? You said 2 times drying I dindt understand that point, the rest was very informative to me. thanks you already.

@GnosisMan50 2 жыл бұрын

She knows! She also has a caring way of imparting her knowledge. I'm the new lab coordinator to a biomedical eng dept. so I need to know this. My dept provides me with this info, but I like to get it from other places as well so thanks.

@ross6883 2 жыл бұрын

breaking bad anyone?

@keepgoing6630 2 жыл бұрын

Good introduction. Can we put the filter paper into the liquid media in the flask after filtration?

@kenethphampham3907 2 жыл бұрын

The video sound is pretty good, beyond my imagination

@marox3G 2 жыл бұрын

Very good video! Could you if it is not a problem to explain the process of purification and recrystallization of kclo3 obtained from sodium hypochlorite! Thank you in advance!