Organic Chemistry Lab Demo: Distillations

[s091511]

THX，i'M GOING TO DO ARRANGE THIS SET IN THE NEXT TUESDAY

[porterwake]

Little baby distillation.

[petalcharm]

Very helpful. Thank you.

[cyclestring]

taught me a lot! thanks! :)

[Bakugantsuvai1]

Thank you for the video it helps me understand for the seperation techniques part of my chemistry test.

[Kidwai03]

Doing Distillation tomorrow! Perfect video, thanks :D

[Reilly444]

My lab manual doesn't have any illustrations to go along with the text, which sucks because I'm a visual learner; this helped immensely. Thank you.

[baghdadi89]

I have this lab next week, but our quiz is on IR,UV-vis and Mass Spectroscopy :(

[Nighthawk7091]

Chemistry is for nerds.

[FuryApple]

Grease? I don't think so. Grease may made your compound contaminated.

[gallonofpcp]

Can you use this to make sweet sweet corn liquor?

[spotlightman1234]

@gallonofpcp Yes, but there are cheaper distillation methods.

[MrMaypole14]

If he pushes up his glasses one more time, I'm gonna scream!

[crudeoilsystems]

This was done well. The black background is a good idea..

[InfamousShogun]

I love you

[MATEOTL86]

to grease, or not to grease. that is the question.

[SaintWilliamIII]

Very nice explanation of the procedures as well as the reasoning behind them.

[Fullmetal392]

it would be a little more helpful if you put down the times at which each distillation is demonstrated. Great video besides that. :]

[collectivemind513]

7:47

lol'd

[Fullmetal392]

@collectivemind513 my coach did that all the time in wrestling.

then he would say, "I just hit puberty. Let's celebrate with pushups!"

[collectivemind513]

@Fullmetal392

lol'd more

[OnlyOneTreeHill8]

I have to do this in Chemistry tomorrow. So nervous about it

[TwentyFiveHour]

Man, this video's a lifesaver. Thanks!

[lilly8030]

very useful,clear,step wise demo,very cute instructor

[lilly8030]

very useful,clear,step wise demo.omg the instructor is very cute:-P

[BeauStinsonDotCom]

I need bigger glassware!, I'm trying to distill alot of "water".

[pelule02]

you inverts the tubing

[pangavamanos]

Wonderful demo! Thanks for taking the time. At the end you mentioned organic compounds... would and example of this be things like lavender oil or essential oils? It was not covered except at the end. of the vid.

Again great job

[mparsonage53]

SHAVE ARMS MAY CATCH FIRE!!!!!

[zackboomer]

I'm doing this tomorrow :/

[krazykanadian6]

In what situation would you want to be using a "3-bottle cow" as your recieving flask? What is trying to be achieved with this technique? different levels of purity or to isolate certain substances???

[98JMA]

@krazykanadian6

A cow would be used when you want to collect more that one fraction, but don't want to disconnect the receiving flask briefly and attach another - you simply twist the cow for a new small container for a new substance.

[slidersalpha]

my distillation kit can be screwed and has rubber joint, does this mean that i don't need grease?

[vmelkon]

For fractional distillation, do you need a vigreux column of different lengths depending on what liquids you are boiling or is the same 30 cm column used in ALL cases? How do you control temperature along that column? Perhaps a more complex glassware is needed for fine control.

[e1890814]

great videos. I never had chemistry labs before but with this kinda help anyone can do it. thanks for your help.

[e1890814]

great videos. I never had chemistry labs before but with this kinda help anyone can do it. thanks for your help.

[zrs89]

i can tell you are a genius!

[honeybunchickens]

Can I do this to a flammable content that contains two substances to get one substance out of it. theres methanol and acetone together. Im trying to take the methanol out. Can I do this procedure to separate them?

[nick11927]

brings back memories

[starkyliam]

Not many people like chemistry, but it's really cool. I enjoyed this video :)

[krazypunk50]

What was the lubrication for the ground glass joints?

[moxley88]

@krazypunk50 i think u use Vaseline, i know we used it for our experiments :)

[MariusSemeonOrtiz]

Wow, thanks for video explanation :)

[fugert]

dude this guys videos suck

[drgergens2]

VERY UNSAFE!!! You added your ethyl acetate but you didn't add a BOILING Chip to prevent BUMPING. Extremely unsafe!!!! Also you did not go over safeties! 1)never fill rbf more that 2/3rds full, 2) never heat a closed system, 3) never for get to add a boiling chip 4)never distilled to dryness. Glad to see you are where safety glasses. YOU"LL need them when your simple distillation set-up explodes in your face.

[MariusSemeonOrtiz]

@ drgergens2:

I understood points 1 & 3 you made. Please could you further explain points 2 & 4? For 2. I understand the risks involved in heating a closed system - pressure could build up and BAM glass in your face! To avoid this what you do? Open up the system to allow gas pressure to escape? If you do this however, won't you lose some of the desired products? For point 4. what is distilling to dryness?

Also, (this may be a stupid question) but won't boiling chips contaminate substances?

[freakin1random]

Bong. lol

[latkeeeeeeee]

dsfsdfsdf

[KittyRokher]

ok, i think i could set up this distillation set, but what should i put in the main flask. Should I use ethyl acetate like he said, or is there something better to use. Better yet, how do you make alcohol with this type of setup.

[purplemutantas]

@KittyRokher You don't make alcohol with this type of setup. Distillation just evaporates a liquid and condenses it back into a liquid. Distillation doesn't make anything. Alcohol is made by fermentation.

As far as what to put in the main flask. It all depends on what you want to distill.

[wrjamescom]

@purplemutantas Alcohol is made by fermentation. But while that's the end product for beer and wine, distilled spirits, be it whiskey, moonshine, etc. are just that, distilled! The video shows exactly the process used to extract the pure alcohol from the mash and make booze. Distillation doesn't make anything, it's used to extract one liquid from another with a different boiling point.

[bct1996]

AWESOME! This vid really helps wth my HW

[lilpolo20]

also, I would have never put a utility clamp on the condenser. Normally there is one clam on the neck of the RBF and then there is another clamp holding the take off adapter. other than that. it is a good video

[lilpolo20]

o yea and the thermometer in this distilation is too low. the bulb of the thermometer should be parellel to the stillhead and condenser opening. the bulb in this video is a little too low. meaning you will have an initial temp chance before the vapor even reaches the condenser.

[gunyolk55]

Hey man, nice video. Nice touch with the bibliographic info on the side.

[localbroadcast]

something about this guy pisses me off. k?

[KierstenKay]

Thank you so very much for this, my TA sucks!!!!

[scarmenl]

The water jacket creates a cooler surface for the vapor to return to liquid against.

The liquid from the water jacket does not get in the distillate because it has its own in an out points to direct the cooling liquid.

[maddclicker]

Water jacket is why.

[erikerik666]

I dont understand the why water from the faucet is not going into the collection flask?

[purplemutantas]

@erikerik666 Google liebig condenser. The wikipedia article that pops up will explain how the water jacket (liebig) condenser works.

[supimAndriy]

Thanks for this!

[chemicalenginerd]

extremely helpful ffor my students, thanks!

[RobotBadger]

Why use a glass thermometer? Can you not use an electronic one?

[MattyMatt761]

Loved the tip on using grease, I will for sure remember that.

[ptdecker]

What grease is used? Petroleum based (Vaseline)?  Something more neutral?

[melodyjoon]

thanks you so much...i always watch your videos before taking my organic chem practical ,it really helps :)

[astronalien]

Please wear a labcoat :P

[TAz69x]

The producers tried at first, but it interfered with the lighting and the setup, so they eventually settled on the best lighting option.

[kayouna]

no distialltion column ?! weird

[Tahmelapachme]

i thought you put on the water tubes before (!) adding the cooler to the apparature to prevent it from breaking whe you push on the tube ends.

still an interesting video :)

[odinchert]

he's way too nervous...especially for a PhD.

[hmqlostris]

If you are using proper ground-glass glassware (quickfit), the joints don't usually have to be greased.

[Yadgyu]

Did he add a boiling chip to that round bottom flask? He is going to get localized heating!!!

[lilpolo20]

boiling chip or stir bar will do the job

[01101101s01101101]

Thank you for all the Chemistry lab videos i love chemistry and these help me a lot :)

[OfDaHeeZy84]

thank god for posting this video. Thanks mate n Im ready for my distillation lab

[schroedingerfan]

thanks man i am starting my organic chemisty tomorrow morning that helped

[RanaRaethanaBonduHai]

excellent...!! Thank You

[HasibahMuslim]

i absolutely hate doing distillation they are sooo boring! Just last friday i had to do 2 distillations within 3 hours! arrghhh... u just have to stand there and watch it distilling soooo slow!

[agrippaviar]

...my dad got his face burned last sunday when the apparatus exploded thanks to a distraction, hes still in hospital i hate distillation too

[m1ke4252]

thanks so much!! this is a lot of help seeing it in a video!!

[iloveram]

Thanks a lot man. I have to take organic chem next semester.

[voon100]

Cool stuff. Thanks for sharing!

[crazyboy0602]

good stuff. i really want one of these.

heating mantles are SOOOO expensive.

[manadarkmagiciangirl]

thx 4 the lesson gr8 help;p

[jerrykim2]

Question: how much of the liquid are you supposed to vaporize?

[Kosztorys]

I'm training to be A scientific glassblower and know nothing about chemistry or how the glassware I make is used. This is GOLD!

[sandcrab132]

That's a very interesting vocation.

[nuca98]

lab coat?

[scivislab]

Believe me, we did try a lab coat, but the studio lights were so intense that our instructor shone like a fluorescent bulb, ruining the whole frame. We tried *three* different shirts until we decided to go with this very unprofessional-looking shirt, which worked the best with the lights.

[faradoidflask]

@scivislab Where did you get that thermometer adapter?

[ethyllithium]

Vacuum distillation is a much more commonly used technique to isolate organic compunds with high boiling points rather than steam distillation.

[ptdecker]

So, how about a 'video response' that illustrates vacuum distillation techniques?

[oOoxelAoOo]

Technically that is a vacuum distillation setup. Just attach a hose from a vacuum pump to the nipple on the elbow connecting the condenser to the round bottomed flask and off you go.

Also use vaseline for the ground glass fittings, his method of putting two dabs 180 degrees apart is over-complicating it, just a light smear will do it, just don't get it right on the bottom edge.

2 months late...but I hope that helps.

[lilpolo20]

all you do is attach a hose to the aspirator and attach it hose to the nipple on the takeoff adapter. In order to create suction though the aparatus has to be a closed system. therefor take a RBF and attach it to the bottom of the take off adapter. if the system is in a vaccum, the round bottom flask that was just attacked shouldn't be able to be moved.

hope this helps

[SymAmineC8H11N]

Keep them coming...

[slfudct]

Awesome. All the points of distillation are covered within 10 minutes. Thanks for this upload.

[scivislab]

We are glad you liked it!

[TheChemistSupreme]

@scivislab does fractional distillation seperate water and another liquid?????

[alisha1088]

I didnt realize I was logged in to my dad's youtube account, when I left the comment above.

I'm the one who has the exam tonight! so, thanks! =)

[sabupa]

I have my Ochem lab exam tonight! I'm glad you uploaded these videos. THey were fun to watch as well as a good review! thanks! =)