Solutions: Crash Course Chemistry #27

Подписаться 16 млн

Просмотров 1,4 млн

50% 1

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. All that plus Henry's Law and why Coke = Burps.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
--
TABLE OF CONTENTS
Molarity, Molality, and Mass Percent 1:34
Polar Solvents Dissolve Polar Solutes 2:21
Nonpolar Solvents Dissolve Nonpolar Solutes 2:21
Henry's Law 5:15
Coke=Burps 4:00
--
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Instagram - / thecrashcourse
CC Kids: / crashcoursekids

Опубликовано:

18 авг 2013

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 542

@crashcourse 4 года назад

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

@fairycat23 9 лет назад

If you're ever feeling down, remember: you are a solution.

@FROPDESAI 9 лет назад

fairycatLJT You made my day!

@ryanlu7576 8 лет назад

+fairycatLJT LOL

@christopherjeffers5684 8 лет назад

+fairycatLJT INSTEAD OF A PROBLEM! I AM A WINNER

@queensaharaice7376 8 лет назад

+fairycatLJT Wow that's good!!

@lucygeronimo8050 7 лет назад

Well someone's famous.....

@assmane999 9 лет назад

3:10 - That girl seems to be super-psyched that her date is going into epileptic shock. It's like things were super awkward and she was praying for a miracle to end the night prematurely.

@garmadoon9472 5 лет назад

Hank:And who’s made mostly of water? Me: ... Me:Aquaman?

@AtticusEdwards 10 лет назад

2:14-- The question of all Chemistry

@nattcattt 9 лет назад

Loving these crash course videos. I have to take a chem assessment to be placed into a college chem class and I haven't taken chem for over a year so this was great.

@charliebroc1 9 лет назад

Fiiiiit

@corneliuspildershmidt 8 лет назад

+Nat Cat He really is great, isnt he?

@hobbitron101 9 лет назад

its around 4:30am, im cramming for an midterm at 8:00am and omg, i lost it at "Under Pressure" hahahah love these videos,! they're sooooo helpful!

@guyonacomputer1261 9 лет назад

Crash Course > Actual Chemistry Classes.

@donovanlucibello6420 5 лет назад

Once again Hank, awesomeness! Thanks for all the great content and huge help over the years on academic topics.

@leilacooper785 5 лет назад

I haven't even finished the video and I'm so glad I found this. Revising from the textbook given from school was just boring and this has actually done such an amazing job at making me interested in the subject. And yes, the Freddie Mercury and David Bowie reference is why I'm commenting.

@caleborg5688 5 лет назад

molarity and molality. now I'm certain that scientists are just messing with us

@PerceiveInfinity 9 лет назад

Quick, and, frankly, totally unrelated question: Where does Hank get all those amazing tees?

@resikin 4 года назад

Quick, and frankly, totally unrelated question, don’t you have any other things to worry about. Get a life.

@-AnweshaDas- 6 лет назад

you always do such a great job in these vids! thank you for this :)

@SafadosAteus 8 лет назад

I couldn't pay a lot of attention after the Bowie/Mercury joke due to laughter! LoL! 😂😂😂😂

@chinchu725 5 лет назад

really?

@mikeoxlong3894 5 лет назад

Is your life that boring?

@shakibzz 5 лет назад

@@mikeoxlong3894 you must be a fun person

@shakibzz 5 лет назад

😂😂😂 I loved it so much!! It was perfect

@skye.s2515 4 года назад

Dude same

@wentouttojuggle 10 лет назад

under pressure... :-D I almost collapse at your flat jokes, Hank. Because I love flat jokes! :-D

@emmadavern3877 9 лет назад

These are undoubtedly the best chem vids ever! Really helped...

@corneliuspildershmidt 8 лет назад

This made me ACE my honors exam! Just this video! thanks Hank!!!!!!

@resikin 4 года назад

Do you live in Sri Lanka or something, how easy are your exams?

@ProfessorJiji 11 лет назад

Its awesome catching these videos just after release. It's like Hank is teaching me face to face :3

@ayushbhardwaj2708 7 лет назад

4:15 best part...😂

@resikin 4 года назад

The best part was when the video ended.

@rossnoice402 10 лет назад

Hank - awesome job on all videos. I have a suggestion for a future project. The fire service and fires in general. While a noble institution the fire service is under educated in chemistry and physics. Serious injuries and death occur each year. UL and NIST are helping however a down to earth crash course in redox actions how to predict and protect yourself from extreme reactions and still be alive to watch your show might make a useful project. Cheers.

@kristenanneee 10 лет назад

Thank you so much! Your videos have helped me out so much!

@timmymcdee7 11 лет назад

Go hank! Never stop making these!

@DanielC01000100 11 лет назад

COOOOOL!!!!! These are excellently well made!!! Congratz :D

@zman8164 7 лет назад

This vid really helped. Hopefully, its enough information for my End of course assessment tomorrow

@brycefergusson8573 9 лет назад

Why is it that my favorite parts of this show are always when the thought bubble illustrates catastrophe? (3:10) Also, why is this woman flailing her arms around maniacally against trippy techno music? Shouldn't she be getting help for her epileptic first date? (I'm beginning to see why this is so entertaining for me . . .)

@brycefergusson8573 9 лет назад

+Bryce “Bryce no. 6” Fergusson PS: ". . . paralysis, ehh suffocation, maybe some death." - Hank Green

@randomhistory9924 7 лет назад

In my country, I learned that formula like Pv=Rtn, which (if you say it aloud) it sounds like "pavo ratón" ("turkey mouse", in English). It is funny. Or I guess so. Nevermind.

@RetroMaster64 4 года назад

Jajajajaja

@resikin 4 года назад

Go back to your country, you ain’t welcome here.

@oumayma7803 7 лет назад

I just adore crash course

@flamedragon07 4 года назад

I love the way he sang David Bowe ft Fred Mercuy's Under Pressure. So funny. Hank you're great.

@velanmanivannan9981 4 года назад

THANK YOU FOR THE SUMMARY AT THE END!!!!!!!!!!

@R0ugesGallery 11 лет назад

under pressure i love it you just made my day hank

@micheleday4665 8 лет назад

I've got my Solutions Final in like a half hour. Thanks for helping me study!!!

@hannahsummers7956 4 года назад

youre probably in college now-- wow, how the years fly by.

@moderadoranderson 4 года назад

I love you, Hank

@meganisturtlecameron 11 лет назад

Yay crash course ! dftba hank ... I love watching these

@carolinetherrien3400 8 лет назад

Thank you for captioning this video :)

@offlinehelper3415 6 лет назад

Man crash course (cc) is great!!!!!!!!!!!!. I actually loved it

@nishatmaryam8465 7 лет назад

one of the best places to learn !!

@adityaharekrishna 5 лет назад

Amazing description.

@jpbostonian 6 лет назад

Thanks, I have a test tomorrow and I knew the crash course must have something

@yourdaddy6655 7 лет назад

because of u I started loving chemistry thanks a lot hank .............FROM INDIA

@BecauseWeCanTheChannel 11 лет назад

Thank you for mentioning one of my favorite songs

@andrewwojcik21 11 лет назад

Finally, equilibrium! I was wondering when you were going to get around to it. It's HUUUGE in Chemistry.

@lostusaslambus 11 лет назад

I get far too much entertainment from watching these! :DDDDD

@fartzinwind 10 лет назад

Thank you for not using the other Bowie team up that lead to one of the most awkward of music videos ever.

@DragcoDavid 9 лет назад

Ahh, I can watch these at 1.25x speed, and it's actually the right information density to really enjoy them. I love this new variable video speed feature!

@xaustinx15 9 лет назад

lol, has anyone tried playing at half speed? Hilarious, he sounds like he is drunk.

@Lalola123 9 лет назад

its hillariouss!! haha

@thedondo100 9 лет назад

lol I just did it

@aarontompkins6713 9 лет назад

Lol thats the only way i can watch anymore

@Andrew-Graham 9 лет назад

lol it does! You made my night !

@McG_ 9 лет назад

Austin Hennessey you tried the half speed because he talks so damn fast.

@ombricshalazar3869 4 года назад

anybody so used to hearing his voice at 2x speed that normal speed sounds wierd?

@thetreeboy 11 лет назад

I see. Thanks, that helps a bit and'll give me something to chew on. Great vids by the way. Really interesting stuff.

@janelleadana7757 8 лет назад

hank is the best thank u hank

@FaithInJesusOnlynotbyWorks 8 лет назад

I love you so much for that Queen and David Bowie reference

@mattmarkarian8820 6 лет назад

I love this video and show it to all of my classes. Also, I love sushi. And Coke. The soda.

@hannahsummers7956 4 года назад

Video: *Explains everything* Me: Can fish survive in seltzer water?

@apoorva3062 10 лет назад

LOL!! Dalton's got Harry Potter's scar!!

@resikin 4 года назад

Harry Potter died a century ago.

@irenecobb1829 8 лет назад

LOL at the Harry Potter lightning bolt scar at 5:21

@JamsMinecraft 8 лет назад

The bowie joke made me sad

@corneliuspildershmidt 8 лет назад

+Jameson401 I Like your prof pic man

@Crystalvampire66 11 лет назад

Hank, you are not old. As far as I know you don't complain about aches and pains or being old. And besides, you don't have to be old to like an old song, especially a really good one.

@Emzoe986 6 лет назад

Thanks for making these. My chemistry teacher sucks and well....can't teach so this was really helpful

@jintoki9735 7 лет назад

THIS HELPED ME A LOT. OMGGGGG I FEEL SMART LOL.

@tevincoles5716 8 лет назад

GENERALLY be PRECISE... isnt that an oxymoron?

@madiadani7008 8 лет назад

Thanks for helping me study last minute

@SkywalkerAni 11 лет назад

I'll one up you and say that great music in general doesn't get old.

@hixsongarren 11 лет назад

I liked this video almost exclusively because of the Queen reference. Good on you Hank!!!

@gregoryyang8988 4 года назад

The intro made me breathe manually.

@julijahmeljak6755 9 лет назад

I want more of Hank's singing!!!

@GuillePuerto 11 лет назад

Such a well supervised script.

@mercyritz1311 9 лет назад

Solvent is not always the component that's present in greater amount. Solvent is the constituent substance which has the same state of aggregation as the solution. In syrup, there's 40% water and 60% sugar, but solvent in syrup solution is water. But generally, the component in greater amount is the solvent.

@deannadurben1117 9 лет назад

love the "under pressure"

@TestNeko 9 лет назад

Oh, I tried measuring carbon dioxide concentrations in soda by mass! If only I'd thought to use pressure, maybe my mentos rocket car would've performed better with a superior fuel...

@lordjesus49 7 лет назад

The Bowie- Mercury joke got me..LOL

@shatikaz 6 лет назад

I love the crash courses... But this video made me crack up at the sheer confusion I experienced watching it.

@joresvanwensen922 10 лет назад

4:11 Cool reference ;)

@RobKinneySouthpaw 11 лет назад

I believe it has to do with the attraction of the ions being too strong for water's polarity to overcome without expending too much energy. That may also explain why many ionic compounds have a variable solubility depending on temperature. Some need energy added to dissolve. Some even need energy removed from the system to dissolve. Of course, I've been wrong before.

@SH-og8pr 6 лет назад

your a talent!

@endimion17 11 лет назад

"Oxygen" is a chemical element. Its chemical symbol is O. Uppercase, always. At standard conditions (room temperature and pressure) it comes in diatomic molecules, O2, called "oxygen gas" in English. At high enough temperatures, the molecules break down into atoms. Ozone is O3. It is still oxygen as a chemical element, but a different chemical substance.

@weaamayesh5529 7 лет назад

Would you be able to make a video on intermolecular forces??

@otacon1024 8 лет назад

It wasn't covered in the video, but one of you probably knows. I've seen solutions described by "normality", for example 1.5 N H2SO4, but I never really understood it. How do I figure out molarity or mass percent from that?

@the.invincible.9542 5 лет назад

I learner this yesterday Normality =Molarity × n-factor . n-factor of H2SO4 is 2. So M=N/2=1.5/2=0.75Mol/L

@adityabharadwaj9372 2 года назад

This helps me

@ewwxaca 5 лет назад

Thanks so much

@poojanaik4643 10 лет назад

I am currently watching this, the day before the AP Chemistry Exam, without any other form of "studying"

@hannahsummers7956 4 года назад

ha i bet youre in college now

@tuxino 11 лет назад

Another common measurement for the ratio between solvent and solute is volume percent. You can see it on just about any bottle containing an alcoholic beverage.

@Livy191 8 лет назад

it's 7:30am and i have my apchem mock exam in 3 1/2 hours thank u hank

@corneliuspildershmidt 8 лет назад

+OAHall Ah the feels of college, at least it was a mock doe

@eshamukhopadhyay7127 8 лет назад

u guys r having this stuff in college?? thts so cool ... we ovr here hav it in highskul :(

@saberatahseen8587 7 лет назад

We have it in middle school :(

@corneliuspildershmidt 7 лет назад

sabera tahseen so do we, and also in high school. It's all about how advanced it is!

@vijaybhai8282 6 лет назад

qwerasd fix qwerasd zucchini qsertyasdfgzxcweettyusddfgzxc

@hrperformance 5 лет назад

Why does Dalton have a Harry Potter scar!?? haha. Awsome videos crash course :)

@powerwh33ls 8 лет назад

Question:: what causes a brain freeze? What is actually happening that makes it hurt? If you continued you drink something cold very fast and ignore the pain could it harm you?

@timnnz 7 лет назад

There are nerves in your head that run close to the roof of your mouth that when they get cold, such as eating ice cream fast, send out a pain like signal. No ignoring this won't hurt you, it just won't be very pleasant.

@high-functioningsociopath3560 6 лет назад

Just press your thumb to the roof of your mouth to warm it up a little; that should stop it hurting.

@LigerZero1985 11 лет назад

as a chem degree holder, i enjoy your videos alot. probably because i finally understand what smart guy is saying lol

@bolb6000commenterlol 6 лет назад

2:55 "'I'll tangle [with] death if death wants me to.'"

@yolodaswagg 9 лет назад

Crash course video at 2x speed equals extra crash course

@imanstuart 11 лет назад

I was stubling across the internet and i came across a chem book that was banned for being to dangerous. If you want to find it look up the golden book of chemistry. It is not under copyright so there are free pdfs of it all over.

@daycash5072 8 лет назад

greart video for when your feeling down

@Georgia.Cherri 11 лет назад

can you please do an episode on ionic bonding and covalent bonding please :)

@hoosierhiver 11 лет назад

2 Part Question:1) How come when I pull a beer out of the freezer and it's not yet frozen the can seems weaker, 2) How come it suddenly freezes after I take it out and open it. ( I call that a glacial)

@huwburt 10 лет назад

Hank, you little beauty!!!!!

@t3hmaniac 11 лет назад

Solutions do wierd things to freezing points. Most notably, salt water solutions have a lower freezing point, so salt is added to defrost the roads. With all the chemicals (alcohol, sugar, CO2) in beer, it's freezing point in a pressurised container is probably a lot lower than regular water, if it freezes after taking it out and opening it it's probably the Carbon Dioxide preventing it from forming a full big crystal that is beer ice.

@mattvw9287 11 лет назад

I think it's important to note though that the CO2 is also regulated by the equation H2CO3 ---> H2O + CO2

@superlemus2 11 лет назад

Original pressure in the can was 5 times atmospheric, so it's not a surprise that if it's released it expands about 5 times its original volume.

@stardude692001 11 лет назад

It would be interesting to see the ratio of people that associate the into to under pressure vs, ice ice baby.

@xthe_moonx 11 лет назад

when it gets too hot, trout just head to the bottom of lakes to get to the colder water with all that yummy oxygen. rivers are usually colder then lakes so they dont necessarily need to get deeper.