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

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

@FROPDESAI

9 жыл бұрын

fairycatLJT You made my day!

@ryanlu7576

8 жыл бұрын

+fairycatLJT LOL

@christopherjeffers5684

8 жыл бұрын

+fairycatLJT INSTEAD OF A PROBLEM! I AM A WINNER

@queensaharaice7376

8 жыл бұрын

+fairycatLJT Wow that's good!!

@lucygeronimo8050

7 жыл бұрын

Well someone's famous.....

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.

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

2:14-- The question of all Chemistry

Crash Course > Actual Chemistry Classes.

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!

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 жыл бұрын

Fiiiiit

@corneliuspildershmidt

8 жыл бұрын

+Nat Cat He really is great, isnt he?

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

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

@resikin

4 жыл бұрын

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

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

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.

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

@chinchu725

5 жыл бұрын

really?

@mikeoxlong3894

5 жыл бұрын

Is your life that boring?

@shakibzz

5 жыл бұрын

@@mikeoxlong3894 you must be a fun person

@shakibzz

5 жыл бұрын

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

@skye.s2515

4 жыл бұрын

Dude same

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 жыл бұрын

Jajajajaja

@resikin

4 жыл бұрын

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

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

@Lalola123

9 жыл бұрын

its hillariouss!! haha

@thedondo100

9 жыл бұрын

lol I just did it

@aarontompkins6713

9 жыл бұрын

Lol thats the only way i can watch anymore

@Andrew-Graham

9 жыл бұрын

lol it does! You made my night !

@McG_

9 жыл бұрын

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

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

@resikin

4 жыл бұрын

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

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

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

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

8 жыл бұрын

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

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

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

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

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.

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

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

@hannahsummers7956

4 жыл бұрын

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

Go hank! Never stop making these!

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

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

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

GENERALLY be PRECISE... isnt that an oxymoron?

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

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

4:15 best part...😂

@resikin

4 жыл бұрын

The best part was when the video ended.

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

under pressure i love it you just made my day hank

I just adore crash course

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

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!

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 жыл бұрын

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

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

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

@hannahsummers7956

4 жыл бұрын

ha i bet youre in college now

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

Thank you for captioning this video :)

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

Amazing description.

I love you, Hank

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

one of the best places to learn !!

Thank you for mentioning one of my favorite songs

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

The bowie joke made me sad

@corneliuspildershmidt

8 жыл бұрын

+Jameson401 I Like your prof pic man

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

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...

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

Thanks for helping me study last minute

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

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

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

@corneliuspildershmidt

8 жыл бұрын

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

@eshamukhopadhyay7127

7 жыл бұрын

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

@saberatahseen8587

7 жыл бұрын

We have it in middle school :(

@corneliuspildershmidt

7 жыл бұрын

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

@vijaybhai8282

6 жыл бұрын

qwerasd fix qwerasd zucchini qsertyasdfgzxcweettyusddfgzxc

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.

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

hank is the best thank u hank

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

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.

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

love the "under pressure"

The intro made me breathe manually.

I want more of Hank's singing!!!

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

@resikin

4 жыл бұрын

Harry Potter died a century ago.

Such a well supervised script.

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

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

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

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.

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 жыл бұрын

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 жыл бұрын

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

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

Hi guys, I have a question. If KCl has stronger ion-ion bond, why it will break(dissolve) in water and form weaker ion dipole bond?

Crash course video at 2x speed equals extra crash course

I want to ask something. supposed I want to make a phosphate solution form KH2PO4 anhydrous. to a phosphate solution of 300mg/L should I just ad 0.3 gram of KH2PO4 into a liter of DI water or I have to do some calculation?

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.

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

Thanks so much

4:11 Cool reference ;)

This helps me

Hey Hank, Are you planning on doing a Crash-Course for Physics?

Can we basic Chem teachers get a video about saturation levels, please? As a lesson supplement...

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

Have you done a crash course on Crimean War or is it in another video that you have done?

your a talent!

The Bowie- Mercury joke got me..LOL

I was literally unable to finish this video without pausing it, opening up another youtube window, and listening to Under Pressure. RIP David Bowie, RIP Freddie Mercury.

How do you figure out the polarity of something and if it has the same as water?

greart video for when your feeling down

Hank, you little beauty!!!!!

I like how the "cards" shake a bit.

There are many questions that lack solutions, but the most important question with a solution is "Will it Blend?".

Every time I watch one of these I get flashbacks to AP chem like 10 years ago. Why do I put myself through it?

Mercury and Bowie ref? Nice.

Question! Lets say you had a mixture of salt, sand, and sugar. Then you followed these steps: 1) Add water (20ml) to the mixture and stir until dissolved. 2) Using a filter apparatus and a beaker, filter the salt/sugar solution from the sand. Would there be any way to separate the salt from the sugar? Please be very specific in your reply, thanks in advance!

@user-fj3ff6jp1k

8 жыл бұрын

+bluebirdlifestyle First evaporate water. Add ethanol to the salt and sugar then only the sugar will be dissolved in the ethanol. Put the solution in a fine sieve and u will get the solid salt on the sieve. Evaporate ethanol from the solution and u get the solid sugar!

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.

Please yes!