Solutions: Crash Course Chemistry #27
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- Опубликовано: 26 сен 2024
- 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
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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
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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.
fairycatLJT You made my day!
+fairycatLJT LOL
+fairycatLJT INSTEAD OF A PROBLEM! I AM A WINNER
+fairycatLJT Wow that's good!!
Well someone's famous.....
Hank:And who’s made mostly of water?
Me: ...
Me:Aquaman?
2:14-- The question of all Chemistry
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.
Fiiiiit
+Nat Cat He really is great, isnt he?
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!
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.
Crash Course > Actual Chemistry Classes.
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.
molarity and molality. now I'm certain that scientists are just messing with us
I couldn't pay a lot of attention after the Bowie/Mercury joke due to laughter! LoL! 😂😂😂😂
really?
Is your life that boring?
@@mikeoxlong3894 you must be a fun person
😂😂😂 I loved it so much!! It was perfect
Dude same
Quick, and, frankly, totally unrelated question: Where does Hank get all those amazing tees?
Quick, and frankly, totally unrelated question, don’t you have any other things to worry about. Get a life.
This made me ACE my honors exam! Just this video! thanks Hank!!!!!!
Do you live in Sri Lanka or something, how easy are your exams?
under pressure... :-D I almost collapse at your flat jokes, Hank. Because I love flat jokes! :-D
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.
Jajajajaja
Go back to your country, you ain’t welcome here.
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 . . .)
+Bryce “Bryce no. 6” Fergusson PS: ". . . paralysis, ehh suffocation, maybe some death." - Hank Green
you always do such a great job in these vids! thank you for this :)
4:15 best part...😂
The best part was when the video ended.
lol, has anyone tried playing at half speed? Hilarious, he sounds like he is drunk.
its hillariouss!! haha
lol I just did it
Lol thats the only way i can watch anymore
lol it does! You made my night !
Austin Hennessey you tried the half speed because he talks so damn fast.
anybody so used to hearing his voice at 2x speed that normal speed sounds wierd?
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.
I love the way he sang David Bowe ft Fred Mercuy's Under Pressure. So funny. Hank you're great.
The intro made me breathe manually.
I've got my Solutions Final in like a half hour. Thanks for helping me study!!!
youre probably in college now--
wow, how the years fly by.
Video: *Explains everything*
Me: Can fish survive in seltzer water?
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?
I learner this yesterday Normality =Molarity × n-factor . n-factor of H2SO4 is 2. So M=N/2=1.5/2=0.75Mol/L
Don't blink, you'll miss the video
I am currently watching this, the day before the AP Chemistry Exam, without any other form of "studying"
ha i bet youre in college now
GENERALLY be PRECISE... isnt that an oxymoron?
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.
LOL!! Dalton's got Harry Potter's scar!!
Harry Potter died a century ago.
I love you, Hank
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!
The bowie joke made me sad
+Jameson401 I Like your prof pic man
it's 7:30am and i have my apchem mock exam in 3 1/2 hours thank u hank
+OAHall Ah the feels of college, at least it was a mock doe
u guys r having this stuff in college?? thts so cool ... we ovr here hav it in highskul :(
We have it in middle school :(
sabera tahseen so do we, and also in high school. It's all about how advanced it is!
qwerasd fix
qwerasd zucchini
qsertyasdfgzxcweettyusddfgzxc
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?
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.
Just press your thumb to the roof of your mouth to warm it up a little; that should stop it hurting.
I love this video and show it to all of my classes. Also, I love sushi. And Coke. The soda.
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.
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...
Its awesome catching these videos just after release. It's like Hank is teaching me face to face :3
Neither Queen's or Bowie's music will ever get old
LOL at the Harry Potter lightning bolt scar at 5:21
Crash course video at 2x speed equals extra crash course
This vid really helped. Hopefully, its enough information for my End of course assessment tomorrow
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.
Thanks, I have a test tomorrow and I knew the crash course must have something
because of u I started loving chemistry thanks a lot hank .............FROM INDIA
Finally, equilibrium! I was wondering when you were going to get around to it. It's HUUUGE in Chemistry.
Thank you so much! Your videos have helped me out so much!
I liked this video almost exclusively because of the Queen reference. Good on you Hank!!!
Thank you for mentioning one of my favorite songs
under pressure i love it you just made my day hank
I'll one up you and say that great music in general doesn't get old.
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.
I love you so much for that Queen and David Bowie reference
These are undoubtedly the best chem vids ever! Really helped...
Man crash course (cc) is great!!!!!!!!!!!!. I actually loved it
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.
"Under Pressure" - finally a song for people my age (even old than Hank Green)!
Why stop at Physics. I would love for Hank to do a Crash-Course on all the sciences. Biology, Astronomy, Physics, Meteorology.
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.
Hank told me to think about breathing and I couldn't help but to take a deep breath.
I'm liking this just because he sang under pressure
Thank you for not using the other Bowie team up that lead to one of the most awkward of music videos ever.
I love the crash courses... But this video made me crack up at the sheer confusion I experienced watching it.
Go hank! Never stop making these!
Thanks for helping me study last minute
THANK YOU FOR THE SUMMARY AT THE END!!!!!!!!!!
I think it's important to note though that the CO2 is also regulated by the equation
H2CO3 ---> H2O + CO2
Can we basic Chem teachers get a video about saturation levels, please? As a lesson supplement...
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!
+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!
hank is the best thank u hank
I just adore crash course
I want more of Hank's singing!!!
I like how the "cards" shake a bit.
We should *generally* be as *precise* as possible!
Yay crash course ! dftba hank ... I love watching these
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.
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.
I'm not old, but I still got the reference. Just because I'm young doesn't mean I don't appreciate things before my generation! :)
Amazing description.
Would you be able to make a video on intermolecular forces??
COOOOOL!!!!! These are excellently well made!!! Congratz :D
Playing this at 0.5 speed is the greatest thing ever
It would be interesting to see the ratio of people that associate the into to under pressure vs, ice ice baby.
Well, the little bit of the oil that might dissolve in the water and the little bit of water that might dissolve in the oil would be the solutes. But unmixed oil and water is neither.
Add some alcohol or soap, and you then can make a suspension, but that is completely another thing.
2:55 "'I'll tangle [with] death if death wants me to.'"
Sci Show cover a very variety of scientific fields but it doesn't systematically teach you the important concepts you need to grasp for each subject, which is what Hank and John are doing with Crash Course. So there may very well be a Crash Course Physics in the future, although Hank once said that he may not be the best person to teach it.
as a chem degree holder, i enjoy your videos alot. probably because i finally understand what smart guy is saying lol
one of the best places to learn !!
Mercury and Bowie ref? Nice.
Such a well supervised script.
There are many questions that lack solutions, but the most important question with a solution is "Will it Blend?".
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?
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)
These are great because my chemistry teacher has a really thick Puerto Rican accent and I can hardly tell what he's saying.
DAVID BOWIE AND QUEEN!!! awesomeness
3:00 with CC on, FUGU looks like the word FOOD
OH MY GOD the "Under Pressure" joke. HANK