Solutions: Crash Course Chemistry #27
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- Опубликовано: 18 авг 2013
- 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.....
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
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!
Crash Course > Actual Chemistry Classes.
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?
molarity and molality. now I'm certain that scientists are just messing with us
Once again Hank, awesomeness! Thanks for all the great content and huge help over the years on academic topics.
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
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.
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.
you always do such a great job in these vids! thank you for this :)
under pressure... :-D I almost collapse at your flat jokes, Hank. Because I love flat jokes! :-D
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
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.
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.
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?
This vid really helped. Hopefully, its enough information for my End of course assessment tomorrow
Thank you so much! Your videos have helped me out so much!
Its awesome catching these videos just after release. It's like Hank is teaching me face to face :3
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.
4:15 best part...😂
The best part was when the video ended.
COOOOOL!!!!! These are excellently well made!!! Congratz :D
Go hank! Never stop making these!
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.
I just adore crash course
under pressure i love it you just made my day hank
THANK YOU FOR THE SUMMARY AT THE END!!!!!!!!!!
Amazing description.
Man crash course (cc) is great!!!!!!!!!!!!. I actually loved it
Thanks, I have a test tomorrow and I knew the crash course must have something
one of the best places to learn !!
because of u I started loving chemistry thanks a lot hank .............FROM INDIA
anybody so used to hearing his voice at 2x speed that normal speed sounds wierd?
I love the way he sang David Bowe ft Fred Mercuy's Under Pressure. So funny. Hank you're great.
Yay crash course ! dftba hank ... I love watching these
Thank you for captioning this video :)
Would you be able to make a video on intermolecular forces??
Finally, equilibrium! I was wondering when you were going to get around to it. It's HUUUGE in Chemistry.
Thanks for making these. My chemistry teacher sucks and well....can't teach so this was really helpful
Thanks for helping me study last minute
Thank you for mentioning one of my favorite songs
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...
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
Thank you for not using the other Bowie team up that lead to one of the most awkward of music videos ever.
I see. Thanks, that helps a bit and'll give me something to chew on.
Great vids by the way. Really interesting stuff.
love the "under pressure"
GENERALLY be PRECISE... isnt that an oxymoron?
I love you so much for that Queen and David Bowie reference
I love you, Hank
hank is the best thank u hank
I love this video and show it to all of my classes. Also, I love sushi. And Coke. The soda.
I want more of Hank's singing!!!
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.
Such a well supervised script.
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!
THIS HELPED ME A LOT. OMGGGGG I FEEL SMART LOL.
I'll one up you and say that great music in general doesn't get old.
I get far too much entertainment from watching these! :DDDDD
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?
I liked this video almost exclusively because of the Queen reference. Good on you Hank!!!
The bowie joke made me sad
+Jameson401 I Like your prof pic man
can you please do an episode on ionic bonding and covalent bonding please :)
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?
Video: *Explains everything*
Me: Can fish survive in seltzer water?
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 am currently watching this, the day before the AP Chemistry Exam, without any other form of "studying"
ha i bet youre in college now
This helps me
LOL!! Dalton's got Harry Potter's scar!!
Harry Potter died a century ago.
Hi, I was wondering how you set up your lighting for your videos? CrashCourse
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?
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.
Thanks so much
Have you done a crash course on Crimean War or is it in another video that you have done?
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.
your a talent!
Hey Hank, Are you planning on doing a Crash-Course for Physics?
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
Can we basic Chem teachers get a video about saturation levels, please? As a lesson supplement...
greart video for when your feeling down
2:55 "'I'll tangle [with] death if death wants me to.'"
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, 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.
Henry's law can also be expressed as s1/p1=s2/p2
How do you figure out the polarity of something and if it has the same as water?
The Bowie- Mercury joke got me..LOL
I love the crash courses... But this video made me crack up at the sheer confusion I experienced watching it.
4:11 Cool reference ;)
I like how the "cards" shake a bit.
which is more soluble a 100mg tablet in 250ml water or a 1000mg tablet in 250ml of water? if possible an explanation would be appreciated.
06:29 Why does the total solubility of a solution go up when there is an increase in temperature??
Please do Le Chatelier's principle!
Mercury and Bowie ref? Nice.
Every time I watch one of these I get flashbacks to AP chem like 10 years ago. Why do I put myself through it?
3:00 with CC on, FUGU looks like the word FOOD
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.