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
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.
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.
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 . . .)
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.
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.
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?
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!
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.
"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.
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.
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.
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...
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.
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.
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.
Air as we know it is not a solution, it is a mixture . When sugar or even oxygen dissolves in liquid water there is an enthalpy change . There is no such energy change when oxygen gas is mixed with nitrogen gas. So it is just a mixture. The kinetic molecular theory of gases assumes this (elastic collisions , with only kinetic energy involved) . Non-interacting gases (like carbon dioxide and methane) can be separated by density in a centrifuge .
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.
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 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)
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!
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.
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.
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.
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
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?
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!
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
Once again Hank, awesomeness! Thanks for all the great content and huge help over the years on academic topics.
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?
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
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
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.
you always do such a great job in these vids! thank you for this :)
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.
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.
I love the way he sang David Bowe ft Fred Mercuy's Under Pressure. So funny. Hank you're great.
LOL at the Harry Potter lightning bolt scar at 5:21
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
anybody so used to hearing his voice at 2x speed that normal speed sounds wierd?
4:15 best part...😂
The best part was when the video ended.
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.
The intro made me breathe manually.
I love you, Hank
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
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
because of u I started loving chemistry thanks a lot hank .............FROM INDIA
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!
Video: *Explains everything*
Me: Can fish survive in seltzer water?
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 get far too much entertainment from watching these! :DDDDD
Crash course video at 2x speed equals extra crash course
I love this video and show it to all of my classes. Also, I love sushi. And Coke. The soda.
Crash course biology would be good too!
I liked this video almost exclusively because of the Queen reference. Good on you Hank!!!
Don't blink, you'll miss the video
I'll one up you and say that great music in general doesn't get old.
LOL!! Dalton's got Harry Potter's scar!!
Harry Potter died a century ago.
"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.
Its awesome catching these videos just after release. It's like Hank is teaching me face to face :3
Man crash course (cc) is great!!!!!!!!!!!!. I actually loved it
The bowie joke made me sad
+Jameson401 I Like your prof pic man
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.
This vid really helped. Hopefully, its enough information for my End of course assessment tomorrow
These are undoubtedly the best chem vids ever! Really helped...
Thanks, I have a test tomorrow and I knew the crash course must have something
Yay crash course ! dftba hank ... I love watching these
Finally, equilibrium! I was wondering when you were going to get around to it. It's HUUUGE in Chemistry.
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.
under pressure i love it you just made my day hank
Go hank! Never stop making these!
COOOOOL!!!!! These are excellently well made!!! Congratz :D
I love you so much for that Queen and David Bowie reference
THANK YOU FOR THE SUMMARY AT THE END!!!!!!!!!!
Thank you so much! Your videos have helped me out so much!
GENERALLY be PRECISE... isnt that an oxymoron?
Why stop at Physics. I would love for Hank to do a Crash-Course on all the sciences. Biology, Astronomy, Physics, Meteorology.
Thank you for not using the other Bowie team up that lead to one of the most awkward of music videos ever.
Neither Queen's or Bowie's music will ever get old
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...
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.
I just adore crash course
"Under Pressure" - finally a song for people my age (even old than Hank Green)!
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.
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.
Air as we know it is not a solution, it is a mixture . When sugar or even oxygen dissolves in liquid water there is an enthalpy change . There is no such energy change when oxygen gas is mixed with nitrogen gas. So it is just a mixture. The kinetic molecular theory of gases assumes this (elastic collisions , with only kinetic energy involved) . Non-interacting gases (like carbon dioxide and methane) can be separated by density in a centrifuge .
as a chem degree holder, i enjoy your videos alot. probably because i finally understand what smart guy is saying lol
Thank you for captioning this video :)
Thanks for helping me study last minute
Thank you for mentioning one of my favorite songs
one of the best places to learn !!
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 the crash courses... But this video made me crack up at the sheer confusion I experienced watching it.
Amazing description.
I think it's important to note though that the CO2 is also regulated by the equation
H2CO3 ---> H2O + CO2
Hank told me to think about breathing and I couldn't help but to take a deep breath.
The Bowie- Mercury joke got me..LOL
hank is the best thank u hank
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 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)
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!
THIS HELPED ME A LOT. OMGGGGG I FEEL SMART LOL.
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 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.
2:55 "'I'll tangle [with] death if death wants me to.'"
So, whenever someone comes to me with a problem, I can legitimately say: "I am a solution!" ?
I see. Thanks, that helps a bit and'll give me something to chew on.
Great vids by the way. Really interesting stuff.
06:29 Why does the total solubility of a solution go up when there is an increase in temperature??
I'm liking this just because he sang under pressure
No one:
Crash course guy: fugu fish
No one:
You: Stupid chemistry joke
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.
3:00 with CC on, FUGU looks like the word FOOD
There are many questions that lack solutions, but the most important question with a solution is "Will it Blend?".
Such a well supervised script.
love the "under pressure"
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! :)
Crash courses are lifesaving 😇😇😇😇😇😇😇😇cool😎
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.