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
At 7:24 one of the answers shows as 9.868, instead of 9.683 (although just a minute later they show the correct number, 0.9683), and I know that this episode has already been published for so long, but I just wanted to point it out in case anyone else got confused like I did. Thank you so much for posting this video for me! It really helped me to better understand!
Hank i cannot bring up the words to describe how much i love you rn. i have my chem test tmrw and do not understand this concept at all and you have explained in 5 minutes what my teacher tried to teach me in a week. Hank you are truly a man sent from the heavens. I will pray to you on your dedicated shrine everyday
I love how Hank doesn't shy away from the numbers. I get that they are super basic equations, but they are extremely useful for those of us who are still fairly new to Chemistry.
If you're wondering how he got the quadratic equation: 115=(4x^2)/[(1.00-x)(2.00-x)] since (1.00-x)(2.00-x)=(1*2)+(-1x)+(-2x)+(x^2)=x^2-3x+2 then 115=(4x^2)/(x^2-3x+2) subtract 115 from both sides: 0=[(4x^2)/(x^2-3x+2)]-115 Common denominator step: 0=[(4x^2)/(x^2-3x+2)]-[115(x^2-3x+2)]/(x^2-3x+2) 0=[(4x^2)-(115[x^2-3x+2])]/(x^2-3x+2) since 115(x^2-3x+2)=115x^2-345x+230 then 0=[(4x^2)-(115x^2-345x+230)]/(x^2-3x+2) 0=(-111x^2-345x+230)/(x^2-3x+2) =(111x^2-345x+230)/(-x^2-3x+2) multiply (-x^2-3x+2) on both sides: 0=111x^2-345x+230
Accidentally left the speed setting on 1.5 when starting this video. Just about had a seizure. I usually have to speed up other videos because they go through the material too slowly. Not crash course, though.
Isn't that complex, if you need to find equilibrium, draw rice. If you don't have a numerical value at equilibrium, use unknown X. For the theory part, just use LCP to answer your way through. IMO, chemical equilibrium is way easier than ionic equilibrium or chemical kinetics
Whenever he says "The script supervisor is Katherine Green" I get this image of the Katherine just looking at the scrip, pointing and saying "This bit's stupid!"
This was explained in a way more complicated way haha. I don't even think he told us how you get the change part really. Thanks for this so I get a night before session in!
As the X is always so small you actually can take it out of the equation at @6:48 where you have to subtract it or add it to the numbers. On the other hand you can't where you are multiplying for obvious reasons. This helps you skip the dreadful aftermath.
At roughly 8 minutes when Hank puts in the x-values to find the equilibrium amounts of the products and reactants, did he incorrectly put in 0.968 opposed to 0.986 or did I miss something?
thank you a million times for making the equation solving as easy as making rice!!! my chem teacher sucks to the core but YOU JUST SAVED MY LIFE!!! THANK YOU AGAIN!!!!
i love the very subtle the ocean is acidifying because of the increased co2 in the atmosphere message. very smooth. people wont even know they are being indoctrinated.
According to what I learned. Sometimes, you can simplify the algebra. For example, you try to find x and you have to information K=1.3*10^-22=x^2/(2.00-x). The value of K is very small so you can assume that x is also very small and negligible. Therefore, you can assume 2.00 - x = 2.00 and solve. x^2 = 1.3*10^-22/2.00 and then take the square root and get 8.1*10^-12. You can find that x is indeed very small. You can check by subtracting 8.1*10^12 from x. In the end, it would still be 2.00 after you round it to the right number of significant figures.
3:41 "what you need to see is that the quotient on the right must always yield the same number be cause IT S A CONSTANT" cracks me up every time haha i love this guys videos
I love how I watched this in chem 11, and now im right back in first year chem lol. Some teachers just cant teach ~not all smart people are good teachers, and not all teachers are smart people. lol god bless you Hank, god bless you and your team.
thanks for these videos, they've managed to carry me through a six week summer chem course with a B (and will hopefully keep it from slipping to a C, my final is tomorrow).
This is the one thing of IB Chem that I cannot wrap my head around. Who the hell. Why the hell...just help me God I am not prepared for exams involving this.
Darn you, Hank! The quadratic equation is giving me flashbacks to algebra in high school. -shudder- (my teacher taught us the formula to the tune "Pop Goes the Weasel")
It may not be more descriptive, but it is more precise. "Power" is a fairly common word with many meanings... In physics, for example, "power" has a technical meaning and it's nice not to need to say something like "the power of the power" when you mean "the exponent of the power."
At 4:17 in the video the H2CO3 bubble should be growing larger (with the H2 bubble) but instead shows to be getting smaller. If you guys can't correct your videos, please at least make note of corrections in the video description because simple mistakes like this can still be very misleading and not to mention, all your videos get a very high % of likes which makes people trust their content.
+EricWarriorPrincess Not many people care (except some really depressed or obsessed idiots who actually are the only ones who realized its wrong. The majority will realize it only after they read the comment. So just keep your comments to yourself).
Pardon me if I understood this wrong, but I hope somebody can tell me what is correct: Hank says in this video as well as the previous one that equilibrium is when the forward reaction happens at the same rate as the backwards reaction. But as far as I learned, those two rates don't have to be equal, they just have to be CONSTANT (for instance you could have much more reactants turning into products than products turning into reactants but it would still be an equilibrium reaction). Thank you!
Most often, you would really just use the same equation Hank showed in the video (products/reactants = Keq). The final concentration of the products would be determined using some form of analytic technique (spectrophotometry, chromatography, etc.) depending on the reaction. You can then calculate the final concentrations of the reactants. From there, it's just a matter of plugging your concentrations into the equation to calculate Keq.
... which is a song about someone pawning his coat ("weasel and stoat" - "coat") to be able to afford rice and treacle, so he'll have something to eat until next payday comes along.
Insightful as always. Just one question though, how can you use factoring to get the same results? Of course it is without a doubt that it would take much longer than just simply using the quadratic formula. But if there in one thing that I learned in math, is that there are various ways to get one answer. In the case of quadratics there are at least 2 different ways to get an answer.
Hey CrashCourse I hope that you would notice me. Watching your opening video makes me enjoy the video that i am watching. I hope that you will put more animation to your videos for it will not just give us knowledge but also entertainment
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
"Chemistry is proof that the universe is messing with us."
YES THIS EXPLAINS SO MUCH
Lmao actually started to cry watching this because of how screwed I am for my equilibrium test in two days
me. too
+Molly Seidl im thinking the same thing..... the only difference is that my test is in two hours and i cant understand a thing :((
+Molly Seidl in two days? you still had time to learn it! i have the test tomorrow morning and it's eleven o'clock already.
Ever noticed why no guys said this?
+Silke B
That guy is just trolling everyone's comments. Don't feed him.
Hank has legit assisted me through high school, my bachelors and now my doctorate program. Can't even thank him enough.
My two year old always says "Hi" to the iPad when I watch these. He seems convinced that I'm face-timing with Hank Green!
haha cute! ♡
Why are you watching this if you are old enough to have a kid?
@@aaaadit5155 she might be a teen Mom or just a young mother. Or maybe she is just curious about learning more chemistry! ^~^)/
@@aaaadit5155 not every parent knows chemistry. tons of hs don't take chem or arent fortunate to go to hs or finish
@@aaaadit5155 it could be a 2 year old brother or sister
"simple and totally not scary calculations"
* intense fear *
Here as proof that homeboy will get you through high school AND college chemistry.
At 7:24 one of the answers shows as 9.868, instead of 9.683 (although just a minute later they show the correct number, 0.9683), and I know that this episode has already been published for so long, but I just wanted to point it out in case anyone else got confused like I did.
Thank you so much for posting this video for me! It really helped me to better understand!
I love how these videos get me amped up and ready to do homework. I was so unmotivated 10 minutes ago. Thanks.
This is the only thing keeping me alive in AP Chem.
same. I'm in IB chem and it's a struggle
***** No one asked you. Just kidding. I love AP Chem
***** This came in too late for me lol. IB chem was hard.
Woooo America
innocentboyzthegreat and I can confirm ib chem is still hard
Hank i cannot bring up the words to describe how much i love you rn. i have my chem test tmrw and do not understand this concept at all and you have explained in 5 minutes what my teacher tried to teach me in a week. Hank you are truly a man sent from the heavens. I will pray to you on your dedicated shrine everyday
I love how Hank doesn't shy away from the numbers. I get that they are super basic equations, but they are extremely useful for those of us who are still fairly new to Chemistry.
If you're wondering how he got the quadratic equation:
115=(4x^2)/[(1.00-x)(2.00-x)]
since (1.00-x)(2.00-x)=(1*2)+(-1x)+(-2x)+(x^2)=x^2-3x+2
then 115=(4x^2)/(x^2-3x+2)
subtract 115 from both sides: 0=[(4x^2)/(x^2-3x+2)]-115
Common denominator step: 0=[(4x^2)/(x^2-3x+2)]-[115(x^2-3x+2)]/(x^2-3x+2)
0=[(4x^2)-(115[x^2-3x+2])]/(x^2-3x+2)
since 115(x^2-3x+2)=115x^2-345x+230
then 0=[(4x^2)-(115x^2-345x+230)]/(x^2-3x+2)
0=(-111x^2-345x+230)/(x^2-3x+2)
=(111x^2-345x+230)/(-x^2-3x+2)
multiply (-x^2-3x+2) on both sides: 0=111x^2-345x+230
Or for something more simple:
115 = 4x^2 / [(1.00 - x)(2.00 - x)]
115 = 4x^2 / (x^2 - 3x + 2)
115(x^2 - 3x + 2) = 4x^2
115x^2 - 345x + 230 = 4x^2
115x^2 - 4x^2 - 345x + 230 = 0
111x^2 - 345x + 230 = 0
daniel luna Ooo, nice one! That simplifies it, so thanks.
Watching Crash Course videos all morning for chemistry is one of the perks of being a homeschooler…. Wooh.
Indeed, homeschooling is wonderful.
This channel is really carrying me through school during quarantine
Two years later and this is still accurate as hell, thank you crash course
Exam in 2 hours
IB Chem exams tomorrow.. wish me luck guys.
How'd it go?
JayVinFoong IB? RIP
Jackson M I survived guys! Did better than I expected! =D
You are my hero
I have an exam tomorrow too. In like 12 hours.
Thanks. I understand chemical equilibrium a bit better with these crash course videos.
I read all the odd stuff on the crash course beginning montage, and Chemist Hank, I too, think myself an artist, and want my own particle accelerator.
AYYY FLASH
Only thing I learned from this video is that I have to wing my next test :D
lol same
Hank, you make chemistry so exciting!
Wish I found out about this before... would've helped me through the tough year. Binge watching for the AP Exam tomorrow. Helps so much.
My brain is so hurties... BUT I think im learning.. something
Anyone else watching this before AP chem test?
Me
Me, I'm taking it tomorrow!
Accidentally left the speed setting on 1.5 when starting this video. Just about had a seizure. I usually have to speed up other videos because they go through the material too slowly. Not crash course, though.
The math and how it fits all together is almost poetic.
I wish I found these videos months ago when I first started my class. Anyway, thank you Hank for being so dang awesome.
I've got a Chemistry exam tomorrow and this is really helping me sort it all out!
crash course about to drop the hardest beat of 2018 at the end with that intro remix
I really like how you have a table of contents in the description! its very useful
"Totally non scary calculations " lol
Isn't that complex, if you need to find equilibrium, draw rice. If you don't have a numerical value at equilibrium, use unknown X. For the theory part, just use LCP to answer your way through. IMO, chemical equilibrium is way easier than ionic equilibrium or chemical kinetics
after I watched this video I now know why people cheat on test
+Albania Albanian haha
why ppl cheat on test?
+Ahmad Iftikhar Because it's ridiculously difficult for 9th graders
+The Real Cake Is this ninth graders... are you sure????
+The Real Cake is it really? it's pretty basic stuff...
+barmiro The math is pretty simple but the algorithm memorization is a pain sometimes.
Crash Course Mathematics, anyone?
yes
yes
yes
yes
yes
yes
yes
yes
Yup...
what does that even mean though?
Thank you Hank, for teaching and old dog new tricks! I'm not sure I'd be surviving my gen chem 2 course right now without you. Wonderful work.
Whenever he says "The script supervisor is Katherine Green"
I get this image of the Katherine just looking at the scrip, pointing and saying "This bit's stupid!"
damn, did not expect to use quad formula in chemistry. The more you know.
Excellent! Tricked my Chemistry teacher by asking doubts!
For anyone curious, in the scene on Hank's shirt, Admiral Akbar is saying 'It's a trap' (as I'm sure you could have guessed.)
It s 2am and i have a test tomorrow,let s see how it goes :D
Well how was it?
Crash course is so amazing! i'm so happy i don't have to read through my overly and almost purposefully complicated text book now.
This was explained in a way more complicated way haha. I don't even think he told us how you get the change part really. Thanks for this so I get a night before session in!
AP chem rest is tomorrow, if I get higher than a one I’m thanking this guy
We got this brother. 45% is a 3. I’m not confident either but during these unique times an ap exam isn’t the most important thing.
@@AVGII *test
I do not go to school anymore and i have great fun watching. Wish more people would learn to love this kinda of stuff.
Finaaly i understand why we learn that ******** maths thanks dude awesome!!!!!!
As the X is always so small you actually can take it out of the equation at @6:48 where you have to subtract it or add it to the numbers. On the other hand you can't where you are multiplying for obvious reasons. This helps you skip the dreadful aftermath.
veigar7 That's just for when x is small. When the molarity is over 1000 times greater than the k value, x is small works.
Well, now I understand Rice tables. Thanks Crashcourse!
Hank, YOU SAVED MY LIFE!
thank you! thank you! thank you! My professor kept babbling about this for 45 min and I didn't understand a word!
At roughly 8 minutes when Hank puts in the x-values to find the equilibrium amounts of the products and reactants, did he incorrectly put in 0.968 opposed to 0.986 or did I miss something?
+Nate Smith Good catch. That was a mistake.
thank you a million times for making the equation solving as easy as making rice!!! my chem teacher sucks to the core but YOU JUST SAVED MY LIFE!!! THANK YOU AGAIN!!!!
Studying for my AP Chem exam!!!
me too i have mine tomorrow.... literally all ive done today is watch these videos lol
The only thing that helps me go through chemistry
algebra fkn kills me, I swear to god, If I somehow manage to pass this damned equilibrium test in two days I'm going to cry.
How'd you do?
Please make a series on crash course mathematics
⬇ Support those who want this.
i love the very subtle the ocean is acidifying because of the increased co2 in the atmosphere message. very smooth. people wont even know they are being indoctrinated.
play it in 0.75x to hear normal talking
Thank youuu
loll i do .5 bc im just that dumb
This is an awesome way to learn ! I enjoy it very much even this is not my language ..
Keep up the good work !
AP exam in 2 hours, still watching Hank's videos. Nice review.
According to what I learned. Sometimes, you can simplify the algebra. For example, you try to find x and you have to information K=1.3*10^-22=x^2/(2.00-x). The value of K is very small so you can assume that x is also very small and negligible. Therefore, you can assume 2.00 - x = 2.00 and solve.
x^2 = 1.3*10^-22/2.00
and then take the square root and get 8.1*10^-12.
You can find that x is indeed very small. You can check by subtracting 8.1*10^12 from x. In the end, it would still be 2.00 after you round it to the right number of significant figures.
3:41 "what you need to see is that the quotient on the right must always yield the same number be cause IT S A CONSTANT" cracks me up every time haha i love this guys videos
The moment I heard quadratic formula i was like 'Fuck no'
Hank, you are simply AMAZING. Thank you so much!
I love how I watched this in chem 11, and now im right back in first year chem lol. Some teachers just cant teach ~not all smart people are good teachers, and not all teachers are smart people. lol god bless you Hank, god bless you and your team.
thanks for these videos, they've managed to carry me through a six week summer chem course with a B (and will hopefully keep it from slipping to a C, my final is tomorrow).
Chem test tomorrow... Thank you so much, Hank. This video has saved me!
You freaking rock. I learned more in 10 minutes than I did in two 75 minute lectures from my chem prof.
How did he get the big numbers for the quadratic equation
This is the one thing of IB Chem that I cannot wrap my head around. Who the hell. Why the hell...just help me God I am not prepared for exams involving this.
He started talking about the quadratic formula and I got ptsd to 8th grade. I'm in 11th grade.
What i learned
• Make great videos
• product is more people subscribing you
And then equilibrium
I'm studying chemistry
this was MUCH more helpful than my goddamn teachers
Darn you, Hank! The quadratic equation is giving me flashbacks to algebra in high school. -shudder- (my teacher taught us the formula to the tune "Pop Goes the Weasel")
Im gonna donate my college funds to crash course this channel helps me more than my class ever could
Thanks for the good explanation; keep up the good work!
Mr. green , you are the best chemistry teacher
It may not be more descriptive, but it is more precise. "Power" is a fairly common word with many meanings... In physics, for example, "power" has a technical meaning and it's nice not to need to say something like "the power of the power" when you mean "the exponent of the power."
ALL HAIL CRASH COURSE
Carrying me through my mid and high school
GG
The captions need to be semi transparent/ opaque !!!! I need to see the numbers!! Thanks for what u all r doing here !
you mentioned an algebra formula in your video. i was trying to figure it out for months! Thank you!
Hank: Do you know that there's no edge to the universe?
John: Do not allow this astrophysical mumbo-jumbo in my car
At 4:17 in the video the H2CO3 bubble should be growing larger (with the H2 bubble) but instead shows to be getting smaller. If you guys can't correct your videos, please at least make note of corrections in the video description because simple mistakes like this can still be very misleading and not to mention, all your videos get a very high % of likes which makes people trust their content.
+EricWarriorPrincess Not many people care (except some really depressed or obsessed idiots who actually are the only ones who realized its wrong. The majority will realize it only after they read the comment. So just keep your comments to yourself).
+Aryan Shetty That was absurdly horrible.
+Aryan Shetty your comment is so stupid on so many levels...
+Aryan Shetty Yeah, how does he even DARE to point out an error to make the content better?!
Nobody cares, what a waste of comment space.
*/s*
& u r right bout d trust part😀 ... I definitely doubted my ability to understand d content at first cause I trusted this channel so much😅😅😅!!!!
I love you, Hank
Am I the only one who just totally rocks out to the theme song?
Thank you so much for these videos!
Pardon me if I understood this wrong, but I hope somebody can tell me what is correct: Hank says in this video as well as the previous one that equilibrium is when the forward reaction happens at the same rate as the backwards reaction. But as far as I learned, those two rates don't have to be equal, they just have to be CONSTANT (for instance you could have much more reactants turning into products than products turning into reactants but it would still be an equilibrium reaction). Thank you!
Currently I'm in Chem III at my high school which for my school is a dual credit course through a university. We are just starting it now.
Shoutout to the AP Chem exam tomorrow
Cool, this is exactly what we are doing at school. Almost skipped the video because I did not know the translation to the terms.
Nice recap for me
This helps so much, you make it possible to pass chemistry 30. I hope I pass my chem test tomorrow.
Why is the Crash Course theme SO awesome?
I will NEVER forget the Quadratic Formula thanks to my 8th grade math teacher who taught it to us by setting it to the tune of Pop! Goes the Weasel
Most often, you would really just use the same equation Hank showed in the video (products/reactants = Keq). The final concentration of the products would be determined using some form of analytic technique (spectrophotometry, chromatography, etc.) depending on the reaction. You can then calculate the final concentrations of the reactants. From there, it's just a matter of plugging your concentrations into the equation to calculate Keq.
... which is a song about someone pawning his coat ("weasel and stoat" - "coat") to be able to afford rice and treacle, so he'll have something to eat until next payday comes along.
I'm on 16 and I freaking love chemistry
really? you enjoy this torture?! smh
+CrashCourse Thanks so much I understand it now. Really glad I found this video because I have a test in grade 12 chemistry tomorrow
This guy explains things so much better than my chem teacher
I wish I knew this channel existed while I was in high school.... >.> would have helped me out a lot! I was so confused in chem!
Insightful as always. Just one question though, how can you use factoring to get the same results? Of course it is without a doubt that it would take much longer than just simply using the quadratic formula. But if there in one thing that I learned in math, is that there are various ways to get one answer. In the case of quadratics there are at least 2 different ways to get an answer.
Hey CrashCourse I hope that you would notice me. Watching your opening video makes me enjoy the video that i am watching. I hope that you will put more animation to your videos for it will not just give us knowledge but also entertainment
Holy multifandom garments, Batman! I want Hank's t shirt like Mr. Fredricksen wants to go to South America.