Honestly Khan academy is the reason I get mid to high grades, you explain it in a way someone who has never encountered the subject might actually understand. Thanks a bunch!
@ismailit112 жыл бұрын
i once had a friend and he learned something from your videoes and now he is in harvard.
@no1everreallydiez12 жыл бұрын
I love seeing comments about people using these videos for their MCATs and getting into Ivy League schools, etc. because it's encouraging news and shows the profound effectiveness that Khan's teaching has. THANK YOU! :) And I too will be using these videos for my MCAT to brush up on the basics haha. :)
@NeceeThaLady Жыл бұрын
No MCAt just regular ol biology 🧬 online at that
@Joel-js2gk8 жыл бұрын
Not all heroes wear capes
@whostolemyTV8 жыл бұрын
Haha you win
@bobbysteakhouse70226 жыл бұрын
Some wear hoods
@pohpvp37776 жыл бұрын
Some teach chemistry physics mathematics economics and much more
@AFAbirALFA5 жыл бұрын
khan is a good hero
@ahmadabdullah81684 жыл бұрын
@@gandiaulaad1155 so we are all heroes nowadays.. right? 😃
@Xiek1112 жыл бұрын
Is this really how simple this pH pOH thing is? My lecturer explained this in a really complicated way. Thanks a million. Great work!
@zillaboop12 жыл бұрын
this is amazing! i was having so much trouble understanding my chem stuff, and in one video you've made it crystal clear for me. i went from feeling overwhelmed and almost withdrawing from the course to understanding it well enough to explain to classmates! thank you!!!
@jimlahey53542 жыл бұрын
Can we get an update on where you are now?
@zillaboop2 жыл бұрын
@@jimlahey5354 oh my goodness haha!! this was almost 10 years ago when i was 22! im a 32 now and working as a respiratory therapist! glad i passed that class so i could eventually graduate :)
@israrkarim657 жыл бұрын
I'm in 4th semester at university and I still struggle to understand the basic concepts. Thank you khan academy.
@MikeRoePhonicsMusic12 жыл бұрын
+1,000,000,000 for color-coding! It's extremely useful for organizing information!
@davidkim067812 жыл бұрын
just click on his channel > Featured videos > whichever subject you want to watch > click on video you want to watch..this way you'll be watching through his playlist and the videos will automatically go to the next one for you when it's finished.
@kalpanashedthy31014 жыл бұрын
8:19 of off.. I ain't off untill I watch this video fills my heart.😊
@RajYadav-yf9cl7 жыл бұрын
sals pickup line:"let me switch colour"
@amadeus_music13 жыл бұрын
"of course water is desolved in water" :D Anyway, you're my science-hero
@daedra4011 жыл бұрын
Thanks khan, as countless of them you could receive, each one is meaningful. Especially
@HassHansson5 жыл бұрын
Thanks Sal Khan, youre a legend among men
@sperg112 жыл бұрын
seriously i learn so much just by watching your videos there's no need for reading anymore! it's kinda funny XD
@giuliadepo231410 жыл бұрын
You're the reason why I won't fail my test :D Thank you so much!
@hardikkardam61167 жыл бұрын
me too
@dogsshit766 жыл бұрын
Giulia Depo
@pklmbyers12 жыл бұрын
SoI have taken years of chemistry and NO ONE ever explained what 'p' was! Thank you!
@virupannamedikinal Жыл бұрын
Thank you so much Sal Sir, your videos are helping me a lot.
@BackCountrySR13 жыл бұрын
@The19thKey M represents Molarity, and the molarity is found by Moles/Liters of solvent, in this case water.
@melvinforesman5711 Жыл бұрын
Thank you for successfully teaching me a single concept in 3 mins that my professor failed to in 3 lectured :p
@theartyard15 жыл бұрын
Thank you so much! Your explanations are so clear and easy to understand. You make super chemistry fun! :D
@NeceeThaLady Жыл бұрын
I’m in biology why am I doing chemistry??
@scarlettbildhauer14 жыл бұрын
This video was really helpful. You should have a comment section on your website so that students can give you feedback. Thank you!
@DennisBolanos5 жыл бұрын
You're cute.
@dramaticsloth301212 жыл бұрын
Yes that made perfect sense, however is it just a temporary bond before the hydrogen ion moves onto another oxygen (not sure how it would since the charges attract) because an oxygen can't have more than two bonds usually. If i remember right it is dependent on what angle the bond is and therefore it can only hold a certain number, for instance i think water is held at 107.5 degrees .......
@adivakaruni13 жыл бұрын
i wish i had found these vids while i was taking gen chem! so helpful and clear!
@bloodyfool6912 жыл бұрын
My friend got accepted in Harvard with the help of your videos, true story.
@necaccamo13 жыл бұрын
@The19thKey g/liter= density to get the molarity(M) you need to convert grams to moles. Molarity= mol/volume Volume= liters or millimoles/milliliters. =)
@Jfrancis22113 жыл бұрын
We should use (l) for H2O indicating it is a pure liquid, not (aq)
@paulceltics13 жыл бұрын
very helpful. this is something that is going to save my grade
@Rusty289114 жыл бұрын
@WarpFieldTheorist I received an email saying and I quote " And yet the protons and hydroxide ions are certainly part of an aqueous solution, in much the same way as sodium and chlorine ions can be part of an aqueous solution. When you study chemistry at university you discover that there are all kinds of weird structures floating around which are made of many 'water' units and ions. It is perfectly acceptable to refer to this swamp as an aqueous solution."
@r00bii12 жыл бұрын
@splitecho Oh, Sweet! I'm using these videos right now for GAMSAT (Australian MCAT).
@dydx658410 жыл бұрын
THANK YOU SO MUCH. I WAS SO LOST WITH ALL THE EQUATIONS AND EVERTHING
@dariusfullmer17110 жыл бұрын
If we consider H2O to be aqueous it would be included in the equilibrium. Of course it is not included in Kw, so it should be referred to as a liquid, not aqueous.
@Dnj1zzzz9 жыл бұрын
+Darius Fullmer Yep, was just about to write this; essentially this is screwing up a lot of stuff lol
@MattiasJohnson11 жыл бұрын
When he said that there almost always a probablility of anything to happen it got me thinking, couldn't it be a scenario where a watermolecule loses both of it's hydrogenatoms simultaneously, each one of them to different watermolecules? So like this happends: 3H2O ---> 2H3O + O ???
@terradan201311 жыл бұрын
Thank you for explaining, in simple terms, what all this means.
@mvadim2513 жыл бұрын
@The19thKey Molarity is mole/liter
@swagerificable11 жыл бұрын
it shows you up the top of this page on the right hand side
@osama10512 жыл бұрын
you are soooo freaking amazing. like everything just makes sense to me now.
@joelarthurng15305 жыл бұрын
thank you khan really helped me understood the topic
@Janac13 жыл бұрын
@WarpFieldTheorist haha but rusty is completely right. khan made an innocent mistake, you cannot have aqueous water (which suggests water is dissolved in water). Thanks for point it out rusty, i don't feel that your comments are "bashing with education".
@navdeep_singh_suri7 жыл бұрын
You made this chapter easy...thanks!
@Subaangen15 жыл бұрын
of course you are Indian...cleverest people in world...:)
@christyc46313 жыл бұрын
@azndude3600 i don't know for sure, but since no one else has answered you... i think it's just something that happens from time to time randomly. atoms and their components are always moving (electrons, in particular) and occasionally, they move in ways that are very unusual, but not impossible..
@digiconvalley12 жыл бұрын
jazakaAllahu khairun
@Rusty289114 жыл бұрын
@WarpFieldTheorist Water is not aqueous. When the word water is used in Chemistry it means H2O. There are no salts, no dissolved compounds or a 'swamp' of materials in this. If there was, it wouldn't be water in its purest form, and this purest form is what is being referred to here. And by the way, I am at University working my way through a masters degree and never before have I seen H2O (aq).
@azndude360013 жыл бұрын
@christyc463 I think I found out. I think its a form of intermolecular forces and in this case its ion-dipole attraction.
@dogsshit766 жыл бұрын
azndude3600
@hamedmoradi59 жыл бұрын
i will never ever forgive my year 11 and 12 teachers
@dogsshit766 жыл бұрын
hamed alimoradi
@dogsshit766 жыл бұрын
Me
@That_One_Guy...5 жыл бұрын
i hate my high school teacher more than everyone that pisses me in the past
@AFAbirALFA5 жыл бұрын
@@That_One_Guy... can you please shutup?
@arstgkneio12 жыл бұрын
Damn, you leave no room for ambiguity. I like that.
@x0xbethaNyyx0x13 жыл бұрын
you're amazing.
@kaseymlanier0812 жыл бұрын
@splitecho : woah that's amazing! nice going! what else really helped you do so well?
@alvaro241614 жыл бұрын
Thank you very much!! i was soo confused. Now i understand how this work! yay!!
@TheSadPaki4 жыл бұрын
How many subscribers he had at that time??
@RikaShion11 жыл бұрын
Sir, you have just offered a big big help !!!
@northlight7214 жыл бұрын
Whoever you are, someday I want to meet you and shake your hand. There's nothing you can't put in understandable terms.
@Alfietto9213 жыл бұрын
Flawless explanation =D
@mrcrumpet12311 жыл бұрын
you are a god
@lyssss0912 жыл бұрын
Can u come here in australia and be my highschool chemistry teacher?:)) Thanks so much for this.. I understand it more that when my teacher was teaching us that:))
@463568376312 жыл бұрын
ooooooooooh my wooooooooooooord! absolutely love this vid's. going to save my (academic) career! thank you so much! :D (grinning like a boss)
@murdoc2000011 жыл бұрын
why is the option to increase the play speed removed?
@agent47581610 жыл бұрын
If Hydroxide and Hydronium are formed, won't they just collide together and turn back into water. Doesn't make sense, unless they are surrounded by water molecules. the OH- is surrounded by water molecules on the hydrogen side and the H3O+ is surrounded by water molecules on the oxygen side. If that's not the case, then they would attract each other right?
@abcdefgh-fb5ny3 жыл бұрын
I wish my highschool teachers had taught me the concept like you did, instead of just giving us the formulas and letting us go figure out the problems ourselves. Then I wouldn’t have to re-study an 11th GRADE TOPIC
@lucasfelipedesousa80062 жыл бұрын
p stands for "Potentia Hydrogenia" (Potential Hydrogene Force)
@aussietro12 жыл бұрын
Thats a great score! What else did you do?
@dogsshit766 жыл бұрын
Austin Friswold
@lourdeslopezdiaz98817 жыл бұрын
Gracias por los subtítulos!!!
@efisgpr6 жыл бұрын
Sabías que todo el contenido de Khan academy.org está disponible en español también? Bueno, en interfaz español, por lo menos....y que tienen otro canal acá en KZbin que se llama "Khan academy en español" o algo muy parecido? Suerte, Alex
@ahmadkhaled9072 Жыл бұрын
imagine watching this vid 5 years ago..
@Poochester14 жыл бұрын
you are amazing.
@amadeus_music13 жыл бұрын
@khanacademy you said at 10:00 that M = mol/l. but isn't M = g/mol??
@Rusty289114 жыл бұрын
H3O is known as a hydroxonium ion aswell. Also H2O is not aqueous, it is a liquid. You can't dissolve water in water.
@NomsNomsNomsNoms13 жыл бұрын
great :) didn't notice any mention of pKa? thanks you :)
@kemoi.m8 жыл бұрын
Will those neon colours affect the eye
@sibtiali8028 жыл бұрын
16:30....oooo now i know what pH actually means!
@kimmygobo8 жыл бұрын
Thankyou so much for making these videos they have helped me so much! :)
@madlenlika469513 жыл бұрын
Thank u soo much!!!u really helped me with this video.
@MrCordezzz12 жыл бұрын
Thank you for putting these great videos out.
@Rusty289114 жыл бұрын
@northlight72 Have you actually ever ready anything I put? I simply pointed out one mistake, and one other way of saying something. Your saying I am not helpful when people have said that I have been. I mentioned my masters degree as someone said that 'il understand better at uni', so i mentioned that i was already at uni and havent heard water as aqueous. I've never attacked the Khan Academy, even when he made a mistake. His videos are fantastic and helpful. And thanks for the career info :)
@dramaticsloth301212 жыл бұрын
i like the video, however how can there be a hydronium ion when oxygen has a valency of 2?
@Madietastic12 жыл бұрын
OH MY GOD.....Thank you so much...
@BrandonPentz12 жыл бұрын
some can, just no one pays attention to what there saying, whereas, in this video, you do
@Phaze25212 жыл бұрын
Technically it should be (l) because the (aq) is as he said redundant and the OH- is called OH instead of HO because of tradition.
@crashonthehumble15 жыл бұрын
nice work
@sciencenerd76392 жыл бұрын
thank you
@digiconvalley12 жыл бұрын
u r the best
@rawdonwaller12 жыл бұрын
@TheYo12343 Maybe 'puissance', as in puissance de Hydrogen? 'Puissance' is the French term for 'power.'
@heeheehoppsies12 жыл бұрын
Thankyou so so so so so so so so so so so so so so so so so so so so so so so so so so so so so so much
@BareClause12 жыл бұрын
isnt h20 mean 20s and a 1 h because of the coefficient
@LeeJordanMusic12 жыл бұрын
Its funny how messed up the school system is here... I've learned more in about an hour than i have in 3 weeks in my chemistry class...
@azndude360013 жыл бұрын
Why would water form hydronium? I don't understand it. Oxygen is already happy with its 8 electrons. Why would it get another proton?
@ewwxaca5 жыл бұрын
THANKS
@Rusty289114 жыл бұрын
@WarpFieldTheorist Your a PhD student (guessing Chemistry) and you think 2H2O(l) ---> H3O+(aq) + OH-(aq) is wrong? I actually went out of my way to visit my Acids and Base lecturer to ask about this and he said that H2O is a liquid. What did I say that was critising the video? I pointed out 1 error and thats it. And calling me a Troll...well the less said about that the better.
@comedianmalyka26464 жыл бұрын
this video came out when i was 8
@ZahdShah4 жыл бұрын
I was 10 or something lol
@rawdonwaller12 жыл бұрын
Pedantic though it may be, does H2O's subscript (l) stand for liquid? I thought that aqueous phase means that the molecule or ion is surrounded by water molecules, in which case water molecules themselves are 'in' liquid phase (because it doesn't make too much sense t think of water molecules solvating themselves)? Of course, this is a superb video, and I may be wrong anyway.
@Eludinium Жыл бұрын
So does this mean that water IS wet?
@KalimaShaktide8 жыл бұрын
The link is broken...where is this video on the main site?
@hardikkardam61167 жыл бұрын
thanks , u r the best !
@MoonKnightBlack9 жыл бұрын
thanks
@musicajourney16433 жыл бұрын
Thanks!
@1xtra29914 жыл бұрын
@WarpFieldTheorist & @northlight72: do you guys have any links that prove what youre saying? im all confused now... even my professor says that H20 should be a liquid
@ndawon112 жыл бұрын
god bless you
@saher9973 жыл бұрын
Thanks alot
@lysafae12 жыл бұрын
@Mrgamer4 Haha. Same here!
@chrysovalantistasiopoulos99875 жыл бұрын
because the density of pure water is 1 gr/ml , and the molar mass of water is 18 gr/mol in 1 liter which is 1000gr the number of moles is 1000gr/18gr/mole = 55.55mole per liter, that is a constant value of the concentration of the water, so Kw=K*55.55M =K*[H2O] , this is the reason you never writing the concentration of the pure water in the denominator of the fraction of equilibrium constant . IT has nothing to do with probabilities !!!!!!!
@nasra90958 жыл бұрын
Thank you so much!
@AshaunaByrum7 жыл бұрын
Where is the next video to this series??
@northlight7214 жыл бұрын
@Rusty2891 Honestly, if you are so concerned with being helpful, make your own video. But again, stop.