You are the most amazing teacher you literally explain this in 10min where the average teacher would take a whole lesson and I still wouldn't get it. Thank you so much!
Start video at 4:10 if you weren't following up from the previous video. That's when he starts the part you intended on watching when you searched it...
what? everything before 4:10 is about acid and bases. In order to understand acid and bases, you have to understand what pH is. and in order to understand pH, etc.. Before 4:10 IS the introduction of acid and base. if you're in high school and they ask for the simple definition of acid and base, go to 4:10. better yet, google it. so sad. people have no idea what they even mean when they say pH, acid, and bases. i mean what they REALLY mean. keep bullshitting your way through your life everyone. another thumbs up!
ive never not sarcastically called someone a know it all. This guy really is a know it all. Im pretty sure he knows everything about everything. id put money on that.
This is so much better than at school, at School all they do is tell you to read the text book. Whereas, this guy actually TEACHES. Teachers at my school dont teach anymore, yet they demand higher pay.
I got used to ur voice so much that I don't feel comfortable with others explaining anything I search for within Khan Academy 😭. Thank you so much for everything. U r amazing 🙏
I see a lot of comments here complaining about teachers and stuff, I think this is a problem in our school system, people know how to learn and to pass, they get qualified to be teachers because they master concepts to a certain level , yet they do not master it conpletely, because the highest form of understanding something is knowing how to explain it simplified to a person that knows nothing, this is what Khan does and I wish more teachers could do this rather than thinking you're dumb,
I'm from argentina.I studied english cince childhood but never pay attention in class and now i wish i could understand you :( A guy here in argentina traslate your videos and i love you way to explain..but still do not had these videos on acids and bases. well thanks anyway..kisses! :D
@rijaa000 HCl is a acid and H20 is a base. The hydrogen in (H)Cl will eventually dissociate into the H20 because both the solution contains Hydrogen, and the main point of the reaction is to dissociate HCl and H20 completely, so the Hydrogen would ionize into H20(H20(water) is an ionizer) forming H30 the product of the reactant. the Cl will be alone in order for the dissociation to occur. The remaining solutions will have a polar + and - sign(positive attracting negative).
@StraightShotz Water is pure, if it isn't pure then it isn't water. When water is referenced in chemistry it is meant as the pure H2O compound and is therefore a liquid not aqueous.
HELLO!!!!! LiOH -> (OH-) + (Li+) is a "proton donor" reaction according to Lowry. This reaction also looks like this: LiOH(s) + H2O(l) => Li+ + OH- + H20 + HEAT The O in OH has a proton attached to it, the H. Therefore, it donated the proton th the aqueaous solution and produced heat aswell. buya!
This video doesn't really cover pH acid base calculations. You use equilibrium expressions to find pH and pOH. Check out some of the other videos, although I haven't seen Khan use an equilibrium table (ICE table). It's really useful for finding pH from concentrations.
I'm affraid there are some people on youtube who are just here to be an asshole, instead of having a good time (or to learning something). Disliking every video they see, except those of Lil wayne or Justin Bieber, is probably the only thing they do here.
Question, say we have bicarb, in goes from h2Co3 and dissociates into hC03- then co2 and water. If we have more con base, or we have more HC03- than H2C03, that means that the solution will be more basic. That doesnt make sense to me, ph is the measure of the concentration of protons, so in the last soln there would be more proton in soln. How can we say that a solution with more H2C03 than hc03- is more acidic if there is less dissociated protons in solution, the protons would be on the bicarb
@lamchop7 Pardon me, however; I have a small correction to your comment. The first group is indeed called the Alkali metals. However the second group is called the AlikaliNE earth metals :) Great vid! exceptionally helpful!
When you add the Hcl to the water, why does the H+ cocentration in the water increase if the added Cl also adds to the overall amount of molecules in a defined amount of molecules? My thinkinig: the H+ concentration in the "solution" should only increase if number of Cl was < Oxygen molecules? Where is my mistake in thinking? Does anyone know? Thanks! Another question: what determines the fact that acids prefer dissolving in the aqueous solution than stickiing together? Thanks again ;)
Hey Sal, small correction here. The Group 1 elements are called the Alkali metals. Alkali earth metals are the group 2 elements. Anyways, thanks for the videos- really helpful. Keep them coming!
for acids NAOH will dissociate in water so it becomes Na+ and OH- will the hydroxide bond with a hydrogen making it water or with what will it bond with
ty very much butttt i didnt understand this part--> 8:16 if it consumed X how come you got 2X? one for each molecule .. is there any video explains this part?
the "fancy font" is just danish and Norwegian letter Ø or ø. It is because Brønsted was Danish pronounced liked the vowel in soeur (sister in french) :)
How did it go? I think you could've done it... I had 1 Chem lesson to learn in 4 hrs, and I got a 95 on the test. I would say good luck, but youtube says the post was 6 days ago, so your test is over.
@lollmaoroflhahaa No, water should not be liquid because it is in an aqueous solution (it is in water) I know it sounds redundant but technically, you would say that it is in an aqueous solution because that helps you see that it is dissociating. Water in water is an aqueous solution. He is trying to show that acids and bases react in aqueous solutions.
oh wow, i had my chemistry finals today and i watched the videos until here, i stopped watching them and i left for my exam and guess what? i could have solved 2 questions which i did not if i would have looked just this one video! :(
That's because a single H+ ion is extremely unstable and reactive. It cannot exist on its own. Therefore it goes and attaches itself to the hydrogen atom from a water molecule, thereby increasing the number of hydrogen atoms in a water molecule from 2 to 3. The water molecule becomes hydronium molecule.
In the B Lowry Base, it's not that the "Li+ has accepted the fact that it has a proton +" that make it a base, it's that the OH- ion can ACCEPT a proton (H+) out of the solution and make a water molecule - thus it is a proton acceptor.
Guess who needs to watch these videos? my chemistry teacher.
+salma N nice one haha my teacher needs it too
Yeah, all of them
+salma N mine also he doesnt know anything
lel i hope hes watching my comment now if he is i wnna say lel mad bro mr.semi cerkez
Hahahaa BURN
😅
You are the most amazing teacher you literally explain this in 10min where the average teacher would take a whole lesson and I still wouldn't get it. Thank you so much!
Start video at 4:10 if you weren't following up from the previous video. That's when he starts the part you intended on watching when you searched it...
thanks. I was just about to close it down
Amanda keep doing what you are doing thanks for the update
thank you
thanks girl
what? everything before 4:10 is about acid and bases. In order to understand acid and bases, you have to understand what pH is. and in order to understand pH, etc.. Before 4:10 IS the introduction of acid and base. if you're in high school and they ask for the simple definition of acid and base, go to 4:10. better yet, google it. so sad. people have no idea what they even mean when they say pH, acid, and bases. i mean what they REALLY mean. keep bullshitting your way through your life everyone. another thumbs up!
Your videos are so helpful. I appreciate all the time and effort you put into these, you are an excellent teacher and you provide great examples.
ive never not sarcastically called someone a know it all. This guy really is a know it all. Im pretty sure he knows everything about everything. id put money on that.
Can I say that you saved me in anatomy and find all your videos helpful. I must have watched your video kidney video twenty times. Thanks.
This is so much better than at school, at School all they do is tell you to read the text book. Whereas, this guy actually TEACHES. Teachers at my school dont teach anymore, yet they demand higher pay.
I got used to ur voice so much that I don't feel comfortable with others explaining anything I search for within Khan Academy 😭. Thank you so much for everything. U r amazing 🙏
13:10
"Okay, a base is someone who... proton acceptor."
I laughed for about 5 minutes straight. lol
Great video. Your videos are helping me with my MCAT studies.
man, if you arent a lecturer, you should apply. The teaching world needs you!
I see a lot of comments here complaining about teachers and stuff, I think this is a problem in our school system, people know how to learn and to pass, they get qualified to be teachers because they master concepts to a certain level , yet they do not master it conpletely, because the highest form of understanding something is knowing how to explain it simplified to a person that knows nothing, this is what Khan does and I wish more teachers could do this rather than thinking you're dumb,
lol "Just to over-complicate your life a little bit more"
This vid is so much easier to understand than my chem book, so thanks! :)
Agree with you
I'm from argentina.I studied english cince childhood but never pay attention in class and now i wish i could understand you :(
A guy here in argentina traslate your videos and i love you way to explain..but still do not had these videos on acids and bases. well thanks anyway..kisses! :D
Thank you! This really helped me understand the three theories.
@rijaa000 HCl is a acid and H20 is a base. The hydrogen in (H)Cl will eventually dissociate into the H20 because both the solution contains Hydrogen, and the main point of the reaction is to dissociate HCl and H20 completely, so the Hydrogen would ionize into H20(H20(water) is an ionizer) forming H30 the product of the reactant. the Cl will be alone in order for the dissociation to occur. The remaining solutions will have a polar + and - sign(positive attracting negative).
lmao haven't paid attention in class since discovering khan academy, no teacher is this good.
how does this guy have so much time to make like a gazllion khan academy videos? he's in like everyone lmfao
god bless you mahn, u broke everything down for me to understand easily. thanks and kudos to you.
It is a little complicated but lots of other thing helped me break this down thank you this is very good
You're videos are a life saver! THANK YOU SO MUCH!!!!
@kmart166 naw its an amphoteric substance so it can act as both an acid and a base. it just depends on the situation
wish you would add a video on the chemistry of water disinfection using Chlorine and Chlorine and Ammonia.
Great video thx for sharing Khan!
you are truly amazing! your videos help me soo much!!!
Khan sayin 'STRONG ASSES' on purpose
Where in the world do people get off disliking this? Good god
Gazab sal Bhau..!!! Love from India
Could not put it better myself :) great comment and yeah this guys is a genius and a great teacher :)
Please start from main introduction examples like the definitions and thier uses and the difference between them
@StraightShotz Water is pure, if it isn't pure then it isn't water. When water is referenced in chemistry it is meant as the pure H2O compound and is therefore a liquid not aqueous.
HELLO!!!!!
LiOH -> (OH-) + (Li+) is a "proton donor" reaction according to Lowry.
This reaction also looks like this:
LiOH(s) + H2O(l) => Li+ + OH- + H20 + HEAT
The O in OH has a proton attached to it, the H. Therefore, it donated the proton th the aqueaous solution and produced heat aswell.
buya!
This video doesn't really cover pH acid base calculations. You use equilibrium expressions to find pH and pOH. Check out some of the other videos, although I haven't seen Khan use an equilibrium table (ICE table). It's really useful for finding pH from concentrations.
The definitions and the uses of acid and base
Isn't the OH- the proton acceptor/receiver? If you have H+ floating around, it is received by the OH- to form H2O...
wow this is good gear. been wondering about this since first week of class.... and its almost exam time hahaha
Really clear explanation that helped a lot, thank you! :)
can you give me a link of previous video?
strong acids got dem abs yo
I learned more from this video than in school
Love the lesson
depends on the temperature. ice is still water , and it's a solid. steam is water, but it's a gas.
I'm affraid there are some people on youtube who are just here to be an asshole, instead of having a good time (or to learning something). Disliking every video they see, except those of Lil wayne or Justin Bieber, is probably the only thing they do here.
Question, say we have bicarb, in goes from h2Co3 and dissociates into hC03- then co2 and water. If we have more con base, or we have more HC03- than H2C03, that means that the solution will be more basic. That doesnt make sense to me, ph is the measure of the concentration of protons, so in the last soln there would be more proton in soln. How can we say that a solution with more H2C03 than hc03- is more acidic if there is less dissociated protons in solution, the protons would be on the bicarb
jazakaAllahu khairun
@lamchop7 Pardon me, however; I have a small correction to your comment. The first group is indeed called the Alkali metals. However the second group is called the AlikaliNE earth metals :)
Great vid! exceptionally helpful!
disassociate is also an accepted word. = dissociate. although the latter is less awkward to say.
Sal, can you please make a video on LEWIS acid and bases.. using pushing (curved) arrows? im having some trouble understanding the material in class
When you add the Hcl to the water, why does the H+ cocentration in the water increase if the added Cl also adds to the overall amount of molecules in a defined amount of molecules? My thinkinig: the H+ concentration in the "solution" should only increase if number of Cl was < Oxygen molecules? Where is my mistake in thinking? Does anyone know? Thanks!
Another question: what determines the fact that acids prefer dissolving in the aqueous solution than stickiing together? Thanks again ;)
Good video, but he incorrectly refers to Group-1 of the Periodic Table as the "Alkaline Earth Metals." That is Group-2; Group-1 is the Alkali Metals.
cramming for finals -__-... thank you khanacademy
Hey Sal, small correction here.
The Group 1 elements are called the Alkali metals. Alkali earth metals are the group 2 elements.
Anyways, thanks for the videos- really helpful. Keep them coming!
Everyones ignoring u since 12 yrs
for acids NAOH will dissociate in water so it becomes Na+ and OH- will the hydroxide bond with a hydrogen making it water or with what will it bond with
does H+ cause acidity?
segheir hicham Yeah.
Thank you for making this video.
Strong independent acids who don't need no alkali
Isn't H20 written as (l)?
@GreayStatia watch the video before this video if you don't understand.
hooray for speed learning...exam in 20 minutes :S
If I pass...thank you a bazillion times!!!
What are the ions left over from the acid's "donation" of a proton doing in the aqueous solution?
thanks all is good i enjoyed your teaching
ty very much butttt i didnt understand this part--> 8:16 if it consumed X how come you got 2X? one for each molecule .. is there any video explains this part?
Thank you so much for this video! The explanation was so great and clear =]
How do you know when to put the plus or minus symbols by them? Only when they're aqueous and disassociate?
the "fancy font" is just danish and Norwegian letter Ø or ø. It is because Brønsted was Danish pronounced liked the vowel in soeur (sister in french) :)
Khan u r great!
How did it go?
I think you could've done it... I had 1 Chem lesson to learn in 4 hrs, and I got a 95 on the test.
I would say good luck, but youtube says the post was 6 days ago, so your test is over.
@fiskcam nah we use (aq) not (l)
how come in my organic chem class NaOH is considered a weak base; R- > NH2- > Sodium acetylide > CH3ONa > NaOH ??
The speaker is absolutely cuteee lol
great video, thanks.
i think this is some great teaching! :)
thank you
What is the link to the previous video?
Beautiful!
@lollmaoroflhahaa No, water should not be liquid because it is in an aqueous solution (it is in water) I know it sounds redundant but technically, you would say that it is in an aqueous solution because that helps you see that it is dissociating. Water in water is an aqueous solution. He is trying to show that acids and bases react in aqueous solutions.
"Wishy-washy" LMFAO
Keep going mr salman khan
استاذ اونلاين خاص لك
Mathmatics
Physics
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Thank you for the video:) It really helped me out with Science:)
all these colors make me feel like im on acid
Should'nt water be (l) and not (aq)?
so basically strong acid can break into two parts for ex. hcl=h+(aq) + cl-(aq)
yep strong acid will completely dissociate weak acids will only show partial dissociation
oh wow, i had my chemistry finals today and i watched the videos until here, i stopped watching them and i left for my exam and guess what? i could have solved 2 questions which i did not if i would have looked just this one video! :(
The ion is a molecule.
@CherryTomato09 Water is a liquid not Aqueous. And to my knowledge there's no such thing as an aqueous liquid - its one or the other.
UHM,can i just ask how to solve this kind of problem: What is the pH of a 0.040M ammonia solution at 25 degrees celsius?? :)
Only our shitty lecturers would downvote videos like this, taking what they teach in 3 hours and effectively teaching it in 18 minutes
what happens to the OH then after dissociating from the base ?
learned a lot
thanks
Why would BF3 exist if Boron needs four bonds.
Just a heads up for anyone doing UK exams (and our crappy mark schemes), most boards do not accept disassociate. I lost marks this way :/
great video! thanks!
Wait wouldn't that last reaction result in one amino acid molecule?
12:25 you spelled proton wrong it bothered me alot but thanks for the video youre soooooooooooooooooooooo awesomeeeeeeee :)
i still dont get how to find out if a solution is an acid or a base! :(
At 8:14 why does H20 turn into H30+ in the reaction? How does that happen?
That's because a single H+ ion is extremely unstable and reactive. It cannot exist on its own. Therefore it goes and attaches itself to the hydrogen atom from a water molecule, thereby increasing the number of hydrogen atoms in a water molecule from 2 to 3. The water molecule becomes hydronium molecule.
Come teach at UC San Diego please
In the B Lowry Base, it's not that the "Li+ has accepted the fact that it has a proton +" that make it a base, it's that the OH- ion can ACCEPT a proton (H+) out of the solution and make a water molecule - thus it is a proton acceptor.