Added: 2 years ago
From: khanacademy
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  • 18 people are on acid

  • 16 people are retarded

  • Wishy washy reaction haha thanks for the video!

  • Comment removed

  • 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 "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) :)

  • what video is referring to when he says "we just learned blah blah blah"...?

  • Great video

  • I honestly love you

  • thanks you so much (:

  • it should be "dissociate", not "disassociate".

  • @silvenflame it was clearly a typo.....STFU!

  • @Lakia08 i was just pointing it out. but it's okay, i understand that 60% of the youtube community are assholes anyway.

  • @silvenflame he already said that he is not a gud speller...so why r u saying about it again?

  • @someone20ify He did not clarify the spelling in the video, so I wanted to tell everyone who was watching what the correct spelling was - for their own sake.

  • @silvenflame ohhh ok....my bad!!!!!

  • @someone20ify However, 'disassociate' means 'dissociate', so both MIGHT be accepted. But "dissociate" (what my teachers use) is used more (10.4 mil vs. 975k pages with Google). Wikipedia's article on dissociation does not have 'disassociate'.

  • @silvenflame yeah....

  • TY soooo much! u make me believe I mite hav a chance in chem afterall :D

  • what the fuck is -log?

  • WHAT DOES THIS HAVE TO DO WITH SEX?  I hate getting horny while i am studying....so why the fuck does it say "sex.art and politics"??

  • Water obviously is dissolved in water? Sorry not so obvious :D Its supposed to be liquid state(i think) :D

  • why is it seen as "sex, art, and politics"?

  • @sara4844 LOL i was gonna ask that too

  • I used Khanacademy for my A levels, never thought I'd still be using him at University!

    Wonder when I will stop? Imagine using Khanacademy for your Phd haha. Wouldn't suprise me though.

  • i thought u needed enegry input for things to react, in this case i tought u needed energy for the H+ ion to join the water molecule to become H30

  • @soopa123 The H2O molecule has a lone pair on the oxygen, so the H+ ion will readily react. You only need energy to break bonds, in fact, you need to lose energy in order to make them (in exothermic reactions). The force of the partial charges on the H2O dipole is sufficient to dissociate a molecule, such as HCl into H+ and Cl- (as an example), so no energy is required for such a reaction to take place.

  • 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.

  • i didnt understand :(

  • you said disassociates! haha my profes. would be upset!

  • @cabheat actually, i think he disliked the video 12 times

  • H2O is actually said to be in the liquid (l) state, not an aqueous solution.

  • @fiskcam nah we use (aq) not (l)

  • sal sir .. ur fuckingly ..cool guy to be with .. i m just geting my all studies flashbac frm u !!! cool cool stuff

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  • I thought boron could only have 3 bonds

  • I always hated H3O+..it isn't correct, your H+ joins with not one, but 8 H2O.

  • I really loved the review. Excellent!

  • 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

  • NaCl / KOH <-"The base is under a salt!"

    

  • 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.

  • Of course you worry about pH. You could die if our pH got too high. (our blood pH is roughly 7.5)

  • @Keeggz peace yo!

  • sounds like don lemon lol

  • 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!

  • I learned more from this video than in school

  • you sound EXACTLY like the rapper from Aesop Rock!

  • I keep saying Wishy Washy when im studying LOL, thanks for the vid :)

  • if my teacher explained it like you do,we would all understand better,I always watch your videos for upcoming exams to understand better,so thankyou..

  • who the hell uses the common log anymore?

  • can any1 help me from @6:37, i do not understand the reaction HCl + H20 ---> H3O + Cl,,, (new comer to chemistry)

  • @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).

  • nice

  • 6 ppl fail their chem test

  • 6 people need to actually watch the video.

  • man, if you arent a lecturer, you should apply. The teaching world needs you!

  • LIFE SAVER!

  • You are so totally awesome at explaining this. I feel lost in my biochem class but you really help me understand the concepts. Thank you for taking your time to show us how to understand. : )

  • nice video

  • You are the best man! Keep it up. What you're doing is good.

  • god bless you mahn, u broke everything down for me to understand easily. thanks and kudos to you.

  • Is there a way of focusing on just the Organic Chemistry lectures - I am prepping for the MCAT and that is my weak spot.

    Also, any suggestions for someone of equal clarity who may teach in a similar manner subjects like biology or physics?

    By the way - you are an excellent teacher. Really. God bless and thank you for sharing your talent and knowledge!

  • Should'nt water be (l) and not (aq)?

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  • @lollmaoroflhahaa doesn't matter, but it's (aq) since they partially dissociate.

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  • @lollmaoroflhahaa No because l is for liquid and aq is for aqueous...

  • @JumpingRider13 Yes, so it should be (l), not (aq) because aqueous means 'in solution'. You're suggesting that water is a solute!

  • @lollmaoroflhahaa

    aq means aquous. dont know what that means but it sounds like its describing a liquid so i see your point. maybe scientists were drunk when they invented this crap.

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  • @lollmaoroflhahaa Refers to aqueous solution, which is another way of saying water. Aqueous solution only refers to water, not mercury or any other liquid. It's just a more specific way of saying "liquid water."

  • @lollmaoroflhahaa

    "Should'nt" you learn how to spell? Why are you correcting such small details like I am correcting your grammar? Does the 'H2O(aq)' detract you from your free lecture on acids and bases? I bet most people know that H2O is a liquid just as most people could assume that "should'nt" means "shouldn't".

  • @IRandomlyComment Hahahaha owned! Awesome comment man (or woman), awesome!

  • @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.

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  • You say aqueous weird. It drives me nuts!

  • 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

  • thumbs up, if you only listen to this guy, because he has a deep voice.

  • thank you so much...the videos r very helpful..u make chemistry easier n understandable 4 me.

  • I wish I understood the theory of it all with asid and bases but I guss the reason why after searching I still haven't found it is because it is too complex and is for 2nd or 3rd year students

  • its arrhenious ;)

  • I'm subscribing to your channel. It's a pleasure to get good explanations of science concepts.

  • Very assuring voice intonation. Confident handling of concepts. But it would have been better to make clear---and emphasize---the mechanism of ionization. There's a world of difference in saying that a PROTON was donated to an atom, from saying that an atom has an excess of a positive CHARGE because it lost an electron of negative charge. Understanding that subtlety goes a long way---it's closer to observed phenomena. It's a crucial matter this balancing of electric CHARGES in atoms.

  • Why would BF3 exist if Boron needs four bonds.

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  • @jabberwocky685 isotope?

  • Hi Sal, I owe you millions. You're the master. My text book s-u-c-k-s, for a certainty.

    I logged on just to thank you. I watched just about all of your biology videos. Great job. Great work. Wish I had you for all my class time experience. You're the greatest. Signed Love.

  • small correction sal. water is not aqueous, it is a liquid. water does not dissolve in water. 

  • @sugarcoatedsour actually, water is an AQUEOUS liquid. However you are correct that water cannot dissolve in water because water is a solvent...so a solvent cannot dissolve in a solvent, only a solute can dissolve in a solvent.

  • @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.

  • i think this is some great teaching! :)

  • the 4 people who dislike must be idiots

  • Whahahah i dont get shit!!!!!!

  • @GreayStatia watch the video before this video if you don't understand.

  • awsome vid!

  • thanks a lot !!

  • another small correction... Bronsted lowry is actually Brønsted-Lowry. i think it's a danish discovery named after

    a danish city, hence, the danish name containing the danish letter "ø"

  • correction, brønsted turns out to be a danish scientist. hence, not a city and spelled brønsted.

  • @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.

  • "Water is obviously dissolved in water..."

  • Isn't water supposed to be 'l' as in liquid?

  • 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.

  • I sure appreciate the clarity you bring to this subject

  • could water then be classified as an acid here:

    NH3+H2O ->NH4+ +OH -

    but I thought water was nuetral?

  • @kmart166 naw its an amphoteric substance so it can act as both an acid and a base. it just depends on the situation

  • hcl in h2o is shown but lioh in h2o is not demonstrated . i was expecting to see what lioh +h2o will bring to commit my judgement on oh con increasment . thanks for the hard work .

  • you are truly amazing! your videos help me soo much!!!

  • you are absoloutly amazing mannn !!!

    thank you so much !!!!!

    i hope u get whatever u want by uploding this videos

  • for my chemistry coursework i'm investigating the effect of the rate of reaction when only the congruent base is increased. When i did the experiment i found that it slows the reaction down as the conc. increases, any1 know why?

  • Excellent ...im watching this so i can get an "A" 2mro on my quiz =)

  • for example, why is HF not a lewis base since it possess 3 lone pairs of electrons

  • @TELEPHONEV

    Where has it been stated that HF is not a Lewis base?

  • yah cool vid..thnks..bt hw do u identify a lewis acid without an equation.. if u r jst given a random chemical like BH3..and no reactant..hw can u tell its a lewis acid

  • Doing this for my IB diploma, thanks a bunch for it :)

  • 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!

  • @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!

  • the ø is a danish letter that is pronounced as the german ö

  • very nice vid

  • Thank you.

  • yeah, nice vid

  • nice vid

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