Acids and Bases, pH and pOH

[@nickreichert7597]

In 3 5-10min videos (approximately 30min max), you have successfully taught everything that my professor taught over 210 slides in a month. You are a blessing Dave!!!

[@liv3197]

SAME THOUGHT

[@josefranciscovisconti1048]

So far I've had 2 Chem teachers for intro chem to science majors. My first teacher had ZERO language precision and my second teacher talks waaaaay too much and takes way too long to explain everything/anything. Professor Dave is very precise with his language and very concise with his content. In a world where Tik Tok, Insta, Reddit and Facebook ruin your attention span the hero we always needed is Professor Dave. If you ever read these comments I want you to know: You're gonna do a lot of good in this world with your videos Professor Dave. I will petition my college to have you come as our commencement speaker once Covid Season is past us. Keep at it. You're the real MVP.

[@ProfessorDaveExplains]

Haha I would totally do a commencement speech!

[@ramunasstulga8264]

As a person with normal attention span in the social media era I can confirm this is indeed very straightforward explanation But to be very straightforward it means you got to cut off a lot of information that may be important to know, it's not an issue for teaching the basics of the concept though. That's why I don't think there is such thing as a "better teacher" each person has unique approach to teach.

[@melancall5960]

How's your program? Given the timeframe I'm assuming you're either on break or Year3 of your major!

[@sarahharris867]

1. Thank you for not dressing up like a nerd (or not dressing up) like many other science tutorial videos out there. It's insulting to us in the science world. 2. I'm a senior chemical engineering student, and I watch your videos all the time. It's amazing how coming back to basics is essential to understanding more complex material. I'd even argue the basics are the more difficult to learn. 3. Thanks for your contribution to teaching science in a way that anyone can understand. Your summaries frankly cover the main points of entire courses I've taken (though I appreciate that studying and practicing the details is very important, too).

[@NewWesternFront]

"I'd even argue the basics are the more difficult to learn." More on this? interesting thought

[@cabbage5114]

@@NewWesternFront thats not an argument its a plain fact.

[@NewWesternFront]

@@cabbage5114 what makes the basics more difficult to learn?

[@ruthsmarie]

@@NewWesternFront you have to take the information and believe it regardless because its true. Then you will have to apply it to everything else you learn. If you dont learn the basics, you will not understand anything.

[@Iampinklover]

Been saving my grade since g12. I'm already on my 2nd year college. You doing good man.

[@csdavidnguyen]

Hey Prof Dave, I'm a pre-med student planning to take the MCAT early next year. Your videos are making the review process straightforward. Thank you for what you do!

[@JaketheMotorhead]

How's it going?

[@johnathanzielinski4084]

I literally do not understand how I did not understand this before, you explained this very well and I thank you for that.

[@RutwikPandit]

you are awesome you should know that , you teach better chem than my teacher okay

[@ProfessorDaveExplains]

+Rutwik Pandit thanks kindly! spread the word!

[@vimalshukla7651]

Professor Dave Explains i m a big fan of urs

[@nickkhormaei8030]

honestly same

[@rajdeepsingh1662]

It's one of the most underrated channel

[@void-h2n]

hows ur life been

[@sehmio]

Hi professor Dave that last table suddenly made sense of everything. My life is now complete

[@vinodkumar-dg5kf]

I'm here for the opening song 😂😂😂

[@caroltuifua5184]

My 3year old son sings this song

[@letsdothis1543]

That's really funny haha 😂

[@wildndetroit]

It's the horn for me 😂

[@JeremyLambright]

I had been struggling with understanding conjugate acids and bases. Within the first two minutes of your video, I understood a concept that I had been struggling with for weeks! Thanks Professor Dave!

[@salmakazmi4995]

You rock :D love your simplicity, clearness and how brief you are.

[@DeniseP]

Thanks!

[@AnzzCheatedOnMarkWithHaechan]

These days all what I watch on KZbin is your vids Hopefully I'll pass my biochem exam

[@michellequinn7721]

This is super helpful and clarifies concepts in my text that I was not able to get my head around. thanks

[@legendary6790]

This guy teaches better than the public school that my teacher has us watch him for lessons. Tells you a lot about our education system.

[@lulcy789]

my boy professor dave you now you are a lifesaver

[@thomasalexander1563]

This videos is great Professor.. And this educative videos is consistent,, Should be more subscriber..

[@ProfessorDaveExplains]

i agree, please tell your friends to subscribe! :)

[@charlottestow248]

here in 2020-2021 school year where all my classes are online god bless this man

[@avinashbabut.n4123]

Very great animated explanation.

[@donnyltd6476]

Around 4:45 Professor Dave explains that an iodide ion is more stable than a flouride ion because of the difference in area for a charge to diffuse through, he then proceeds to say that also electronegativity plays a role but explains with a different set of examples. What I would like to know is how the electronegativity of iodide and flouride determine which atom is more stable? I still find it hard to accept that the iodide ion is more stable, most atoms love to exist as ions coz it's more stable. If a flouride ion has a better hold on it's electron than iodide, plus has a larger electronegativity then how come the iodide atom is apparently more stable? Someone please clearfiy this to me, before I lose my faith in the wonderful consistency of Chemistry!

[@randewshakya8066]

The iodide ion (I⁻) is more stable than the fluoride ion (F⁻) because iodine is much larger, allowing the negative charge to spread out and reduce internal repulsion. While fluorine is more electronegative and holds its extra electron more tightly, this creates a high charge density, making the fluoride ion less stable. In this case, the larger size of iodine outweighs fluorine's higher electronegativity in determining stability.

[@AbdelmoneimAAyed]

I really want to thank you for your teaching style and delivering complex information in such a simple, lovely way. Thank you because you made it possible for me to learn! You are making science understandable for us. Please keep going, Dave!

[@ready2learnyup990]

So just to clarify, at 4:48, it is predominantly due the molecular geometry, and its effect on the molecule's polarity, that H2O is much more inclined to donate a proton than CH4? And when water donates a proton, how, or would it effect its electron distribution among its orbitals (for example, s&p orbitals)?

[@ProfessorDaveExplains]

no, very little to do with geometry, it's simply that an oxygen atom is so much more capable of accommodating a negative charge than a carbon is, due to its electronegativity. after donating a proton, the lone pair left behind will occupy the same orbital it did beforehand.

[@sydneymae4135]

thank you so much pls know what u do is sooooo helpful idk where i would be without these

[@rittenbrake1613]

6:24 is it "weak acid ...generating some conjugate base instead of conjugate acid?" I LOVE your Channel , I keep rewatching it for revision , Love u professor

[@kripashankarshukla4073]

Sir I feel very sad about you because you work so hard, answer to all the questions then to your channel is subscribed by less number of people. But you continue with your good work and I will tell to my friends about your channel and to subscribe it and thanks for the damn good explanation

[@ProfessorDaveExplains]

well i think it's growing at a decent rate, but by all means i can use all the help i can get so please do tell all your friends to subscribe!!

[@whitefeather8387]

Thanks professor u gave me a life changing definition I finally understood about what an conjugate acid and base is Its been bugging me for past 2 years

[@vindyakelum90]

Very clearly explained. Thank you professor ❤❤

[@RWL_Channel]

Your awesome for review I shared you to my teacher

[@saragreen1143]

1 hour of textbook reading vs 9 mins of this... hmm I wonder what I'll choose

[@SentientBowlofRaisinBranCereal]

You are the most helpful outside-of-class resource for Ochem that I've found, by far! I really appreciate the amount of effort you put into all of your videos. You are the bomb!

[@onlymanoj0]

Thanks for giving us short topic videos it's helping me much as I didn't expected and also you are better than my chemistry teacher

[@AmyAmy-er8bp]

Lich chgitein inch er. Apply sodium bicarbonate mixed with water on your hands every day. It treats a thing or two.

[@reborneducation7350]

This video clears most of my concepts on ionic equilibrium

[@mitchellgardiner6863]

Bad professor with the buttons down lol. Bless you Dave you're doing gods work!

[@kripashankarshukla4073]

Sir I love your channel and I am your big, big, big, big fan

[@mem.8323]

I liked the way you explain and communicate the information👏💜

[@tyephan7475]

Thank you so much!! This was one of the only sources I could find that explained how to predict the stability of a conjugate base using atomic structure. I knew there had to be something that determined it, but most sources I found just said to memorize the list of strong acids -_-

[@berendkiezelsteen]

2:49 "That's [meaning [H3O+]*[OH-] ] the fraction of water molecules that are ionized." Isn't this false? Namely, by the fraction being small ([H3O+]

[@ProfessorDaveExplains]

Kw is the product of hydronium and hydroxide conditions, not the sum.

[@ledepotesta]

minute 4:00 - you say "whichever atom is losing a proton..." do you mean whichever molecule is losing a proton? As with HCl, it is not a proton integral to the Cl which is leaving, but the H from its ionic molecule?

[@cheatcoder1852]

hi at 4:51 im new to the. concept so im a bit confused, so how does oxygen lose hydrogen faster than carbon if oxygen wants the protons because its negative; or is it because methane is more stable than water that's why methane won't lose hydrogen?

[@shaqisthebest4926]

Thanks for getting straight to the facts ‼️

[@bringbackmemesineurope1576]

I love the videos and how well they explain everything but its impossible to take notes without writting down almost every sentence in the video 😂

[@cabbage5114]

thats just how concise he is

[@RealTwisted-]

The intro is hilarious 🤣

[@imosdefinite]

honestly amazing. 10 min video, made 7 pages of notes from it!

[@ElPurroco]

You are the best human to pass on information !!! as a teacher you get an A+ , thank you so much for your videos ...

[@noel5544]

You are the GOAT amongst the KZbin teachers

[@reshmabanu3926]

U kind of help me with All my confusions. Thanks

[@user-lm5js5dg1i]

At 6:26, I'm confused...is it supposed to say "generating some of the conjugate acid" or "generating some of the conjugate base"....hmmmm....

[@ryandavis3393]

Yep pH have to know what to be a good farmer the grow anything with her organically or especially in organically what's hydroponic of soil you still have to know about pH value acid or alkaline scale as you know some may not goes from 0 to 14

[@claudelorrain-bouchard6941]

5:00.... I'm confused as to how the calculation for "a carboxylic acid is about a trillion times stronger an acid than water" was made.... Is it because we calculate the pH of aqueous solutions of carboxylic in water, so the concentration of carboxylic acid will make the overall solution's pH vary? I haven't quite understood pKa yet, but here's what I found: "The pH of 1.0 Molar solution of Ethanoic Acid is 2.4. The pKa (dissociation constant) of Ethanoic Acid is 4.76 at 25°C. " so in regular water we have 1*10^-7 hydronium moles per liter in ethanoic acid solutions, that concentration is now 1*10^-.2.4 moles of hydronium per liter. So there are around 39811 times more moles of hydronium in an ethanoic acid solution than in plain water.... How did we get to trillions? What is meant by "stronger" if it's not the concentration of moles of hydronium ions per liter?

[@ProfessorDaveExplains]

pKa of water is around 16, pKa of a typical carboxylic acid is around 5, that's 11 orders of magnitude so closer to 100 billion, but can be much more depending on the carboxylic acid. pH is not an appropriate way to compare compounds because it is a measure of hydronium ion concentration that is specific to a solution. A solution can have a wildly differing pH depending on concentration of acid/base.

[@KaitokiNohara]

Thank you Prof.Dave this has helped me a lot

[@hennanoor6346]

i watch your videos religiously, thank you professor dave!

[@adhiyanthaprabhujeyashanka2091]

What does that mean?🤔

[@nicoletsang8884]

also when solute is dissolved in solvent, shouldn't the strength between solvent-solute be stronger than solute-solute/ solvent-solvent? But in the equation HCl + H2O --> H3O + Cl , how come solute-solute which is ionic bond(HCl) is stronger than solute-solvent which is ion-dipole(H + H2O)?

[@ProfessorDaveExplains]

HCl is not ionic, it's covalent. and when water acts as a base it forms a covalent bond to the proton as well. it sounds like you need to head back a bit earlier in the playlist and brush up on types of bonding and other such principles.

[@Ponpon___]

At 4:30 why is the I- ion more stable? I mean, if it's larger I believe the electron he gained is further from the nucleus, isn't it? So it can donates the electon more easily and sooo it's a stronger conjugate base and the acide should be weaker? I know you're right ofc I just want to say I don't understand. :) Hope you can answer me fast, thank you for your videos!!

[@ProfessorDaveExplains]

it mainly has to do with the size of the ion, iodide is much larger and can diffuse the negative charge about a greater volume, kind of like the way a formal charge is stabilized by delocalization through resonance.

[@gouravdutta9464]

Thx sir for making chemistry more easy to understand 😃

[@raspberry765]

the background music at 8:09 reminds me of 5 nights at Freddies

[@manojrai3208]

You're just awesome💜💜💜, I really hate chemistry but this is the first time I'm questioning myself can chemistry ever be so interesting?😂

[@dannychenski687]

0:38 dumb question: what does that mean about the Hydrogen atom itself? It's not literally just a proton, is it?

[@hydromic2518]

Without any electrons, it’s a proton

[@vincentxie3090]

damn, learning this is complicated

[@Psychedt]

Amazing summary. Thank you

[@sicparvismagna9586]

You are one of the best chemistry teacher I've ever come across 😁..

[@manojrai3208]

Thanks for this wonderful video

[@aaronkim8930]

This man is carrying me through Chem 12

[@ceoofbrunestud5894]

2:51 how did we get 10x10^-14

[@raspberry765]

Phenomenally explained!

[@littlelimabean7130]

I'm confused in the answer at 8:20 where you add pH to pOH = 14. How did you get the 14?

[@ProfessorDaveExplains]

It's from the 10^-7 M concentrations of the two ions.

[@littlelimabean7130]

@@ProfessorDaveExplains oh-thanks.

[@vanishreemuralibaba3232]

Just curious to know conc H3O+

[@ProfessorDaveExplains]

no, greater than

[@malakahmed2952]

How is that???isnt it right that if the pH

[@kadiansenoj1849]

you are awesome!

[@Remsces]

if acid/base and their conjugate are opposite in strength, why it is not true for ammonia and acetic acid? which is weak in acid/base and both weak in conjugate acid/base, since a weak acid (doesnt want very much to lose protons) is an weak acid in first place because its conjugate is not very much more stable which will form a strong base (one who strongly need to accept a proton), as same to the opposite

[@brittniep9219]

Very useful! Thanks! :) I really like the chart in particular

[@whenthethebeansstrikeback6728]

There are two types of acids, the one that melts you, and the one that thinks you're fighting a Dragon wearing a maid dress in outer space

[@hallefitzgerald3878]

you rock

[@asmatkhan4365]

Sir is it possible u expain these things little prolong and in detail that we get full

[@oliviachumay]

Thank you Dr. Dave

[@amygarcia2202]

Thank you Professor Dave!!

[@chhayvannkhy6062]

thanks sir for a great explanation...

[@niyamraj_ach]

Thankyou sir ❤️❤️

[@priyanshupoddar2097]

hey dave ur great

[@vitalbuggy6907]

Professor Dave, I love you. Please teach me more chemistry. Thank you.

[@titirmajumdar3730]

love his videos............but, can i ask 1 question ? why does he wear the same shirt in all his videos ?

[@ProfessorDaveExplains]

i shoot a whole series in one day!

[@titirmajumdar3730]

oh ! Prof Dave, you are really a genius ! :-) :-))

[@abd11jezabab83]

Oh! how genius u are👌👌👌👌👌

[@msmdkpk2020-xl2vj]

Please tell the answer of the given question? Why aniline is more basic than ammonia in gas phase but less basic than ammonia in liquid phase?

[@shehanperies567]

Professor, can you teach us about pOH, pH and pKw as a seperate lesson?

[@ProfessorDaveExplains]

Why a separate lesson? It's all in here.

[@thatabu]

When calculating acid constants, shouldn’t activities also be used instead of concentrations? Activity coefficients close enough to 1 can be replaced with concentrations but only with smaller ion strengths.

[@hammadmustafa6277]

By the way.... A superb teacher.... But I wanna know why this man never moves his hands in videos😂 it makes ma feel weird.

[@priti637]

You r great sir.....thanku

[@cactuspactus5134]

his little intro music makes me dance every time

[@bugtibaloch3811]

Awesome sir from which country u are sir?

[@meanguitarist1732]

best professor

[@JAYWLEE]

in 1:03 isn't it supposed to be OH-?

[@ProfessorDaveExplains]

the negative charge is specifically on the oxygen so it is technically more correct that way

[@JAYWLEE]

Professor Dave Explains thanks for the reply so a hydroxide ion with a negative charge on O and a hydroxide ion with a negative charge on the H is the same?

[@ProfessorDaveExplains]

Well in terms of just notation, yes, they mean the same thing. But we just need to know that the hydroxide ion specifically involves a formal negative charge on the oxygen atom only.

[@irenechelsia1160]

Make a video on purification of Organic compounds :p

[@shamshadkakar7172]

You are amazing 😍😍

[@swordmas7544]

good stuff

[@ahmedabdurahman5469]

Very important lesson

[@robertwoodson8068]

Accept an electron = acid? Donates = base ? It says proton but atoms don’t donate protons?

[@hydromic2518]

A hydrogen atom with no electrons is basically a proton

[@mimic5121]

Thank you so much 🥰

[@alicechromatica9125]

I have a question Is there a chemical that is considered a weak basic oxide? Most of the basic oxide I researched is mostly strong. Thank you for reply!

[@enterinpeace347]

I can't understand everything:(

[@lifewithG-bengs]

Love it it really helped

[@anugrahchawla2274]

great help...this channel is of.

[@lynnematar3909]

THANKS I HAVE NAJAHET THE TEST BECAUSE OF YOU JESUS!!

[@nyebadr]

Veri funni

[@lynnematar3909]

@@nyebadr YES