pH and pOH: Crash Course Chemistry #30

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  • เผยแพร่เมื่อ 23 ธ.ค. 2024

ความคิดเห็น • 1.1K

  • @crashcourse
    @crashcourse  4 ปีที่แล้ว +112

    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

  • @anchitrao7374
    @anchitrao7374 8 ปีที่แล้ว +1021

    These videos are ridiculously well made

    • @krishnagoli687
      @krishnagoli687 5 ปีที่แล้ว +24

      Damn they'd be really helpful if they went just a bit more into detail but nonetheless amazing production quality

  • @daiwikdhar6464
    @daiwikdhar6464 4 ปีที่แล้ว +392

    For a second while he was explaining logs, I realized Hank has great potential to start: CRASH COURSE MATHEMATICS!!!!
    Anyone who wants Hank to explain Math plz hit a like!!!

  • @Spycyzygy
    @Spycyzygy 9 ปีที่แล้ว +346

    My chemistry teacher described the water to hydronium and hydroxide as water being so bored that it reacts with itself

  • @foxyred3216
    @foxyred3216 10 ปีที่แล้ว +493

    "p" is an old mathematical symbol for "-log of" hence:
    pH = -log[H^+]
    pOH = neglog[OH^-]
    pKa = -log[Ka]
    pKb = -log[Kb]
    Well, that's what my chemistry professor, Dr, J. Rogers, told me.

    • @kristina1463
      @kristina1463 5 ปีที่แล้ว +16

      THANK YOU

    • @rhythmthukral7857
      @rhythmthukral7857 5 ปีที่แล้ว +3

      Shut up

    • @ScareSans
      @ScareSans 5 ปีที่แล้ว +59

      @Rythm Thukral you misspelled "you're welcome"
      Edit: Jesus I'm an idiot, I meant you misspelled thank you

    • @pollenbunal2101
      @pollenbunal2101 5 ปีที่แล้ว +2

      Arceus The God Pokemon Hahahahahhahahah

    • @aigle_grincheux
      @aigle_grincheux 5 ปีที่แล้ว +8

      Francis Martinez definitely the most helpful thing I ever read
      Especially when I try to learn something about pH for the first time in my life thank you 💜💜

  • @drew.k2385
    @drew.k2385 7 ปีที่แล้ว +204

    "As you can see, the logs turn out to be a mathematical shorthand that saves us from having to deal with very huge or very tiny numbers."
    That makes so much sense now. Why can't textbooks just tell it like it is?

  • @nickracca1993
    @nickracca1993 6 ปีที่แล้ว +106

    "ok so now that you're terrified, I'm here to help"
    -hope someone told me that word earlier.

  • @MasterGus501
    @MasterGus501 11 ปีที่แล้ว +1013

    Man, you're great at chemistry! Have you ever considered cooking crystal meth?

  • @storyspren
    @storyspren 9 ปีที่แล้ว +14

    That pH + pOH = 14 is actually really cool, since it's a nice little shortcut you can take when you want to know either of them and know the other.

  • @MagicallyEmily
    @MagicallyEmily 11 ปีที่แล้ว +76

    I honestly understand chemistry better through these videos than I do through my actual college chemistry course. Thanks, Hank!

  • @pilotmoyafan
    @pilotmoyafan 10 ปีที่แล้ว +466

    I'm still kinda screwed for the test tomorrow....

    • @1nfo663
      @1nfo663 5 ปีที่แล้ว +20

      did u pass

    • @Tutti22
      @Tutti22 5 ปีที่แล้ว +2

      Nameless lol

    • @shaisblind
      @shaisblind 5 ปีที่แล้ว +10

      lol, some guy replies 5 years ago, someone replies 5 days ago..😆

    • @pcrd38
      @pcrd38 5 ปีที่แล้ว +2

      Howd ya do man?

    • @ctsvblk
      @ctsvblk 4 ปีที่แล้ว +2

      ShadowBIRD maybe he died.. like actually

  • @windowsxboxguy
    @windowsxboxguy 8 ปีที่แล้ว +92

    this the type of guy to help me pass my test tomorrow

  • @PerryTheGangsta
    @PerryTheGangsta 8 ปีที่แล้ว +10

    10:05.
    Was that a mistake on his part? The numbers he got from [H^+][OH^-] were 3.5 and 10.5 in the example he used. Thankfully it still equals 10^-14 in the end, though.

  • @SWEm4rt1n
    @SWEm4rt1n 11 ปีที่แล้ว +26

    I love how this series is perfectly synced with my lessons in college so I can repeat my studies while I'm on youtube :D

  • @IndeedJoe
    @IndeedJoe 11 ปีที่แล้ว +1726

    finals anyone?

    • @Togerax
      @Togerax 11 ปีที่แล้ว +34

      You know it :D

    • @RedMinorFilms
      @RedMinorFilms 11 ปีที่แล้ว +58

      Sadly my finals are way above the the stuff in this video

    • @thatnonamedude
      @thatnonamedude 10 ปีที่แล้ว +7

      hi Unfortunately, me too

    • @felixwiedenmann8625
      @felixwiedenmann8625 10 ปีที่แล้ว +4

      Yep it got me too

    • @Gravios74
      @Gravios74 10 ปีที่แล้ว +2

      Pff, yes

  • @jessjms1181
    @jessjms1181 8 ปีที่แล้ว +637

    Why is water so cute

    • @jessjms1181
      @jessjms1181 8 ปีที่แล้ว +53

      Dan Vegas I don't remember why I said it to be honest

    • @braveheart3847
      @braveheart3847 8 ปีที่แล้ว +11

      lol

    • @dmoneyswagg64
      @dmoneyswagg64 7 ปีที่แล้ว +15

      Dan Vegas why did I like this comment?

    •  6 ปีที่แล้ว +11

      because it obeys you, molds to your every desire, because it's the girlfriend you'll never have because all you care about is yourself

    • @chemistrychannel5021
      @chemistrychannel5021 6 ปีที่แล้ว +14

      Because it's bent 😂

  • @Valdagast
    @Valdagast 7 ปีที่แล้ว +50

    And the pH of blood should be between 7.35 and 7.45, _not_ (as I read on an alternative medicine site) 5 and 9.

  • @JuiceCarver
    @JuiceCarver 10 ปีที่แล้ว +35

    Thanks Hank! My teacher has been repeating the same material to us for 2 hours and nobody got it. Praise Hank for 10 minute crash courses!!

  • @2357y1113
    @2357y1113 11 ปีที่แล้ว +6

    Crash Course, thank you so much for believing in your audience and therefor not being afraid to show actual math(s) and formulas.
    You're the best!

  • @Abominatrix650
    @Abominatrix650 8 ปีที่แล้ว +38

    I'd just like to say that during the Kanye bit at the beginning, there's a Damocles Sword above his head. Thought we wouldn't notice. But we did.

  • @fluffy3355
    @fluffy3355 4 ปีที่แล้ว +80

    god i hate how chemistry has so much vocabulary

  • @hazzacookiemofo
    @hazzacookiemofo 10 ปีที่แล้ว +9

    I love all of the pop culture references in the show, like Deadmau5 when Hank was talking about Strong Bases

  • @BJB104
    @BJB104 2 ปีที่แล้ว +1

    Man, these vids helped me big time when taking chemistry in college nearly a decade ago. I work as a chemical technician in the semiconductor field nowadays, but rarely use theory and forgot quite a bit! Now watching again to give myself a little refresher for teaching my nephew with his high school classes. This is rad! Forgot how much I really liked this stuff..

  • @josiahklein70
    @josiahklein70 8 ปีที่แล้ว +432

    Crash Course Mathematics, anyone?

  • @Sophie-wf3ex
    @Sophie-wf3ex 8 ปีที่แล้ว +139

    "...in the example we just did the pH was 5.4 and the pOH was 8.6" (10:02)
    erm... Wasn't it 3.5 and 10.5...
    Interesting editing.

    • @jungsooneul8879
      @jungsooneul8879 7 ปีที่แล้ว +3

      I thought so too...

    • @miav2046
      @miav2046 7 ปีที่แล้ว +12

      i caught that too and threw me off. kept rewinding thinking I missed something, at least our answers 3.5+10.5=14

    • @arianasanchez4746
      @arianasanchez4746 7 ปีที่แล้ว

      Damn. I'll look for another video to study 😭😭

    • @ScholaBayBee
      @ScholaBayBee 7 ปีที่แล้ว

      sameee

    • @plazmavolt1238
      @plazmavolt1238 6 ปีที่แล้ว

      yeah...

  • @itskankan
    @itskankan 11 ปีที่แล้ว +8

    That kanye power thing was the best thing I've seen on youtube this week! Keep up the creativity :)

  • @riyasingh7287
    @riyasingh7287 9 ปีที่แล้ว +293

    Can we have CrashCourse Physics? :/

  • @nelliesuto8007
    @nelliesuto8007 6 ปีที่แล้ว +1

    How great would it be if Crash Course created an Organic Chemistry playlist??? IT WOULD SAVE MY LIFE!

  • @krisxcross
    @krisxcross 10 ปีที่แล้ว +4

    This helped me so much for my AP Chem class! We have to do a reading on this over the weekend and I didn't understand anything until I watched this video and also the acid-base reactions video! :D

  • @xXgracexX333
    @xXgracexX333 11 ปีที่แล้ว +11

    My chem teacher is awful...she should honestly just show these videos!!! They help me so much to understand! Thank's Hank!!!!

  • @ScareSans
    @ScareSans 5 ปีที่แล้ว +5

    "all your base are belong to us"
    i don't even remember where that's from, but i see it everywhere. for example, my younger bro was watching rescue bots, a transformers show for small children, and a character actually said that... it's everywhere

  • @jbkjbk1999
    @jbkjbk1999 9 ปีที่แล้ว +120

    English speakers trying to pronounce Ø, Æ and Å never gets old.

    • @MrInsdor
      @MrInsdor 9 ปีที่แล้ว +14

      He does it pretty well though, ä ö and ü mostly get "ignored" and will be pronounced as a o and u : ^)

    • @eliotoboyce5738
      @eliotoboyce5738 9 ปีที่แล้ว +8

      +MankeyFrankie GöØd fØr ü

    • @landonhillyard
      @landonhillyard 9 ปีที่แล้ว +2

      +Totally Not A Cylon Lived in Norway for 2 years. It took a bit for people to think I was from Norway, but eventually I got it.

    • @IhaveCupcakes
      @IhaveCupcakes 8 ปีที่แล้ว +1

      +Totally Not A Cylon I must agree

  • @PartyChicken407
    @PartyChicken407 11 ปีที่แล้ว +12

    Thank you guys so much for doing these videos. I'm not even a chemistry student, just a guy who was curious about world history (found the other crash course videos) and then I found these. Amazingly well put together and fun.
    I wish I knew what I know now back when I was taking high school science... I would have asked some really interesting questions and come up with some cool experiments.

  • @ScarecrowWoods
    @ScarecrowWoods 11 ปีที่แล้ว +58

    i have no idea what im watching
    i think my brain is melting

  • @premgill2699
    @premgill2699 8 ปีที่แล้ว +14

    10:00 The video makes a error
    Hal says the PH of the example we just did is 5.4 + 8.6 = 14. This is wrong.
    Actually, the PH of the example is 3.5 + 10.5 = 14.

    • @veditababuta4201
      @veditababuta4201 8 ปีที่แล้ว +2

      That' what I thought too, I watched the that part over 4 times to make sure.

  • @meganyamamoto31
    @meganyamamoto31 10 ปีที่แล้ว +1

    4:40 H20 -> H30+ + OH-
    Not sure if anyone else has pointed this out but I don`t think this is balanced. It looks like a hybrid equation of H2O -> H+ + OH- and 2H20 -> H3O+ + 2OH- ?

  • @nmubunny5395
    @nmubunny5395 10 ปีที่แล้ว +5

    Your videos are really helping me with my MCAT, thank you so much!!!

  • @gwendance
    @gwendance 11 ปีที่แล้ว +1

    At 01:42 where it says that Hank is a mass of incandescent gas, is that a reference to the "Why the Sun Burns" by They Might Be Giants?

  • @f0gman_
    @f0gman_ 11 ปีที่แล้ว +4

    Thank you so much Hank! This crash course actually helps me a lot in school.

  • @manimaima
    @manimaima 11 ปีที่แล้ว +2

    These videos are really helpful. You see I’m in year 10 and i really like chemistry. I’ve even started to learn AS chemistry.
    These vids make chemistry even more fun!

  • @neutralpresident4361
    @neutralpresident4361 10 ปีที่แล้ว +245

    My pH would be 7 because I'm neutral.

    • @FROPDESAI
      @FROPDESAI 9 ปีที่แล้ว +8

      Neutral President Neutral President is neutral.

    • @darraghbrennan8549
      @darraghbrennan8549 7 ปีที่แล้ว +4

      Neutral President ii

    • @mihajlojovanovic7651
      @mihajlojovanovic7651 6 ปีที่แล้ว +33

      Mine would be 14 cause I'm basic

    • @tobey1684
      @tobey1684 6 ปีที่แล้ว +2

      @@mihajlojovanovic7651 lol

    • @mollyhorse
      @mollyhorse 5 ปีที่แล้ว +1

      @@mihajlojovanovic7651 and caustic! Lol

  • @DoctorSkater
    @DoctorSkater 11 ปีที่แล้ว +2

    I already know every subject you have gone over in crash course chemistry. And yet I am nonetheless entertained by each and every one. You rock Hank :).

  • @allenhoggan7675
    @allenhoggan7675 5 ปีที่แล้ว +19

    Deadmau5 was the last thing I was expecting to see in Crash Course XD

  • @19U91-l6s
    @19U91-l6s 8 ปีที่แล้ว +8

    You save lives man!...🙌🏻🙌🏻

  • @HarryBungholio
    @HarryBungholio 10 ปีที่แล้ว +9

    Just want to say thank you for helping me understand chemistry. I wish you were my teacher. Or that I could just watch TH-cam videos in my class rather than listen to a professor who cant explain anything. You rock. Thank you.

  • @shannonbaker2254
    @shannonbaker2254 9 ปีที่แล้ว +3

    Senior Chemistry in Australia teaches you that pH stands for parts Hydrogen. Which in my opinion is probably the most logical way of looking at it. Even if it isn't historically accurate.

  • @bvbandiss
    @bvbandiss 9 ปีที่แล้ว +3

    These videos have helped me so much in my chemistry class. Thank you 😊😊😊

  • @captainsmurk
    @captainsmurk 11 ปีที่แล้ว +1

    I'm such a huge fan of this guy and these videos! Awesome.

  • @metadolle8925
    @metadolle8925 8 ปีที่แล้ว +40

    I thought the "p" came from the mathematical p, which stands for -(log). My chem teacher likes to tell us that to find pH or pOH from [H] or [OH] we have to "p on the concentration" -_-
    I will never, ever be able to look at pH scales without hearing him crow, "What do you do? You p on it!"

    • @makeitmusical
      @makeitmusical 8 ปีที่แล้ว +6

      +Josie Serpan Strangely, this helped me.

    • @metadolle8925
      @metadolle8925 8 ปีที่แล้ว +2

      Sarah Hudak Awesome, glad to hear it XD

    • @h6ly
      @h6ly 6 ปีที่แล้ว

      well tbh p stands for power and H stands for hydrogen, im no scientist but pH is the power of Hydrogen

    • @ScareSans
      @ScareSans 5 ปีที่แล้ว +2

      @Jordan_acidic Hank himself said we could not confirm if pH means power of Hydrogen.

  • @samanthalee36
    @samanthalee36 11 ปีที่แล้ว

    I'm glad I'm not the only one who feels the need to correct Crash Course chemistry videos. I haven't been watching in a while, so I had hoped they had gotten less sloppy.

  • @MegaMike327
    @MegaMike327 7 ปีที่แล้ว +10

    Universities should uses CrashCourse as it was way more interactive then Khan.

  • @justinhill6206
    @justinhill6206 11 ปีที่แล้ว +1

    to who ever matched the musical genres to the pH states you are a genius nice work

  • @pri7974
    @pri7974 9 ปีที่แล้ว +4

    Wish my chem teacher taught half as good as Hank teaches.
    Btw Please bring crash course physics soon :))

  • @rithwiqnair537
    @rithwiqnair537 9 ปีที่แล้ว +1

    Helped me a lot.... Doing great Hank Green!

  • @jeffshubert
    @jeffshubert 11 ปีที่แล้ว +3

    Great job Hank! It would be interesting to learn about the dissolving powers of really strong acids.

  • @stevenn2382
    @stevenn2382 6 ปีที่แล้ว +2

    Thank you so much! We went over this in chem and I thought I knew it well but this explanation helped me much more!

  • @johndou423
    @johndou423 6 ปีที่แล้ว +12

    Kw is only 1.0*10^-14 at 25 degrees celsius tho

  • @MD-nf5rr
    @MD-nf5rr 5 ปีที่แล้ว +2

    you're good at this man, keep it up!

  • @TheMisleduser
    @TheMisleduser 6 ปีที่แล้ว +34

    can't lie. I should have been watching these instead of reading the text

  • @babycash08
    @babycash08 10 ปีที่แล้ว

    I literally almost had a mental break down in class yesterday. Today I find this goldmine! Life is really good LOL

  • @thelark2049
    @thelark2049 9 ปีที่แล้ว +10

    pH stands for: "potentia Hydrogenii" which is a newlatin word.

  • @Poeticlibrarian
    @Poeticlibrarian 9 ปีที่แล้ว +1

    Hank Green is so great for helping out kids in school regardless of the age

  • @shereitograce7844
    @shereitograce7844 9 ปีที่แล้ว +9

    You explain chemistry so well. I feel I have won a higher level of knowledge

  • @BlooregardQKazoo-ff6wb
    @BlooregardQKazoo-ff6wb 11 ปีที่แล้ว +1

    This is exactly what I am going through in school right now! This has really help me thanks.

  • @abubakrakram6208
    @abubakrakram6208 9 ปีที่แล้ว +4

    0:43 It's just meant to signify "the power of"?
    I believe that's how my Chemistry teacher explained it to me. Of course, I'm not sure how much anyone would want to trust his explanation, considering I needed to go online to learn the material. I don't even know why I posted this comment; I'm quite sure Mr. Green knows his material far better than my Chemistry teacher.
    *EDIT:* He almost immediately says this is a possibility. I probably should have waited until the end to comment.

  • @JonathanDery
    @JonathanDery 11 ปีที่แล้ว +1

    I just realised... I've been watching Crash Course since hte begining! Thanks for making me realise that, Hank!

  • @rachelgordon8330
    @rachelgordon8330 9 ปีที่แล้ว +11

    I was taught that pH came from French: pouvoir Hydrogene. Like, the ability to release the hydrogen ion and create hydronium ions...

  • @jessicajohnson3986
    @jessicajohnson3986 6 ปีที่แล้ว +1

    Chem regents tomorrow, and even though I know we don't need to know too much about this stuff in depth, I started freaking out. I know I can count on CrashCourse to relieve my sudden, absurd lack of knowledge :)

  • @nicktimmerman8562
    @nicktimmerman8562 5 ปีที่แล้ว +8

    0.5 speed and I couldn't stop crying

  • @recklessroges
    @recklessroges 11 ปีที่แล้ว

    Great video, (as always). What might confuse some people is that the word "base" is used in three different ways in this video: Chemistry: base as the opposite of an acid, Math: base 10 logarithms, and geek-cultural-reference: "All your base are belong to us" which refers to a military encampment. We just need to know who is on first to be really confused. "What pH does a log of base 10 have on your base?"

  • @boboloconow
    @boboloconow 11 ปีที่แล้ว +4

    Thank goodness that I have CrashCourse to depend on before my exam

    • @QUARTERMASTEREMI6
      @QUARTERMASTEREMI6 6 ปีที่แล้ว

      +John Doe Absolutely! ;)
      Best resource ever made.

  • @Dixavd
    @Dixavd 11 ปีที่แล้ว +1

    Yeah, I knew it would be something that would have to be true by definition. I was just impressed that there happened to be a model for giving the information of the H+ and OH- concentrations that aligned with using that fact so perfectly. I thought it was really neat that to represent this Chemistry information, they used this trick to make it so simple. Thanks for explaining though (I've always been bad at logarithms anyway).

  • @000TheMatheus000
    @000TheMatheus000 8 ปีที่แล้ว +62

    here in brazil the p means potential, the potential of donating Hidrogen atoms.

    • @kilroy3368
      @kilroy3368 8 ปีที่แล้ว +1

      That makes a lot of sense, I wonder why the rest of the world doesn't?

    • @___xyz___
      @___xyz___ 8 ปีที่แล้ว +6

      come to brazil

    • @rafaeljc12
      @rafaeljc12 8 ปีที่แล้ว +1

      gibe money plox

    • @chloegiraud2582
      @chloegiraud2582 8 ปีที่แล้ว

      +Kilroy 336 in Québec too it's potential

    • @seantheguy1391
      @seantheguy1391 8 ปีที่แล้ว +1

      You spelled hydrogen wrong

  • @JoshuaLoganjoshuadlogan
    @JoshuaLoganjoshuadlogan 11 ปีที่แล้ว +2

    This is a great video series. Thank you for taking the time to make this!

  • @Adnan-lt5rn
    @Adnan-lt5rn 9 ปีที่แล้ว +29

    I'm a simple man, I see Kanye Reference, I thumbs up.

  • @Froggeh92
    @Froggeh92 11 ปีที่แล้ว +1

    Yes. the pH lets you know how Acidic/Basic your product is. The more balanced the formula the more gentle it is on your skin/hair and is friendlier for daily use.

  • @avazhalid7129
    @avazhalid7129 6 ปีที่แล้ว +3

    The letters pH stand for the French words (pouvoir hydrogène), meaning "hydrogen power"

  • @IllyaLeonovMorganFreepony
    @IllyaLeonovMorganFreepony 11 ปีที่แล้ว +1

    Lower case p is used to represent a negative log of the hydronium ion concentration. The pH scale is logarithmic.

  • @linguaphilly
    @linguaphilly 9 ปีที่แล้ว +4

    Haha that 'ohhhh'-moment at 6:28

  • @mollyhorse
    @mollyhorse 5 ปีที่แล้ว +1

    Love these videos! Love love love! Makes me laugh while I am learning...thanks!

  • @TheRok
    @TheRok 8 ปีที่แล้ว +54

    Can't believe there are no high voted comments on “All your base are belong to us!” at 3:09! What, no gamers here? =)

  • @jonmorris2232
    @jonmorris2232 11 ปีที่แล้ว

    Woah another channel with you...I NOW LOVE THIS CHANNEL

  • @PinkLove961
    @PinkLove961 10 ปีที่แล้ว +5

    pH and pOH stand for potency (p) of hyrdogen, (H) and potency (p) of hydroxide (OH), according to my chemistry teacher with a phD. (

  • @8ytan
    @8ytan 11 ปีที่แล้ว +1

    You neglected to mention, Hank, that kW is 1.0E-14 only at 25 degrees Celsius. At different temperatures, the value of kW is different and the pH of pure, neutral water also changes. I think (?) that this also affects the equation pH + pOH = 14 - I'm not 100% sure whether it does but I was always taught to be careful when finding pH from pOH using this method, instead we were taught to use a rearranged form of the kW equation.

  • @yousef.al-assaf
    @yousef.al-assaf 9 ปีที่แล้ว +14

    What?! lol. The numbers that you got from your example were 3.5 (pH) and 10.5 (pOH), which their sum is also 14. Late night video, eh!

    • @ingenuinegalaxies9299
      @ingenuinegalaxies9299 8 ปีที่แล้ว +3

      +Yousef Al-A'ssaf Did you watch the whole video? There is a reason for this. It is why we define a neutral ph 7.

  • @cutescience2109
    @cutescience2109 11 ปีที่แล้ว +1

    Delightful explanation of something we hear about all the time. I love that you start out by telling us that you are not "that into personal grooming!" Cute!

  • @allypeccia7699
    @allypeccia7699 8 ปีที่แล้ว +6

    Doesn't the water dissociation constant change with respect to temperature?

  • @Syntaxxed
    @Syntaxxed 2 ปีที่แล้ว +1

    'so now that you're terrified" exactly my reaction when my teacher introduced pH and pOH without explaining us logarithms lol

  • @user-em4rk4qo1f
    @user-em4rk4qo1f 8 ปีที่แล้ว +29

    I have to watch these at 0,5 speed in order to understand them properly

    • @EmmyKhan
      @EmmyKhan 8 ปีที่แล้ว

      Ah good idea

    • @noahwhetstone3525
      @noahwhetstone3525 8 ปีที่แล้ว +8

      this may sound crazy but try listening at 2speed. it forces you to really pay attention if you want to understand what is going on and you (might) learn it better.

    • @sherazkhan2802
      @sherazkhan2802 8 ปีที่แล้ว

      Ihate Mr. Wires How can I slow down the speed on a smartphone ?

    • @_ashyou
      @_ashyou 8 ปีที่แล้ว +2

      Sheraz Khan No you can't

    • @Benny_Blue
      @Benny_Blue 7 ปีที่แล้ว +2

      I watch them at 1.25 speed, so I can study more quickly.

  • @Qermaq
    @Qermaq 11 ปีที่แล้ว

    I liked the cartoons in this one, especially Katherine pushing you around in the shopping cart. Do you two do that often? That looks like fun.

  • @rex17ly62
    @rex17ly62 4 ปีที่แล้ว +3

    A common misconception is that a pH of 7 means a solution is neutral. This is just wrong, what makes a solution neutral is whether [H3O+] = [OH-].
    For example, Kc of water at a temperature of 25 degrees is 10^-14, in which case [H3O+] would be 10^-7 and the pH would be 7.
    But in a temperature of 50 degrees Kc increases to 5.476x10^-14, and [H3O+] would be ~6.63.
    However, since [H3O+] = [OH-], it doesn't matter it is neutral.

  • @mikeazevedo1613
    @mikeazevedo1613 10 ปีที่แล้ว +1

    Well, I can help you with one thing. Although I saw one reference to pH standing for "Potential Hydrogen", what I was taught long ago makes a lot more sense. That it stands for Particles of Hydrogen, which is reasonable given that it's particles of the Hydrogen atom that are causing the pH to change.

  • @zacharyivanhawkins251
    @zacharyivanhawkins251 11 ปีที่แล้ว +3

    LOLOL I've never laughed more from watching these videos 8:06

  • @Dixavd
    @Dixavd 11 ปีที่แล้ว +1

    They always add up to 14. That's really clever. I'm honestly impressed with the mathematics there (it's almost as if a mathematician derived it).

  • @LuisAntonio-xp4ep
    @LuisAntonio-xp4ep 9 ปีที่แล้ว +3

    Pls guys, CrashCourse Physics! plsssss!

  • @Latnii
    @Latnii 11 ปีที่แล้ว +1

    Thank you for this! I was in desperate need to understand pH and OH junk. Just in time as always, Hank!

  • @Rzkytron
    @Rzkytron 10 ปีที่แล้ว +33

    Emmmm... Crash course math & physics plox :/ ?

    • @leoneuler1147
      @leoneuler1147 9 ปีที่แล้ว +4

      PatrickJMT is an amazing math tutorial channel!

    • @FireVortex720
      @FireVortex720 9 ปีที่แล้ว +5

      When I dance you give free stuff plox!

    • @platinumbridge
      @platinumbridge 9 ปีที่แล้ว +1

      FireVortex720 that is some oldschool stuff

  • @kugelblitz7832
    @kugelblitz7832 11 ปีที่แล้ว

    These videos and Paul Anderson's videos on the Bozeman Science channel both compliment each other really well.

  • @BrixoRamas
    @BrixoRamas 5 ปีที่แล้ว +5

    Hey did you know? Nemo is Latin for nobody. So Finding Nemo is........ Finding nobody

  • @world-suppliers
    @world-suppliers 8 ปีที่แล้ว +1

    this help mr alot with understanding saponification , god bless you