Electrochemistry: Crash Course Chemistry #36

Рет қаралды 2,204,162

Күн бұрын

Chemistry raised to the power of AWESOME! That's what Hank is talking about today with Electrochemistry. Contained within, Hank discusses electrochemical reactions, half-reactions, how batteries work, galvanic cells, voltage, standard reduction potential, cell potential, electrolysis, electroplating, and the things that go into making it possible for you to watch this episode of Crash Course Chemistry!
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
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Table of Contents
Electro-Chemical Reactions 0:13
Half Reactions 1:42
How Batteries Work 1:47
Galvanic Cells 3:18
Calculating Voltage 4:12
Standard Reduction Potential 4:42
Standard Cell Potential 6:03
Electrolysis 7:24
Electroplating 7:02
--
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Пікірлер: 884

@crashcourse 4 жыл бұрын

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

@quantuminfinity4260 4 жыл бұрын

Cool!

@sudeepjoseph69 4 жыл бұрын

@doctorwhocolour 8 жыл бұрын

Is this designed for people who have tests in the morning?

@mistree0007 8 жыл бұрын

+ThisAccountIsNeverUsed that gave me chills :'( in 4 days is my test

@kylecolwell8407 7 жыл бұрын

actually watching this morning of

@remleek8676 7 жыл бұрын

Ryan Casey me right now

@aliciakacharia5140 7 жыл бұрын

Next period haha

@FlamingFox12 7 жыл бұрын

half an hour here

@convict3 Жыл бұрын

I failed my exam... but i wouldn't have been able to say I tried my best without you!

@superficial1557 8 жыл бұрын

Hank saving me from year 12 chemistry >.>

@chettymaanya9398 8 жыл бұрын

Ikr.

@MythicGirl2210 6 жыл бұрын

Imagine college 😱

@abishekraju4521 6 жыл бұрын

i am. And i bet he is and so are you

@10bit25 6 жыл бұрын

I have chemistry and physics-electrochemistry and physics all apart.. lel PEC is the least thrilling by far lol. Chem and phys are fun lel

@humairafarha3340 5 жыл бұрын

Were you REALLY saved?

@javianbrown8627 7 жыл бұрын

I wish teachers could animate real life like this. it would make things so much easier

@AdityaBytha 7 жыл бұрын

Exactly!

@humairafarha3340 5 жыл бұрын

The point he says "if you were listening...." I break down. Was I really listening?

@CptProtonicus 10 жыл бұрын

Hi Hank! At 2:10 the 4 subscript is a typo on the Mn for the left side of the reaction; there should be no subscript. ThePlasticModeler pointed this out a month ago, but there's no annotation yet so I'll reiterate it. I love that you guys go back and correct mistakes with annotations; it gives these videos a peer review and correction process arguably superior to scientific journals!

@aryanshetty6536 8 жыл бұрын

Hank green!! The best Chemistry teacher ever. I had completely lost interest in chemistry...... But then , here comes Hank Green in crash course chemistry and TADA i love Chemistry again. All thanks to the great Hank Green. I love CrashCourse Chemistry and Vlogbrothers Hank is just too cool!!.

@jesseinfinite 9 жыл бұрын

I'd have prefered more formulae in the crash course... But yes he speaks at a perfect pace.

@SanjayGupta-hx9ri 9 жыл бұрын

I love crash course! If only there were a CRASH COURSE PHYSICS!

@FROPDESAI 9 жыл бұрын

Sanjay Gupta WHY DON'T THEY DO THIS?! CrashCourse , PHYSICS MIGHT BE THE MOST DEMANDED SERIES! Please, do this.

@FROPDESAI 9 жыл бұрын

John Doe Thank you. Also, your name matches the default name of the character in games by Kairosoft.

@FROPDESAI 9 жыл бұрын

***** Thank you.

@skyloftian8241 9 жыл бұрын

Sanjay Gupta Crash Course Physics is a goal on their patreon www.patreon.com/crashcourse

@dbzaddict444 8 жыл бұрын

+Tanishq Desai its just a typical no-identity name hahahahah although Kairosoft games are good fun.

@chinecobisag5522 4 жыл бұрын

I love how he genuinely laughs at his stupidity at 3:03🤣

@blue.nostalgia 9 жыл бұрын

that moment when you don't pay attention in class and came here hoping that maybe you could digest everything in minutes... yeah i'm good, just gon get some tissues and start creating excuses for my failures later

@maryamkhan7027 5 жыл бұрын

People: he talks too fast! Me: watches in 1.5×

@Durfit 8 жыл бұрын

These videos are beyond helpful. I really cannot thank you enough for them.

@patriciocastillo2772 6 жыл бұрын

The quality of the video is outstanding!! Everything is summaries and present in a clear and short way.

@bayleaf4003 10 жыл бұрын

This show really helps in my AP Chemistry class!!! Thank you to all who make these shows they help more than you know!!!!

@SuperPrettyCOLORS 10 жыл бұрын

had to drop AP chem. I didn't watch enough of these videos.

@emt3873 9 жыл бұрын

Crash course is so great - saved my test scores on many occasions! It would be so good if you could do esterification or chemical monitoring - like the Haber process and water quality management, AAS etc! Keep up the amazing work, guys!

@lolscience1979 5 жыл бұрын

I love you, it is so relaxing to watch when you explain stuff!!!

@TheBlackestKey 10 жыл бұрын

I've watched a lot of crash course, and this is the first time that I need it to actually learn the concepts from class. AWESOME video I must say, very fast but I'll just have to pause it and take notes. Thank you very much Hank and the rest of the Crash Course staff.

@mocool05 10 жыл бұрын

Awesome. Love the Xhibit animation! Epicness.

@berrywarmer11 9 жыл бұрын

This is the Chemistry that your teacher wants to teach but can't afford to due to having to adhere to a curriculum. My own class is mostly process, math and rote-learning based, using this "Crash Course" as a way to get a solid CONCEPT based understanding. Chemistry is often very boring material if you look at it in your textbook, but Crash Course makes it come alive. The effort they put in is clear, and the devotion they have to the subject is real. Don't complain about them for not delving into equations enough: there is too much boring material already out there if you wanted it; read your textbook if you want problems and formulae.

@MattisProbably 10 жыл бұрын

00:42 and onwards was the most amazing and adorable thing I have ever seen on KZfaq.

@nerdynadine5892 8 жыл бұрын

I have a first year chem exam tomorrow and this is so great! Awesome review tool!

@TheDeedeenana 7 жыл бұрын

At 4:00 everything just clicked and there I was screaming because I felt like I finally understood all the knowledge in the universe. Thank you.

@alexk7138 4 жыл бұрын

These videos are timeless, and will be forever helpful to struggling ap chem students like me

@FreeSkillsStyle 6 жыл бұрын

What a great way to unite art and sciences, you guys are awesome

@rahulchakraborty1779 7 жыл бұрын

dude u make chemistry soooo interesting

@RobCardIV 10 жыл бұрын

yea !! the review notes at the end were perfect ! i could stop at every note and think back about what the subject was.

@mitalipatil8068 8 жыл бұрын

Love love love itt....around 30 pages of my textbook in 9 minutes :3

@purplenadz96 10 жыл бұрын

Hank! Love the Crash Course Chemistry series! Please do one for physics it'd be really interesting and I think many people will watch :)

@singerboxsasya3236 4 жыл бұрын

lovely representation sir !! i like the way you make the topic simple ,thanks for posting these videos.

@Turqoise365 10 жыл бұрын

I have a test on this on Monday... VIDEO WAS UPLOADED JUST IN TIME Thank you this was so helpful! not to mention eye opening!

@jarehelt 10 жыл бұрын

crash course physics hank!! pleeaassee!

@kayleehyson136 9 жыл бұрын

At least Hank actually takes the time to teach. AP Chemistry would be impossible for me without him!

@hallmorales 10 жыл бұрын

According to my professor and my college chem book, the outer layer in alkaline batteries is actually zinc, while the inner layer is a paste of KOH with manganese oxide.

@jeslinephoon4887 6 жыл бұрын

speaking at a perfect pace gotta say I luv this

@jazminsutcliff4106 7 жыл бұрын

Wow... lovely! I take electrochemistry this semester and I wanted to see how it is. This condenses pretty much everything xD

@emilyellisemilyellis Жыл бұрын

hank's getting me through senior chem in 2023 xD i missed most of my classes on redox reactions and galvanic cells and now i'm doing a whole experiment on galvanic cells because my teacher said that titration's too difficult, kinda forgot that i'd have to study all the theory before i can even start

@user-gk9me4pu5i 9 жыл бұрын

THANK YOU HANK you absolute life saver! :) I have a redox test tomorrow, and I've been so busy with other work, I have had to squash all my revision into one afternoon! This is really great and pretty much summarised the entire IB textbook chapter up in under 10 mins! (the chapter itself took me about an hour and a half to go through) Although I do have 1 question: how are you supposed to know what is produced at each electrode? e.g. solid metal or chlorine gas or hydrogen etc. How can you tell from an equation if a gas is produced?

@thatplane3865 Жыл бұрын

Feels like a rite of passage to be reviewing this morning of AP

@kleb3510 10 жыл бұрын

thanks, explanation of cells was really good. Often people cant explain it properly so I have never fully understood it until now. :)

@frances277 Жыл бұрын

Wow this just summarized everything i’ve been trying to understand the past 2 days😭

@irawinniewijaya2647 7 жыл бұрын

I have chem quiz tomorrow and i'm watching this instead of studying my note and books lol

@ChuuliviaHye 8 жыл бұрын

Last unit test for my ap chemistry class yesssss i need this class to be over omfg

@ruchi4965 8 жыл бұрын

Same for me! Out last test is electrochem tomorrow

@qtentertainment3845 8 жыл бұрын

+Sapphire Kawashima Saaame

@jacobroberts8931 8 жыл бұрын

fml let this class end I have 4 more weeks

@BowlOfCuriosity 8 жыл бұрын

is it weird that theres a love and hate relationship for the feel of the class ._. MAY WE SURVIVE MAY 2 #letthecramminggamebegin

@ChuuliviaHye 8 жыл бұрын

BowlOfCuriosity im so stressed for ap tests omggggggggg 5 tests q.q

@hassandaniyal5540 8 жыл бұрын

I had to give a test to enter the new school because of your videos i was able to successfuly pass the entry test. Thanks CC

@mmpm93 7 жыл бұрын

Thank you so much!!! I had a hard time understanding this

@hab33b0 5 жыл бұрын

Thank you so much crash course! ❤️

@tpstrat14 5 жыл бұрын

Being a space science junky, the “electron vacuum” bit was worth its weight in gold in my attempt to understand this.

@ogreunderbridge5204 5 жыл бұрын

Thanks. Excellent !But it would even be nicer if I could find a playlist on the whole serie :)

@SuperSly1337 10 жыл бұрын

Excuse me, I have to pick up the blown off pieces of my head...

@haninnasirabdullah1462 10 жыл бұрын

I know right?!

@allegropiano1327 5 жыл бұрын

Hhahahhahhah

@katie.scarlett 10 жыл бұрын

this video came at perfect timing because this is what we're learning in APChem right now :)

@archishat4844 6 жыл бұрын

thank you smmm this is great thanks a lot!!

@samuelsalis3805 7 жыл бұрын

Yeah keep up the great work! Thanks a ton

@MrEarthboundKing 10 жыл бұрын

Wow, we're learning this in chemistry right now!

@bitmaxim 10 жыл бұрын

Great video, as always. Along with the table of contents and other useful links provided in the video description, the link to your suggested prerequisite video on Redox Reactions would be a nice addition (although it's easily found by going to your channel page).

@KaleidoscopeFay 9 жыл бұрын

i might actually pass my midterm now, thanks Hank

@youssefmosleh9547 Жыл бұрын

You did a great job explaining this and I understand all of this so thank you so much 😅😅😅❤❤

@stefanhagens671 5 жыл бұрын

so helpful thanks hank!

@LeylaIbrahimlichem 10 жыл бұрын

Really thanks guys

@haninnasirabdullah1462 10 жыл бұрын

Crash course makes me so happy.

@saadinhalf 5 жыл бұрын

0:41 the chaotic energy of the universe just increased a little more there

@romantheflash 10 жыл бұрын

Well that was extremely helpful, I think I know now some of the inner workings of my pacemaker. Cool. :)

@kaii-lb Жыл бұрын

9 years later and hank green still explains really well

@Manabender 9 жыл бұрын

0:42 Unbelievably giddy Hank is unbelievably giddy.

@kaybee1749 7 жыл бұрын

3:01 When you have an AP chem test tomorrow morning and you're staying up to cram.

@zarinawillows2347 4 жыл бұрын

Is it just me or Hank looks super excited today. ☺️☺️

@93alkaladi 8 жыл бұрын

Thumbs up for all the effort!

@laurahornback6983 9 жыл бұрын

This makes prepping for the MCAT a LOT easier.

@LKDbass 9 жыл бұрын

Great video!

@Therealiceyslime 10 жыл бұрын

Love your videos I hop this get up

@ssc396 4 жыл бұрын

School : Time for some EXAMS....😈 Crash course : Time to save some life

@cascer123 10 жыл бұрын

I could've used this yesterday while studying for the chemistry exam I had today

@tmm246 10 жыл бұрын

i am just bowing before my computer. i have a massive ap chem test tomorrow and oh my god thank you!!

@darkcoffeebean7299 6 жыл бұрын

Have my SAT 2 in chem in two days. Thank god for CrashCourse :)

@tanvimore6493 5 жыл бұрын

Happy teachers day Hank...You're like super awesome..!!

@minaf6311 6 жыл бұрын

YOU SAVED ME GOD BLESS U

@aslamvillan5417 4 жыл бұрын

4:04 salt bridge is used to maintain electrical nuetrality and to make the circuit is closed. Its not function as metal ion carriers.

@rjals 10 жыл бұрын

I love that you uploaded this while my AP chemistry class is taking electrochemistry, haha

@bhavinpatel4355 10 жыл бұрын

love the videos, but at 1:52 the equation has Mn4O2 instead if MnO2, But keep making the videos, i love me some chemistry

@abdullatif-gq6vw 10 жыл бұрын

love u man, thank u so much, u saved me today:)

@rhead7088 5 жыл бұрын

my chemistry exam is tomorrow and I didn't understand this concept till now lmao thank youuu

@VLcommodore1987 9 жыл бұрын

I have already forgotten nearly everything you have said lol. I think I better start from episode #1. great vid though!

@gizmobirdman 7 жыл бұрын

I applaud anyone who didn't have to consistently positive video to take in every sentence he said

@mosesvalentin1600 6 жыл бұрын

My school shows and teachers the galvanic cell differentally. They put the electrodes in the same cup of just one single electrolyte.

@alexapeters9786 9 жыл бұрын

Error in 1:53... Manganese(IV)oxide is MnO2 like shown in the half reactions, and not Mn4O2 like is shown in initial ecuation.

@JohnSmith-gl8qq 9 жыл бұрын

Alexa Peters Ayeee i was about to comment that. (And speaking of typos, *equation)

@PikachuTries 4 жыл бұрын

Was looking for this comment

@1713Fearless 9 жыл бұрын

I truly thank you for saving my academic life.

@xeztan 7 жыл бұрын

Lydia Hayward you're beautiful

@shefinmuhammad1130 6 жыл бұрын

@DripisDaIdiot 4 жыл бұрын

Why do everyone want to let her to like you guys...the more u guys say the less chance she likes you it’s just feels...............weird?

@MrCOPYPASTE 10 жыл бұрын

And yet you surpass the quality of your videos. Thanks for being awesome :)

@yvonnekavithe6247 4 жыл бұрын

when he licked the battery lmao made my day

@bravefire4103 4 жыл бұрын

I can't believe he really just licked that battery. Science is trully an art.

@weplayshit1849 6 жыл бұрын

hank speaks fast but in a pure understandable way

@ShwellSLC 4 жыл бұрын

best lessons ever

@master-azazel 7 жыл бұрын

awesome i like how you repeated it in short at the end

@aleksandarivanov8737 10 жыл бұрын

amazing video

@acoow 9 жыл бұрын

Maybe you can do a video explaining how using electrolysis to remove rust works?

@emilyheilbrunn1703 10 жыл бұрын

Can you do a crash course on nomenclature! It's the most difficult thing i've ever learned, and i'm not really grasping it, and your videos usually help. Please and thank you! :-)

@AlexHall97 10 жыл бұрын

Yay electrochemistry, have to make up test

@FallingPicturesProductions 10 жыл бұрын

Thanks. You talk kind of fast, but this was a nice way of re-confirming that I understood these concepts.

@StarPurplePurpleStar 8 жыл бұрын

In writing the Mn redox reaction (at 2:05) Mn (IV) oxide should be written as MnO2, not Mn4O2 as it's written now. Crash Course, do you do corrections? Sorry if I'm being picky, I love the videos!

@AdvaitSaravade 8 жыл бұрын

+LouisaStar you should be picky.

@dcxs5896 8 жыл бұрын

+LouisaStar Its a test u see

@greatwhitesufi 8 жыл бұрын

+LouisaStar Literally 3 seconds later they wrote it correctly, so no harm no foul.

@courtsily 8 жыл бұрын

+LouisaStar wouldn't it be written as M2O by that logic? Because there is twice as much Manganese as Oxide in M4O2

@courtsily 8 жыл бұрын

+Advait Saravade wouldn't it be written as M2O by that logic? Because there is twice as much Manganese as Oxide in M4O2

@vivianaromeror2297 9 жыл бұрын

In an electrolytic cell, the anode is positive while the cathode is negative. You might want to specify that since many people may become confused. In a Galvanic cell, the anode is negative and the cathode is positive.