Introduction to electrolysis | Redox reactions and electrochemistry | Chemistry | Khan Academy

[@vinhngo9766]

God's gift to unfortunate students with terrible teachers such as myself. Long live Khan Academy

[@tehyonglip9203]

concise, simple and beautiful

[@biancabeekhuizen131]

thank you science god this helped insanely.

[@Andrea-oq8ch]

taking my bachelors degree online, and videos like this help me a lot with my studies, thank you very much!!!!

[@lifefan1]

It is mind blowing that this education is FREE 🤯

[@AK-di4rv]

I honestly love this guy!!!! His ability to teach is impeccable.

[@sheevpalps3846]

I’ve met him he’s such a great teacher

[@asianlaxer]

Great mnemonic that has helped me all these years: A FAT CAT GERty ate AN ANOREXIC OX LEO, the cathode gets fatter via metal deposition, it is reduced (gain of electrons is reduction), the anode gets skinnier and loss of electrons is oxidation! Hope that helps!

[@tommysmyth1210]

Also: FAT CAT -> From Anode To CAThode (path of electrons)

[@iluhyuhswag]

THIS IS THE BEST ELECTROCHEMISTRY VIDEO IVE EVER WATCHED!!!! i was confused and ignored electrochemistry for so long. I thank God for this video!! ❤

[@youssefahmed8110]

4:27 you said that the cathode is negative because electrones are forced into it. Then why in the gelvanic cell the cathode is positive although electrones flow to it?

[@yousefsamiromar7510]

Another way to know oxidation and reduction is OIL:oxidation is loss RIG:reduction is gain OIL RIG

[@shahdabdelaliem6245]

Yeah that’s how I took it in school too!

[@abhigyansrivastava4247]

you solved my 4 hour long doubt in just 2 minutes which makes me mad on youtube for not suggesting this video😀

[@affriashroff8112]

Why is the Zn electrode in the left negative anode, shouldn't it be a positive anode? Because Zn is loosing it's electrons hence net charge being positive? 🤔

[@StagnantMizu]

I think that due to convetional electric flow theory it should be changed honestly and - should be considered + in the future

[@framerate1494]

One of your best videos. My teacher never taught this in a way I understood so this clarified all my questions! Thanks

[@kundakambaki460]

Finally understanding this 4 hours before my test 😢....thank you

[@seabird3896]

I feel like my Chem grade would have been so much better if my teacher just played this instead((((::

[@paolamiao3580]

LIKE YOO, I FINALLY UNDERSTOOD HOW THIS WORKS, IN LIKE 6 MINUTES, WHICH IS ABSOLUTELY INSANEE 😭

[@fruitcupsandorangejuice]

THANK YOU UR SO GOOD AT EXPLAINING THIS MAKES SO MUCH SENSE

[@cuccimonster9728]

Be careful in wording as electrons don’t move to create current, charge moves to create current and specifically positive charge. Don’t want to confuse which way current is going and which way electrons are flowing.

[@尘世之际]

It makes much more sense now!!

[@learningrockers2670]

Long live kha academy

[@H750S]

So if I was using electrolysis to remove rust from something. Would the rusted part be connected the the negative or positive of a battery charger? Seems like it would be to the positive side so it looses electrons which should remove the rust? Or do I have it backwards?

[@supravaroy9971]

Excellent video !!!!💝

[@StagnantMizu]

I find the fact that reduction makes more sense for me on the electrode that loses electrons. I keep mixing these up.

[@StagnantMizu]

and I dont quite understand why positive is gaining electrons electron flow is from - to + so shouldnt we just use that as reference for - and + poles?

[@dimkacracker]

so this is why we attach + jumper cable to + side of the battery and - jumper cable to the negative part of the battery.

[@sandervdcp3513]

This is a masterpiece

[@SharkRockstar]

Thanks bro exam in an hour

[@IbnKiran]

where are you now in life?

[@SharkRockstar]

@@IbnKiran haha hey doing an undergraduate in advertising, dropped chemistry like smth after high school! Wbu?

[@RonZhang]

So thanks a bunch for breaking the confusion with charges of anodes and electrodes!

[@gelilaasefa2773]

Thank you!!!

[@H750S]

Thanks for the explanation on this, very well done. However I do still struggle to understand why wouldn’t the Zn cathode not loose electrons back through the bridge between the two containers back to the Cu anode and return to the battery since current/electrons always return back to the source? Seems as though they would both gain and loose electrons at the same rate/time and nothing should change...

[@AnikaSharma-fx2sm]

Well zinc is higher up the reactivity series than copper and is more reactive so there is a greater ease of zinc to lose electrons over copper

[@Ashicakez3]

Thank you! :)

[@israrkarim65]

So well explained

[@missmak559]

Awesome video

[@youssefahmed8110]

1:57 the electrolytic cell

[@arashsingh5337]

Thank you very much!!!!!!!

[@debaleenadattagupta1181]

can you please make a video on electrolysis os solutions too?

[@MonkeyDLuffy-xr4fl]

Thanks!

[@cassielandL]

OMG I NEED YOU

[@orieva3540]

so great

[@sabashahin_]

Please make a video on product of electrolysis. That topic is very confusing.

[@emarket7]

This helped so much thank you

[@Andy-km1xp]

Erik Mercado lol you profile pic bro

[@TravelWithTea8]

Great job :)

[@djice8286]

could you explain the use of the tube please?

[@AkiSharipov-Multiaki]

Why different metals emit different amount of hydrogen? For example for the same time and energy Graphite creates more hydrogen than aluminum, zinc, or other metals. Does that depend on the energy spent for oxidation? If the energy is the reason, can you point me to any material that calculates the energy spent to create different oxides. Thanks in advance.

[@Andy-km1xp]

Aki Sharipov I’m not sure but could this have to do with hydrogen being a poly atomic atom ?

[@kausikkar7805]

Superb!

[@jannatoitri6692]

Red cat and anox very easy to remember ...

[@garlic98]

why would cathode be positive for galvanic cells if it's gaining electrons?

[@roya1e]

What would happen in the electrolyric cell, if the battery was reversed? Would the electrons then flow to the right into the CuSO4 solution? And would it be performing any work?

[@spicydiarrhea5662]

lol was about to ask the same. What would happen if we add a reversed battery to the voltaic cell? I think it would just greatly speed up the process of spontaneous reaction. Or perhaps the battery would be charged? Idk

[@ta3d000]

HELP: do electrolytic cells have a salt bridge like galvanic cells?

[@lester8940]

yes

[@debaleenadattagupta1181]

i have a question. can anyone tell me, inspite of sodium being more reactive then hydrogen, why will hydrogen ion discharge at the cathode instead of sodium ion when a sodium chloride solution is electrolyzed? similarly, why will chloride ions discharge at the anode and not hydroxide?

[@metatutor4817]

+Misa Amane you might have mixed up reactivity of atoms vs stability of the ions. The Na+ ion is more stable (less "reactive") than H+ ion and so is less likely to be discharged.

[@debaleenadattagupta1181]

Meta Tutor oh yes!!! thanks a lot!!

[@kind717]

I understand the direction of the electron flow is from anode to cathode for each cells but is the direction of the current different for each?

[@ghulammustafanarejo9261]

Can somebody tell me which case is battery charging and discharging ?

[@karthikprabhu3173]

How about OAA and RCC easy to remember

[@TienPham-rl5ou]

cool vid

[@basitmalik6504]

what's the relationship between mass and volume of a gas at S.T.P?

[@zobesmith6811]

1 mole of a gas has volume 22.4 liters at stp. the mass of 1 mole depends on the gas. the number of moles and the volume are directly proportional to each other in the ratio 1:22.4 (moles:volume)

[@basitmalik6504]

so mass and volume have no relationship with each other. right?

[@reecejones4658]

AP Chem 2019 gang rise up

[@Whstdueh]

Reece Jones test is in 1 hour

[@abhilasha9608]

🙌

[@donaldscott5949]

Why is the negative terminal of the battery on the left?

[@Andy-km1xp]

Donald Scott because the zinc is on the left. Which is the one that’s loosing electrons (oxidation) and that cathode is the one snatching it’s electrons

[@ryanauton7026]

alright alright alright

[@carbo203]

❤

[@Exe.Illuminati]

จารน้ำเพชรส่งมาคับ

[@rubehuyghe302]

🙏🙏🙏

[@iluhyuhswag]

AN OX RED CAT 😉

[@anonymous-pb2fc]

No offense but this video is not at all khan academy standard it's confusing. .....especially as I have not done galvanic cells.....

[@matthewbarnett3540]

+Yusra Sohail that is strange because i thought this was the most easiest video of this topic to understand. it makes difficult topic simple

[@anonymous-pb2fc]

+Matthew Barnett nah maybe for u but for me it was honestly confusing .....like this just washed away all the concepts u ever formed but thankfully I have a good teacher this term so. ....I'm good

[@andremoezzi9519]

Well if ya had a good teacher why are you googling different cells.. just for fun?(;

[@emmemm9786]

thank you!!!