Hi everyone, please be aware the lines on the battery are drawn the wrong way around. The shorter line should be on the left (connected to the cathode), and the longer line should be on the right (connected to the anode). Apologies for the mistake :)

@naveensundar4765

4 жыл бұрын

np

@danaf2537

4 жыл бұрын

Hello. i doubt you will see this but i have a question about the preferential discharge of ions. At school we were taught about electrolysis of both concentrated and dilute aqueous solutions and only in the concentrated aqueous solution, in the case of NaCl, the chloride ion is discharged. In the dilute form, we were taught that the OH minus ion was discharged but here you say the Chloride ion is discharged. So I guess you can see my confusion. Could you clear this up please?

@abrarmansur3666

3 жыл бұрын

@@danaf2537 It depends on whether the solution is aqueous or concentrated. If it is concentrated it will be chloride if it is aqueous it will be the OH- ion

@CobaltMagmaStudios

3 жыл бұрын

how could you possibly make a mistake? Is this a dream?

@lordofmysteries6436

3 жыл бұрын

no worries

i love this channel, how they explain is really understandable. i have just graduated from chemistry education and now i'm teaching in secondary. i always go to this channel before i teach my students so they can easily get the point of the things that i explain to. thank you so much. hopefully this channel can get a huge attention and always upload the video regularly especially in chemistry

@MysticShadowbrawlstars

2 ай бұрын

3 years later :3

@Irons1966

2 ай бұрын

2 hours later 😂 ​@@MysticShadowbrawlstars

This has been the hardest part of my chemestry so far.....Very confusing. Thanks for this video it made it much more easy to understand. Thanks.😉✅👍

@Cognitoedu

4 жыл бұрын

Ah thank you! So nice to hear you found this one useful! I found electrolysis super tricky at school so really pleased this could make it a bit more manageable for you 🥳

@awayoflife4002

4 жыл бұрын

@@Cognitoedu Thank you.👍

1 point to note. Halide ions aren't always discharged because if the solution is dilute ( more water than salt) than the hydroxide ions are discharged instead. But anyways great video explains details very well❤

@lefamofokeng8291

2 жыл бұрын

@daisy I have to know it as a Triple Science..I never knew the 'Halide' thing till today actually

@huzzi_cr754

Жыл бұрын

Thank you so much I was so confused when hydroxide got discharged in a past paper 😂

@_Guessy

Жыл бұрын

THANK YOU OMG I WAS SO CONFUSED ❤❤

@allcaps6181

10 ай бұрын

Wait so if it’s dilute then hydrogen and hydroxide is always discharged?

@rumaisashah3594

10 ай бұрын

@@allcaps6181 not hydrogen necessarily but hydroxide yes. Hydrogen depends on the type of cation.

I love your rich content and you present it in aesthetically with drawing and animations, this channel is a source for my last-minute revision for exams!

tmr is my chemistry paper 1 gcse revising last minute :')

@sheilabirling

2 ай бұрын

i’m with you!! good luck!

@Scary_Momo

Ай бұрын

did u do well?

@Bellxia

9 күн бұрын

How was it?

@sheilabirling

9 күн бұрын

@@Bellxia fine-ish! gosh i haven’t looked at a cognito video in a month 😭

@Bellxia

9 күн бұрын

@@sheilabirling that's amazing! Hope you succeed

I was unable to understand this concept from my text book. Your video made the concept crystal clear. Thank you so much!😀

Thank you so much!!! For me it was one of the confusing theories......Thank you for making it clear .

@Cognitoedu

4 жыл бұрын

You’re very very welcome! Really happy it could help you out! Good luck with all your work 🥂

Good luck for tomorrow guys

I have learnt more in 5 minutes that in 1 hour of learning my textbook. Great Job! 👍

@coolbus_4585

7 ай бұрын

your probably just a bit stupid icl

Ahh!!! Where Content meets Quality! Absolutely wonderful job the videos are so precise yet so Attractive and Informative. Keep the good work going

This guy needs to know his worth what an absolute king 👑

God bless you, sir. You just explained it way better than my teacher and textbook in just 6 mins!

I got confused when I read this topic but you made me master for this topic. Thanks alot

Love your vids they always make hard things easier to understand...thank you I understand Chemistry way better than before

omg, this helped me sooo much. I was really struggling before my final IB exams in November but I think I now understand this topic and can smash it!!

My biggest confusion regarding these questions have been solved. I was literally so worried😭. Sir, you beauty👏

Very helpful! That really cleared it up for me. Don't worry, everyone makes mistakes.

Thanks, this is better than my rapping teacher! He talks too fast I can't keep up but thanks to this channel I understand the whole subtopic for just 5 minutes

@Cognitoedu

5 жыл бұрын

Thanks for the lovely comment, really good to hear you're finding them useful!

Wow such an amazing lecture ...!! I understood this difficult topic in just 5 minutes....thankx 😊

Thank you so much I FINALLY understand how to do this! Keep up the good work 👍

OMG thankyouuuu so much Cognito... i was stuck with electrolysis for 2 days, unable to understand. In 15 mins everything was crystal clear... Will really help out on my exams!

It was awesome, keep making us understand in this way, thank you

1 point you missed is that halide is chosen if its concentrated but if its diluted halide then you would choose the hydroxide btw i love your videos a lot they are really nice and i can understand then really quickly

Having my chemistry exam today, this video helped me learn about electrolysis so much! Thank you so much Cognitoedu, I will never forget your work. I will update you with my grades!!!

Thank you, this video me passing the exam test. I am very glad!

Congrats on 200k!

THANK YOU! I struggled with this for so long but I understand now because of your videos!

@Cognitoedu

2 жыл бұрын

Ah great, glad we could help! 👍

OMG LIVE SAVER! I have an exam tomorrow on Electrochem and my prof made this topic 1000x more confusing. You explained it to me like I'm a 5 year old and I love it.

Thanks for this video but where does the 4 in the half equation for the hydroxide ion come from?

stop saying hes good at explaining i cant like all comments. honestly thanks man, preferential discharge is hella difficult. cheers for a thorough explanation x

was struggling on the reactivity series and stuff but this helped alot thanks!

Thank you so much! Would give you a big hug, May God bless you for blessing me❤

Thank you so much, I was having trouble with this topic!

thank you so much i couldn’t understand the lesson clearly from my teacher but your points made everything crystal clear for me !!! now its easier to study the lesson

@gloss1138

3 жыл бұрын

omg hi fellow army !!

Thanks ...... It really cleared up all the messed things

So another explanation why hydroxide ion discharges instead of sulphate ion is because sulphur in sulphate ion is already at its highest oxidation State so it can't be oxidized any further.... so in this case the only remaining candidate is hydroxide and it discharges at anion

Thank you I finally understand!

I DEFINITELY DID ENJOY THIS VIDEO THANK YOU KING U DESERVE THE WORLD

Imagine going to class and studying for a whole hour and still not understand, while watching this video with visuals and clear audio as well as animation helps one understand the entire part in less only 5 and half minutes. Thanks so much for your amazing videos!!

This was an amazing explanation, really appreciate your channel!

@Cognitoedu

2 жыл бұрын

Thank you Leia, glad you're finding the channel helpful 😊

You clarified and solved all my doubts and problems in just literally 5:42 minutes, I can't thank you enough!!!

@Cognitoedu

3 жыл бұрын

That's great to hear Tylor, glad we could help 😊

thanks a lot you are a saviour of my life

correct me if im wrong but i thought for the anion that is selectively discharged , wont the halide be discharged only of its concentrated?

a bit of a random question but why does oxygen not make carbon dioxide when reacted with the carbon electrode but instead stays as oxygen gas?

Question: why do copper accumulate around cathode, and not just fall to the bottom like other metals do?

Bruh I had to watch this for science, decent video Mr Ray thanks for recommending

For conc. dilute solutions halides wont get discharged rather oxygen would be discharged

best explanation ever , seriously abosolute legend!!!!!!🙏🏿💯

Why is it that the ion of the least reactive element will be discharged ?

@jamiejayasundera7785

3 жыл бұрын

Because it is below hydrogen in the reactivity series

@rebeccagoldbacher5881

3 жыл бұрын

The more reactive ions are happier to stay an ion than the less reactive

please how can i made ionized water (as like as kangen water) without water ionizer by using an oxygen tank and an hydrogen tank? is there a method for do this?

doing chem a level, forgot about this stuff, my teacher sent me this. nice video

It’s crazy how this made so much sense 👏 👏

@Cognitoedu

3 жыл бұрын

glad we could help 🙌

Thank you so much . It really was clearly .

God bless you !!! .... finally i understand !

This channel is very underrated

In the NaCl example, what happens to the Sodium and Hydroxide ions if the water stays present and when it evaporates?

In the last example shouldn't the solution be concentrated so that the chlorine ions discharge at the anode?

This really helped me thanks a lot

you always made things easier. Thanks!

@Cognitoedu

3 жыл бұрын

Glad you like them! 😊

Thank you for the information. But shouldn't the sides of the symbol of the dry cell be changed?

Thanks sir.......... 🙏 Doubts cleared :)

This really helps😍 thanks so much!

Spent hours trying to figure this out. First 20 seconds of this video, I understand now...

Thanks I understand this much better now so helpful But what does discharged mean

This really helped, thank you so much.

Why does the less reactive one get discharged on the cathode?

Thank you very much for this excellent lesson.

Thanks bro! 100 time better than school

thank you so much, electrolysis has never been easier

Now that I think about it, aren't we supposed to write the formula and the charge of the solution present after the electrolysis?

this is such a good explanation

2:02 isn’t carbon a non-metal, how does it end up in the cathode?

Thanks sir for clearing my doubt 👌👍👍👍👍👍😊

why is zinc produced at cathode instead of hydrogen in electrolysis of aqueous zinc sulfate

What will happen to the hydrogen when the copper is discharged? Will it remain in the electrolyte? Also this video was super helpful! Thankyou :)

@Cognitoedu

5 жыл бұрын

Hi Accio, it’ll stay in the electrolyte!

for the last example, why did chlorine get discharged? you said it was a halide but i cannot find chlorine on group 0 of the periodic table. could i please have some help?

@Cognitoedu

3 жыл бұрын

Heya, the halogens (which are called halides when they're ions) are the group 7 elements. Group 0 are the noble gases. Hope that helps :)

Thank you a lot sir!

Is this for conc aqueous or diluted

What is meant by concentrated aqueous?

i always hated electrochemistry because i didn't understand it but because of your videos i finally understand TYSM

2:52 if it dilute i will be hydroxide even if there is halide

Can Upload video with some more example with copper sulfate and more on

understanble and awesome video

Thank you verry much I am really grateful

Can u please explain the OH minus to form water and oxygen part ..i am having some confusion in that part...pleasee

So a H+ Ion will always form at the cathode, and an OH- Ion will form at the anode?

@Cognitoedu

5 жыл бұрын

Hi, not quite. In aqueous electrolysis the electrolyte will always contain H+ and OH- ions, but they will only be discharged in some cases. H+ ions will be discharged to hydrogen gas only if the metal ion in the solution is a more reactive metal like magnesium or sodium. OH- will be discharged only if there IS NOT a halide present. Hope that helps! It's explained from 1.10 onwards :)

Can someone explain why the less reactive metal undergoes reduction at the cathode

@lefamofokeng8291

2 жыл бұрын

It might be that because the metal has a lower tendency to react. it is more prone to 'detaching' itself from the electrolyte.

bro u r a legend TYSM :)

does anybody know what the equation would be for the last experiment

Is it always 4 hydroxide ions when there are no halide ions present or is that just the amount for this specific reaction?

@Cognitoedu

4 жыл бұрын

Hi, It will always be 4OH-, that's how it balances :)

@ammip8432

4 жыл бұрын

Okay thank you so much this was super helpful :)

@ethurrrnet

3 жыл бұрын

@@Cognitoedu why is it always *4H+* + *4e-* -> *2H2* for hydrogen’s half equation if hydrogen discharges? (And not *2H+* + *2e-* -> *2H2* )

it is a great explanation but confused why 4OH--->2H2o+02+4e }it comes up to no where

Oxygen is more electronegative than all the halogens apart from fluorine. So it makes sense that halides get discharged apart from fluorine which is the outlier. And you’ll find that in the exams and even on BBC bite size they just don’t include fluorine because of this!

Sir...why halogen are discharged at anode always when it is present????

@jomanaeldeek6993

3 жыл бұрын

Because it takes less energy to discharge the ion from the least reactive element., it is below hydrogen in the reactivity series , the more reactive ions are happier to stay an ion than the less reactive .

Just a question, how does the metals such as magnesium get discharged if it's always the hydrogen ions that get discharged? (remember seeing a question like this, forgot exactly what)

@s1r4t_

9 ай бұрын

use a molten electrolyte instead of an aqueous one so that the H and OH ions are not present for discharging.

how do you know its copper 2 + and not 3+ - sorry i am confused it's my first time

Loved this video but quick question: on the second example at the end in the electrolyte, there is Na+ and OH-, what happens from there as I thought the point of electrolysis was to get the compound down to its elements and in the electrolyte now, it is two elements ???

@vintxge_taetae

3 ай бұрын

Hi! Maybe im a bit late but basically, at the end NaOH is formed, while is an alkali. So, in the electrolyte 2 IONS are left, not elements. Elements left are 3: Na, O, H. Hope that helps :)

4:33 can u explain why hydroxide became h20 and 02 please fast

4:28 i'm having trouble understanding this equation, can someone explain?

2:50 my textbook said that if a halide isnt present, it is oxygen that will be discharged?

@duo_official

3 жыл бұрын

OH- ions from the water will be discharged and oxygen gas(and water) will be formed