'' i spent all my time on chemistry'' gang where you at

@amiie5069

7 ай бұрын

Real

@Victorque.

7 ай бұрын

Real

@elliot5950

7 ай бұрын

Real

@J6K3R

7 ай бұрын

Not relateable 😢

@shahmir5445

5 ай бұрын

Real

Good luck to all on chemistry tomorrow.

@Qarxyu

Ай бұрын

I’m cooked

@fyrazz7695

Ай бұрын

@@Qarxyu lol

nothing less than excellency! you've explained it in five minutes better than teachers did in 9 hours .

@Cognitoedu

3 жыл бұрын

Thanks Anastasia glad it helped!!

@divyavarghese6232

Жыл бұрын

It was standardised...and the visuals helped a lot....teachers can't demonstrate experiments as visuals unless u go to a lab and there teachers can only show you what is in the limits of the lab....she can't just heat something upto 2000 degrees in a school lab

@louisstanfield4872

Жыл бұрын

sadly you are too silly to understand simple chemistry and see all of the mistakes in this video you doughnut

@namijanega162

Жыл бұрын

Some teachers r good some are bad but i bet none have a whole lab filled with melting chamber thingys and electron microscopes and accurate electrolysis equipment.

@Jacobinks

Жыл бұрын

Roblox

Hi everyone - we've got two mistakes to own up to here! 1 - the formula for Aluminium Oxide (at 0:20), should be Al2O3, and *not* Al3O2. 2 - the battery should be drawn with the shorter lines (the negative terminals) on the left, and the longer lines (the positive terminals) on the right. Sorry about that

@shaziashah8645

4 жыл бұрын

do a face reveal lol

@CobaltMagmaStudios

3 жыл бұрын

you made a mistake....pigs are flying....am I dreaming?

@kirishima8897

3 жыл бұрын

at 3:44 there were three oxygen atoms, so whered the fourth one come from

@subaitasubaita3051

2 жыл бұрын

please pin your comment

@kaverimehta7848

2 жыл бұрын

As If I care. Your teaching is so cool that not even nobody will see the mistake 😎 (Inside joke…Percy Jackson Reference)

Sir i have huge respect for you, i just discovered your channel, and now you helped me clear out something my teacher couldn't in just 4 minutes, short and simple. Thanks you Sir.

Finally , someone who can teach me the stuff I actually need to know all combined into one short video that I don’t get bored of, leave breaks so I am able to think bout what has just been said AND have all these videos for free for biology physics and maths as well, I appreciate this so much! Keep up the amazing work because this is how students should be taught. Everyone is saying this but I have learnt more from watching your videos than I have listening to my teacher for almost the whole of year 10. From the bottom of my heart, thank you! 😊

@Cognitoedu

3 жыл бұрын

Ah thank you so much Madeleine, it's so lovely to receive comments like this. Really glad you're enjoying the videos and that you're finding them so helpful 🤩

chem paper 1 tommorow i might be cooked

@katieluxon6732

Ай бұрын

i know i am

There is only one difference between chemistry students, many miss out on cognito ;)

I hope both sides of your pillow are cold because you're a lifesaver

Thanks for saving my exam 🙏 Our teacher literally doesn’t explain anything at all and you explained it better in 6 minutes than he did in 4 classes

Amazing lecture man, you taught me more than my chem teacher as usual

@Jacobinks

Жыл бұрын

Chem ahh 😱

thanks so much for listing the tiers this is for! i’m higher and i’ve been worried i’m only revising foundation- thanks a lot for this x

I love this channel so much and I thank everyone involved in it

Thank you for this video. Helped me a lot

You are the best😭😭you have my respect. You are the best👏🏼👏🏼

Thank you, really helped.

I really love these videos. I do electrolysis on a very frequent basis - that's how I found these videos while browsing. However, I cannot wrap my head around putting that molten metal into a beaker. I think "crucible" is the word you're looking for sir! :)

Thank you!! This is gonna be in my test and I didnt understand it, I do now :))

Love this lots of help

If there is more than one lot of ions that go to an eletrode do the less reaction ions gets formed and the others displaced?

thank you it was really helpful

I am a chemistry teacher, and i noticed that your electrolysis diagram's battery is wrong. The positive side is connected to the cathode, and the negative side is connected to the anode. This will cause the current to not work, as it should be the other way around. My ninth grade students pointed this out, and I just wanted to point it out in case anyone needs the help. Overall, I really enjoyed your explanation, and this was a helpful video.

@thesausageman5388

5 ай бұрын

Ninth grade? If you’re American, why are your students watching UK-Based GCSE vids?

This helped me so much

do other metal ores also get mixed with cryolite or is another process required for that?

Thank you, I understand now.

Who’s watching this cause of online lesson

@snowflakearticice1642

3 жыл бұрын

Me

@omarabobasha1895

3 жыл бұрын

Bro they are literally useless this guy here is a savior (A LEGEND)

@mattbanks3517

3 жыл бұрын

I want to make pure iron from low quality iron ore.

@claraishungry501

3 жыл бұрын

me :'( online classes suck

can anyone explain how i can balance the overall equation

you have made me the king of electrolysis

Thx. Really helped. Keep the vids coming

@Cognitoedu

5 жыл бұрын

That’s great to hear - thanks Abdul :)

@AbdullahKhan15

3 жыл бұрын

@@Cognitoedu You mean 'Bob' right?

@user-ky5ev6sk1q

3 жыл бұрын

@@AbdullahKhan15 do u know him irl?

@bugbea

2 жыл бұрын

@@AbdullahKhan15 they changed their username as the comment was 2 years ago it might have been abdul!

@jaiden4775

2 жыл бұрын

@@bugbea these guys r so dumb 🤣🤣🤣🤣

Thank you so muchhh

Good work

on the diagram don't you have to draw thhe cell the other way around?

@benburdsall1170

Жыл бұрын

Yes he has, the cell with the short line is the negative and is therefore the cathode and not the anode as shown

Very good, thank you. Shouldn’t the battery be connected the other way, or the electrodes swapped? I say this because I think the electrons will be repelled towards the anode, and the positive ions repelled towards the anode?

@ollielax2671

5 жыл бұрын

Sorry I meant positive ions repelled towards the cathode

@Cognitoedu

5 жыл бұрын

Hi Ollie, Yes you're completely right! Sorry about that - we've drawn them the wrong way around! We've pinned a comment at the top to address this.

@ollielax2671

5 жыл бұрын

Hi thanks for the reply. No problem at all.

@rachelsteve5581

5 жыл бұрын

I didn't understand this.

@bbruqiaazami9199

4 жыл бұрын

@@rachelsteve5581 think of it like this: the conventional flow of current is positive to negative and the electrons are transferred from the anode ( the positive terminal ) to the cathode, right? now the positive side of the battery is drawn towards the cathode rather then the anode and the current can't flow that way. therefore the cathode ( the negative terminal ) will repel the electrons cuz like charges repel... I really hope this makes sense and helps you! :)

Is this for higher or foundation?

3:24 How do you know these atoms are positive or negative? does it show it on the periodic table?

@lewishancock2808

3 жыл бұрын

@Ashika UPADHYAY Thank you so much :)

@Alan-tv3co

Ай бұрын

@@lewishancock2808i can’t see the comment what was the answer

@get.sent1

Ай бұрын

@@Alan-tv3co yh what was the answer

I am pretty sure in the power source the positive terminal goes to anode (negative) and negative terminal goes to cathode (positive). Anode is where oxidation happens and has negative potential. Cothode is where reduction happens and has a positive potential

@novaastronomia8720

7 ай бұрын

Well, that is in the case of galvanic cells. It's the opposite in the case of electrolysis. To know more you can look it up.

You guys can also watch Tyler Dewitt's videos on Electrolysis,Electroplating,Galvanic cell.But some topics are left out there like Electrolysis of Aluminum Oxide and Electrolysis of Aqueous Solutions.For that you can watch free science lessons videos.

Your formula for aluminium oxide at the start of the video is incorrect.

@Cognitoedu

4 жыл бұрын

Cheers Chris just flagged it in the pinned comment 🤙

At 5:44 shouldnt the 4Al be solid?

@camxvinga

Ай бұрын

when it cools it will be solid it has been kept molten for the reaction to work but will cool after

Why do the oxygen ions only escape into the air when their electrons are removed and not earlier? Is the strength of attraction of the anode greater than the upwards force?

@minaalwaseem3976

3 ай бұрын

because its in ion form in the solution so when it removes electrons to the anode it becomes O2 gas so can float off

Mashallah ❤❤

I am so stupid!!!!Oh god save my chemistry!!!

Uh... Is the cathode and anode not the wrong way around in regards to the battery?

@IlTheOnelI

4 ай бұрын

it is

shouldnt he have used the shorter lines on the left?

When the oxygen reacts with the carbon anode, does it not react with the carbon to form carbon dioxide?

@aliabdullah6753

3 жыл бұрын

1.There is nothing called a carbon anode 2.Carbon dioxide is formed in the reduction of the carbon method 3.Carbon dioxide cannot be formed in the electrolysis method I MIGHT BE WRONG

@arishahussain8130

3 жыл бұрын

Yeah the carbon electrode is also known as inert electrode The O2 gets dischrged at the carbon anode and due to hight emperature reacts with carbon in the the carbon anode to form co2 gas

@indian-tech-support

3 жыл бұрын

@@aliabdullah6753 carbon reacts with oxygen to create co2 and that's why you have to replace the anode

@grakoe

2 жыл бұрын

@@indian-tech-support yeah you’re right

How come the product gave aluminium as liquid state? Can u elaborate pls.

@theauburnfirefox8767

4 жыл бұрын

Akei bazli I’m assuming it is because it was molten liquid to begin with though I may be wrong

@tayyabjanjua3255

3 жыл бұрын

the solid liquid was heated and therefore state changed to liquid

Wait..can someone tell me why aluminium is liquid at the end? Bcs i thought it was gonna be metal?

@kiara7827

4 күн бұрын

In solid the ions can't move

@user-fm7vw4mx6i

3 күн бұрын

Oh okay thanks

5:37 it was Al2O3 then it turned to Al and O2…what happened to the other O if it was O3?? I feel so dumb right now istg

Sir your subscribers and views are too less then you deserve ❣️

@Cognitoedu

2 жыл бұрын

Ah thank you so much Asad 😊

@asadiqbal1882

2 жыл бұрын

@@Cognitoedu keep growing more and more☺️

i dont understand why the half equation isnt the 2Al+^3+ 6e- -> 3al why is it just Al not 2al

@grakoe

2 жыл бұрын

The reason why the Oxygen ion has a 2 is because oxygen is diatomic which means that having one ion cannot make a diatomic oxygen molecule, so you add a 2 on the left. For aluminium you only have one ion and one atom so there’s no need for balancing it with adding a coefficient

0:31 I thought Aluminum Oxide was Al2O3?

"oxygen is being oxidised" very interesting

Wait… if you melted the ionic compound wouldn’t its heat melt the electrodes?

@Big_Topic

9 ай бұрын

Not if the electrodes had an even higher melting point

@NoOne-yv2ei

9 ай бұрын

@@Big_Topic what if it doesn’t? People usually use graphite or platinum, but their melting points, while higher, are not the highest.

ily

Who’s here NOT because of an online lesson?....

@unxtraordinary

10 ай бұрын

Practice chemistry paper 1 test tomorrow lmao :D

@saltedbarofbutter

3 ай бұрын

I am just here cuz I like to watch this man's video. Besides, this knowledge is definitely going to help on any electrolysis questions.

0:23 aluminium oxide is Al2O3 not Al3O2

❤❤❤❤❤❤❤❤❤❤❤❤❤

aa

Why did we use carbon for the electrodes

@ihsan2837

2 жыл бұрын

Good conductor of electricity

@xiiaowai7472

2 жыл бұрын

And also cheap Plus it won't involves in electrolysis process

i still dont get it

@ryze5436

2 жыл бұрын

Maybe try free science lessons

If u hv trouble remembering the Neumonic Remember " AN OIL RIG CAT "

Even though `I am studying at CIE Cambridge IGCSE... These videos are helpful

I think your cell symbol is another way around

I'll get an A from all my sciences and let you know. Right now, I am C or B level

@AB-lz5io

2 жыл бұрын

1 summer break later and here I am again

@ihsan2837

2 жыл бұрын

@@AB-lz5io so what’d u get

@AB-lz5io

2 жыл бұрын

@@ihsan2837 A

@ihsan2837

2 жыл бұрын

@@AB-lz5io Nice

@AB-lz5io

2 жыл бұрын

@@ihsan2837 thx

oil rig it is

Rizz icl

100 comments :D

Bruh the equation for aluminum oxide i al2o3 not al3o2

Man I wish i did GCSE..8.4.4 is just UGLY

i think you made a mistake at 5:08 as reduction is loss of oxygen and oxidation is gain of oxygen but you said it the other way round

@omar.t975

3 жыл бұрын

nope, there's a little way to remember which is which, its called OILRIG Oxidation Is Loss of electrons Reduction Is Gain of electrons Hope this helps :)

@hamzaibrahim8457

3 жыл бұрын

@@omar.t975 but in the last video he said the opposite for extraction of metals

@hamzaibrahim8457

3 жыл бұрын

really confused here

@omar.t975

3 жыл бұрын

@@hamzaibrahim8457 so theres 2 types of reduction and oxidation, If you say sodium was oxidised, it means you added oxygen to sodium If sodium oxide was reduced, you took away the oxygen from it so now it's just sodium OILRIG is talking in terms of electrons So sodium is oxidised as it loses electrons to become positive Oxygen gains them electrons from sodium to become reduced I just used sodium as an example by the way.

amogn us

This shit is so confusing

Its Al2o3 not al3o2