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
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.
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
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! 😊
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 🤩
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.
Thank u so much!!!!! I usually don't comment but this explanation was wayy too good not to. I didn't quite get this topic at first when it was taken in my class but now I understand 💯
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?
@@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! :)
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! :)
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.
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
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
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?
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
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
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 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.
![เกิดใหม่ทั้งทีก็เป็นสไลม์ไปซะแล้ว ซีซั่น 3 - ตอนที่ 69 [ซับไทย]](http://i.ytimg.com/vi/QuodflInQT8/mqdefault.jpg)
'' i spent all my time on chemistry'' gang where you at
Real
Real
Real
Not relateable 😢
Real
nothing less than excellency! you've explained it in five minutes better than teachers did in 9 hours .
Thanks Anastasia glad it helped!!
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
sadly you are too silly to understand simple chemistry and see all of the mistakes in this video you doughnut
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.
Roblox
Good luck to all on chemistry tomorrow.
I’m cooked
@@Qarxyu lol
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
do a face reveal lol
you made a mistake....pigs are flying....am I dreaming?
at 3:44 there were three oxygen atoms, so whered the fourth one come from
please pin your comment
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! 😊
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 🤩
I hope both sides of your pillow are cold because you're a lifesaver
chem paper 1 tommorow i might be cooked
i know i am
There is only one difference between chemistry students, many miss out on cognito ;)
Amazing lecture man, you taught me more than my chem teacher as usual
Chem ahh
😱
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.
Ninth grade? If you’re American, why are your students watching UK-Based GCSE vids?
Thank you for pointing it out! I was so confused
Look at the top comment, he corrected it his mistake 4 years ago
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
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
You are the best😭😭you have my respect. You are the best👏🏼👏🏼
Thank u so much!!!!! I usually don't comment but this explanation was wayy too good not to. I didn't quite get this topic at first when it was taken in my class but now I understand 💯
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?
Sorry I meant positive ions repelled towards the cathode
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.
Hi thanks for the reply. No problem at all.
I didn't understand this.
@@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! :)
Who’s watching this cause of online lesson
Me
Bro they are literally useless this guy here is a savior (A LEGEND)
I want to make pure iron from low quality iron ore.
me :'( online classes suck
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! :)
Thx. Really helped. Keep the vids coming
That’s great to hear - thanks Abdul :)
@@Cognitoedu You mean 'Bob' right?
@@AbdullahKhan15 do u know him irl?
@@AbdullahKhan15 they changed their username as the comment was 2 years ago it might have been abdul!
@@bugbea these guys r so dumb 🤣🤣🤣🤣
I am so stupid!!!!Oh god save my chemistry!!!
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.
I love this channel so much and I thank everyone involved in it
at 5:43 shouldnt the state symbol for the aluminium on the products' side of the reaction be solid and not liquid??
Isn't the oxygen supposed to react with the graphite to form carbon dioxide after being discharged since it's hot enough?
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?
Your formula for aluminium oxide at the start of the video is incorrect.
Cheers Chris just flagged it in the pinned comment 🤙
Thank you for this video. Helped me a lot
on the diagram don't you have to draw thhe cell the other way around?
Yes he has, the cell with the short line is the negative and is therefore the cathode and not the anode as shown
can anyone explain how i can balance the overall equation
you have made me the king of electrolysis
No
3:24 How do you know these atoms are positive or negative? does it show it on the periodic table?
@Ashika UPADHYAY Thank you so much :)
@@lewishancock2808i can’t see the comment what was the answer
@@Alan-tv3co yh what was the answer
Thank you!! This is gonna be in my test and I didnt understand it, I do now :))
Thank you, really helped.
This helped me so much
When the oxygen reacts with the carbon anode, does it not react with the carbon to form carbon dioxide?
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
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
@@aliabdullah6753 carbon reacts with oxygen to create co2 and that's why you have to replace the anode
@@indian-tech-support yeah you’re right
At 5:44 shouldnt the 4Al be solid?
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?
because its in ion form in the solution so when it removes electrons to the anode it becomes O2 gas so can float off
do other metal ores also get mixed with cryolite or is another process required for that?
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
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.
Anode is positive while anion is negative. Cathode is negative while cation is positive.
Wait..can someone tell me why aluminium is liquid at the end? Bcs i thought it was gonna be metal?
In solid the ions can't move
Oh okay thanks
Thank you, I understand now.
shouldnt he have used the shorter lines on the left?
thank you it was really helpful
Love this lots of help
0:31
I thought Aluminum Oxide was Al2O3?
Uh... Is the cathode and anode not the wrong way around in regards to the battery?
it is
Is this for higher or foundation?
Good work
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
0:23 aluminium oxide is Al2O3 not Al3O2
Who’s here NOT because of an online lesson?....
Practice chemistry paper 1 test tomorrow lmao :D
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.
i dont understand why the half equation isnt the 2Al+^3+ 6e- -> 3al
why is it just Al
not 2al
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
Thank you so muchhh
Wait… if you melted the ionic compound wouldn’t its heat melt the electrodes?
Not if the electrodes had an even higher melting point
@@Big_Topic what if it doesn’t? People usually use graphite or platinum, but their melting points, while higher, are not the highest.
Even though `I am studying at CIE Cambridge IGCSE... These videos are helpful
i still dont get it
Maybe try free science lessons
Why did we use carbon for the electrodes
Good conductor of electricity
And also cheap
Plus it won't involves in electrolysis process
How come the product gave aluminium as liquid state? Can u elaborate pls.
Akei bazli I’m assuming it is because it was molten liquid to begin with though I may be wrong
the solid liquid was heated and therefore state changed to liquid
Sir your subscribers and views are too less then you deserve ❣️
Ah thank you so much Asad 😊
@@Cognitoedu keep growing more and more☺️
"oxygen is being oxidised"
very interesting
Mashallah ❤❤
Hello to all the madhrasathul ifthithaah students 🇲🇻🦅🗣️📢
aa
Bruh the equation for aluminum oxide i al2o3 not al3o2
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
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 :)
@@omar.t975 but in the last video he said the opposite for extraction of metals
really confused here
@@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.
Its Al2o3 not al3o2
ily
If u hv trouble remembering the Neumonic Remember " AN OIL RIG CAT "
I think your cell symbol is another way around
oil rig it is
❤❤❤❤❤❤❤❤❤❤❤❤❤
Rizz icl
I'll get an A from all my sciences and let you know. Right now, I am C or B level
1 summer break later and here I am again
@@AB-lz5io so what’d u get
@@ihsan2837 A
@@AB-lz5io Nice
@@ihsan2837 thx
This shit is so confusing
100 comments :D
Man I wish i did GCSE..8.4.4 is just UGLY
amogn us