GCSE Chemistry Revision "Electrolysis of Aluminium Oxide"

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still aiding failing students in 2019. Bless your soul

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and 2023😭

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2023

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Remember guys, “I’d rather get an A(node)+ than a C(athode)-“

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you can always use PANIC: Positive Anode, Negative Is Cathode

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did you??

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Freesciencelessons i love the fact that you teach a whole topic under 5 mins you are so informative and the best science teacher. Thanks

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OMG LOVE YOU MAN U R THE BEST U NEED AN AWARD FOR THIS, I WAS SO CONFUSED ABOUT ELECTROLYSIS BUT U MADE IT SO SIMPLE LOVE U!!!!!!!!!!!!!

[@Freesciencelessons]

Thanks for the comment. Electrolysis can seem tricky but it's straightforward once you get the ideas.

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[@alslalslasd8894]

Do you remember any question in your mocks about electrolysis? I have my mocks coming up and I’m not the best at this topic. Thanks

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Alslalsl Asd Solve past papers.

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[@Freesciencelessons]

Thank you. I appreciate your comment. Good luck in all your exams.

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@@hi-pg9bp yes watch his videos, make sure u've covered all the points from ur board specification and then go over past papers. at first, u might not be able to answer the questions confidently but don't lose hope, go over markschemes, identify ur mistakes and keep doing past papers! u'll eventually be really confident in the end. good luck!

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@@birdie7344 chemistry paper on Friday it’s sooo hardddd

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@@birdie7344 THANK uuuu i didn’t see this comment sorry !! but we have chem tomorrow good luck 💕💕

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I used to be very bad in chemistry but thanks to u I have got an A this semester. Appreciate ur work

[@Freesciencelessons]

Thanks for the message. I'm happy to have helped.

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honesty such a legend, you've taught me more than my chemistry teacher has. Thank you so much!

[@MrPinguino25]

Wish I revised earlier😂😂I’m going through the whole chemistry playlist. Pray for me😂

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How did it go?

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I do triple science, and i've struggled with this topic the most, you've literally saved my grade

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Thank you so much sir, you are the best teacher, so happy to have you and we all l students love you so much. You are a lifesaver wallahi. Lots of love 💖 ❤️❤️❤️ and you are a hero 🏆🏅🎖🥇👨‍⚕️👌🙏🏻

[@Freesciencelessons]

Thank you, I really appreciate that. At this stage, I'm coming towards the last section of videos and am starting to feel like I've not stopped working for about a year, so your comment gives me the energy to keep at it.

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[@chaoticartist1305]

i used to find electrolysis SO FRIGGIN HARD but now I can conduct this information into my exam easily!

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Lol still saving grades in 2024 what a legend my grandkids will probably still watch this amazing man's videos thank you sir

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@@shaheer_04 im doing my gcses at the moment, and If I dont understand a particular topic; I too lose my purposes in life lol

[@source873]

Oxidation occurs at the anode and reduction on the cathode. Learn it like : An Ox Red cat.

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This guy only thing keeping me going in 2020🥺

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5 years later still the king

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Thank you for actually making panicked students understand such a tricky topic

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His introductory smile is priceless! I love this guy!

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and his ending smile

[@Hannah-rs5oi]

This is so helpful thank you! I just have a question. When I learnt this at school, we were taught that the cathode is the cell lining in a steel case but when I have come to revise, my revision guide and here is different. I was just a little confused about which one I should learn and if a question came up on the test which way would I explain it? I also just want to say thank you so much!! You have helped me so much so far and I will be definitely rely on these videos when it comes to next year :)

[@zalez7832]

Thanks very useful, got mocks this week so hopefully this helps

[@Freesciencelessons]

Thanks for the comment. Good luck in your mocks.

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I have mocks and Cambridge exams beginning this Tuesday.

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This guy single-handedly taught me a couple months of work in only a few hours. I am so thankful for your work it honestly saves me

[@duaa7576]

Cations (positive ions) are attracted to the cathode (negative electrode). Anions (negative ions) are attracted to the Anode (positive electrode). I guess it's easier to remember when you think about it from this perspective

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HE SMILED AT THE START OF THE VIDEO

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Quite professional thank for sharing. Is there any example for energy consumption to convert 1 kg al2o3 to aluminium and other expenses including the catalist cryolite.

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OIL RIG oxidation is loss (of electrons) Reduction is gain (of electrons

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GCSE tomorrow bois

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what you get?

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Hi sir, I find your videos very useful. My exam board is the WJEC and I find that most of the videos from the AQA syllabus are co-ordinated with the WJEC syllabus. Would you mind creating a video on Newton's three laws of physics as I believe you are the best person to teach me!

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Maybe you should do like a full revision guide for 3 Science Subjects; Physics, Biology, Chemistry!!!

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A hero of our generation

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saving gcses in 2021 lets gooo exams next week thx a bunch sir

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not me doing last min revision since I had 4 exams in just 2 days and couldn't catch up with chem

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I find these videos so helpful, feel life-saving, thanks so much !

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better than a 9 hour lecture

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Paper 1 Friday

[@LyricalLemon]

remember guys : OILRIG : Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)

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while we were all enjoying star wars day in 2017, little did we know shaun was saving out gcse's ...

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Respect to this guy !

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These videos made by day.

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Sir, I am very thankful to you.

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Just a question for 0xygen minus why is adding an electron and not minus?? Or do we n ok t need to know but just memorise it

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This guy combimes 'Individual learning' and teaching a big BIG class simultaneously and efficiently.

[@garvick20]

Sir ...Great video. Can you please clarify (with an explanation) if this reaction is exothermic or endothermic? Thank you.

[@rashan6681]

Electrolysis is endothermic because it requires energy from the surroundings, he states it in one of his videos

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[@owaisali8344]

How do we know the charge on each atom

[@Freesciencelessons]

Group 1 ions have a 1+ charge and group 2 ions have a 2+ charge. The aluminium ion is 3+. Group 6 non-metal ions have a 2- charge. Group 7 non-metal ions have a 1- charge. Any other ion that you need for these type of question will be given.

[@chipapao3662]

thank you sir

[@Freesciencelessons]

No problem and thank you for the comment. I appreciate it.

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Freesciencelessons would electrolysis be the same for copper sulfate to extract a pure sample?

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thanks bro my chemistry gcse is tomorrow

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I learnt more from this than my term of trilogy science

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I'm glad that my videos are helping.

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Good luck to everyone doing chemistry tmr! ❤

[@notfarinthepast7212]

For the half equation for oxygen, is the correct answer not O*2_-O2+4e*_

[@irinakuznetsova3739]

I have a question- why do we need to double the equations? (3:35) and do I need to double the equations in the exam?

[@Freesciencelessons]

We need to double the equations because the gases produced (eg Cl2, O2, H2) are all diatomic molecules (ie have two atoms in the molecule). So we cannot show the equation for just one atom as that would be inaccurate. You would be expected to double the equation in the exam.

[@ahmedelamin1499]

Sir what if bromine ion becomes an atom and doesn’t have another atom to bond with does it spread as bromine gas or not?

[@nizomiddinblog6272]

very well explained thank you very much teacher

[@everythingtv4875]

will we be given the ions or do we just have to know it? Thanks !

[@Freesciencelessons]

You are meant to know aluminium oxide but for other ionic compounds you should be given the ions (or enough information to work them out).

[@danielglass2429]

First of all, thanks for your excellent videos, they really help. Do you know if I have to know precisely this example for the exam or do I just need to know electrolysis basics and principles, e.g cations to the cathode etc?

[@Freesciencelessons]

Thanks for the comment. You need to know the specific examples that I show in the video. They are all in the spec.

[@danielglass2429]

@@Freesciencelessons Thanks so much for replying so quickly, didn't expect that :) Just to clarify- it isn't just an example (in the CGP revision guide it just says it's an example-look at pg.56 Edexcel Chemistry 9-1), but an example that I need to know exactly?

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@@danielglass2429 its aqa lol

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I love this guy.

[@arjunsivaraman3382]

How does the oxygen ion lose 2 and become neutral - doesn't it need to gain 2 electrons to become neutral (as its a halogen)??

[@billiejean685]

I am a bit confused.if a metal forms at the cathode if it's less reactive than hydrogen.why does aluminum form isn't is more reactive than hydrogen.

[@wg8375]

3:10 i prefer to write it like that

[@sxm9998]

same its a much easier way of remembering

[@dalsenov]

Great lesson! Thanks!

[@sandjaiasarfi4506]

What if I just use normal + - pools instead of graphite

[@ghostechafg3097]

I'm confused how can Al 3+ gain 3 extra electrons and be neutral it will have 15 electrons now. Shouldn't it lose 3?

[@adz9409]

I know where you coming from, however you need to remember that electrons are negative. So when it gains the three NEGATIVE electrons it cancels out the 3+, as 3-3 is 0.

[@PurityOloghoejebi]

Do you have to remember the doubled version of the oxidation half equation at anode

[@Freesciencelessons]

Yes that's really important. You need to learn it.

[@Nolnaho]

Can you explain it for anything other compounds and if it's not molten, is there a difference if it's dilute or concentrated?

[@sadiehart8321]

is it only when solutions are dissolved in water, that at the cathode hydrogen is produced (if the metal is more reactive than hydrogen) or can this happen in melted solutions as well? please respond!!

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A BIG thank you!

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