GCSE Chemistry - Extraction of Metals & Reduction #38

This video explains the terms 'oxidation' and 'reduction', and then runs through an example how we can use carbon to reduce certain metal oxides - forming pure metals in the process.

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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thats so helpful thank you!

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at the moment this channel is literally my best kept secret, the only reason I'm not failing miserably. When I graduate I will probably just recommend you left and right like "oh, you have a test? COGNITO!!"

[@Cognitoedu]

🤩 Thanks Ipek, comments like this are really great to read 😊

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[@susato5704]

Really helpful! I'm in year 10, and have been using this to revise for me chemistry mock exam. I love how it makes information, that I find hard to understand in a textbook, easier to comprehend! Will definitely recommend this to anybody who needs revision!

[@Cognitoedu]

Ah thank you very much Susato! we really appreciate it 😊

[@bexthet-rex]

how did your mock(s) go? i’m also in year 10; i’ve got some in january. have you got any tips?

[@susato5704]

I did good in my year 10 mocks, although I could have done better. Currently I'm in year 11,and I've completed my first set of mocks, I have mocks in February before the official gcse examinations in May. My advice is to make your you develop a good study habit, and a sensible one too. Cramming isn't good for you, and if you separate your revision into chunks whicvh you check on evetty few days, you'll find your memory retrieval will improve. I made a lot of mistakes in year 10 where I just copied down notes from a text book and called it revision, but it really isn't. For Maths I'd recommend doing some practice every day, 30 minutes at least. English Language requires you to answer questions in certain ways, so practice questions and be strict with your timing. For example, since I do AQA English Language, I only give myself 8 minutes to do question 2-3, to save time for the larger questions. With English Literature, it's about knowing the story and learning your themes and quotes, make posters and flash cards, but also practice essays. I'd recommend watching Mr Salles on KZbin, he's a very good English teacher. For example, I do a Christmas Carol, so I'd make posters and flashcards on the themes of The Christmas Spirit. For science, it's all about memory retrieval and knowing how to answer questions. Make flashcards for each topic and do practice papers, especially for Biology. If you have tests in year 10, take them seriously and put actual revision into them, and take your homework seriously too. It all counts as revision, and will save you a lot of time in the future. There are lots of revision methods, such as flashcards, mindmaps, quizzes, note taking, and saying it out loud. I'd recommend trying them out and seeing what you like best. I'd recommend 2 hours and 2 subjects per day. Here are a bunch of you tubers who are very useful: Science and Maths by Primrose kitten Cognito(obviously) Freesciencelessons Mathsgenie Corbettmaths Mr Salles Teaches English Mr Bruff Studystph UnJaded Jade I'd also suggest checking out exam reports and specifications, which you can find on exam board websites. Specifications tell you exactly what you need to know for the topic which is so so helpful in revision and you can learn from previous students past mistakes from the exam reports. My final advice is take care of yourself, and sleep well. Because you're in year 10 don't start studying intensely, but take these mocks as a practice of the real thing, and where you can improve.

[@badat9ly-_-235]

@@bexthet-rex ok so the mocks in march for some people depending on the school will not have as many subjects as the real ones. mainly just the core ones. I suggest sticking to the timetable and doing what works for you for revision although me personally I prefer videos like these ones. I'm in yr 11 doing my 2nd mock currently and ive never been fond of science but using videos like this got me from 4s to 7s and 8s in a week. Its really that simple! MAKE SURE you take your time and start revision now because TRUST ME before you know it youll be where i am right now. Best of luck. i might come back to this on the results day to compare how ive done.

[@isaacroy1160]

@@susato5704 Damn thats alot of useful info thats useful for me too thanks for that. How are your GCSEs going so far?

[@saadiasheik4900]

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This is so useful, thank you. Would you ever consider doing similar videos but about maths?

[@Cognitoedu]

Hi Lisa! Yes we do maths as well, just check our homepage :)

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@Louis McClean ok

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[@Cognitoedu]

Thanks, glad to hear they're helpful!

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This is so very useful, thank you. I was studying for the next standard during this lockdown period in our nation during the current situation of COVID19. Would you consider doing similar videos about space science and quantum physics? Thanks.

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[@Cognitoedu]

Thanks for saying so!

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Certainly this Is a very great video😊.. Very nice explanation....

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Very helpful and informative! Used info for notes

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Man i love how interesting chemistry is considering our entire world resolves around it and our entire making and the universe itself. But being 28 i feel like im too old to learn it now lol. I never want a job in chemistry or anything i just love learning about it.

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[@Cognitoedu]

Thanks Hamza-Yousaf, we really appreciate it 😁

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[@onlygoodvibes621]

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[@thespacekid8698]

Can we use MgO+Na that gives mg +NaO So we get mg from mg oxide and also Na is more reactive than magnesium Please answer

[@mashkoorulhaq4699]

nah, cus since na is also reactive it might react with the metal, but since carbon is inert it wont react with the metal

[@aphaedit2036]

It will be done by electrolysis

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Saving me the day of the exam💪

[@yourviralvideo2169]

Hey, if you can, can you separate the topics into two playlists for each paper?

[@Cognitoedu]

Alphie10 - hey thanks for the comment! For the time being we’re keen to keep them all in one, just for the simplicity of viewing the playlists. If this becomes commonly requested though we may well change it :)

[@mrpeter5017]

H

[@mrpeter5017]

C

[@cinammoned3874]

That was really helpful,thank you !!

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I feel betrayed by cognito because now I cant complete more than 2 questions then the website tells me " you have reached the daily limit".. I still love cognito and will cherish it but that made me disappointed and I'm afraid I can't keep my grades up

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[@asharun5421]

Hey Great video! Please could you make a video about alternate methods of extraction for this topic?

[@alishamiahh]

omg this made this so much easier I thought it was much more complicated thank you !

[@Cognitoedu]

Glad we could help Alisha!

[@lilianeluvsmusic]

im a student in singapore and am sitting for my gcse o level this year and almst all chem and bio vids has helped me greatly!! thank you so much 😊

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Oh same here but im studying phy with chem instead of bio

[@MrFiFaXdd1]

​@@armystaycaratmoa07I personally think, Chem and Bio are the best combination and Physics with Maths.

[@ZZ-ig4vz]

Your forgot to put aluminium in the reactivity series , is it more reactive than carbon?

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Subscribe to Cognito, he's a legend and like. He makes videos of every subject and spends his own time just to help us and he doesn't even know us.

[@lm2236]

wouldn't it be oxidation is loss, reduction is gain? (oil rig)

[@omarfarhanhossain3714]

that's in the case of electrons. Oxidation is GAIN of oxygen and LOSS of electrons. Reduction is LOSS of oxygen and GAIN of electrons.

[@lm2236]

@@omarfarhanhossain3714 ohh thanks so much

[@sahilasopa]

@@omarfarhanhossain3714 thx man i had same question

[@omarfarhanhossain3714]

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[@paulh4441]

If you reacted one Copper Oxide molecule with one Carbon atom, would it make Carbon Monoxide instead of Carbon Dioxide?

[@LynxMajic]

Hello and thank you! I got lost in the end with how the equation for iron oxide and carbon dioxide was balanced :(

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[@damsie64]

Can I just check, is the general formula for reduction: Metal oxide + Carbon -> metal + CO2? Like the CO2 is always there?

[@twopolaar599]

yep, tho you probably already figured that out by now

[@ynster1799]

thanks a lot！but i want to ask why oxide is changed to carbon dioxide but not carbon monoxide？ 2：05 😭🙏🏻🙏🏻🙏🏻

[@MrFiFaXdd1]

Because there's a 2CuO and to balance the equation we would've need to add a O2 to C

[@drealhmarie7367]

Isn’t the last bit displacement?

[@waheedanriaz261]

So helpful

[@ummmm55]

What grade is this for?

[@danamo_0416]

This is the British curriculum for years 10 and 11 :)

[@adambasharat3367]

@@danamo_0416 no

[@grumpypotato1149]

@@danamo_0416 It's grade 8 for Singapore!

[@danamo_0416]

@@adambasharat3367 the GCSE course is over two years which are year 10 and 11. Google it if you think im wrong.

[@danamo_0416]

@@grumpypotato1149 wow! you guys study this pretty early haha

[@safiulfaiyaz7038]

No complaints but all I could think about this whole video is "damn those oxygen atoms look like green RBCs, maybe instead of an Iron-based hemoglobin protein, they have a Chromium based one like how squids have copper-based blue blood cells"

[@tango3150]

Thanks a lot

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my finals are in 2 hours tysm

[@basimusmani7847]

ist the formula for extraction of iron wrong ? on the igsce biology text book it says something different . Please respond so ik which one is right

[@MrFiFaXdd1]

Biology and Chem both are different..

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Nice teach

[@fwmelloo]

THANKS SM

[@Shushshushshush221]

I’m a year 10 student My teacher told me that use the term OILRIG oxidation is lost reduction is gained and the vid is telling me the opposite can someone tell which is the real 1

[@Wojbest_YT]

bro same

[@ashleyyy955]

the term OILRIG means oxidation is loss of electrons, and reduction is gain of electrons. but oxidation is still gain of oxygen and reduction is loss of oxygen

[@twopolaar599]

yeah, oxidation is the GAIN of OXYGEN, but LOSS of ELECTRONS reduction is LOSS of OXYGEN, but GAIN of ELECTRONS

[@tezawr3963]

Thanks

[@Woolie1863]

Just putting a comment here since it’s school work so I’m making no sense I don’t know also subsbrive

[@dapheaoung2080]

Can i ask what this video about and I don't understand anything can someone tell me?

[@allft3838]

It's a topic to do with the reactivity series (some metals organised in order how reactive they are), metals (such as iron) aren't found in it's pure state, since it's reactive it bonds with elements in the air such as oxygen and that's why we find them as ores e.g. iron oxide. The video then explains the process of how we remove the iron from the ore through the process of reduction. Hopefully now the video makes sense, but feel free to reply if u need anymore help!

[@arfan3802]

@@allft3838 And im pretty sure he didn't get that either

[@ShahnawazKhan-xd6ib]

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[@yakulyee9326]

if cognito replied to this i will be happy

[@mochichaniseverywhere6047]

Remember OIL RIG guys! Oxidation is loss, Reduction is gain!

[@anees8913]

But then why is reduction the loss of oxygen?

[@twopolaar599]

@@anees8913 OILRIG refers to electrons, where OXIDATION is LOSS of ELECTRONS, and REDUCTION is GAIN of ELECTRONS. However, in terms of oxygen, OXIDATION is GAIN of oxygen, and REDUCTION is LOSS of oxygen. Hope this clears it up

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same bro like when ever i need magnesium a just use electrolysis and the build my house from pure magnesium

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before you come here to hate go to school and improve your grammar kid

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Q

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Yoo