Electrolytic refining of metals | Metals and non-metals | Chemistry | Khan Academy

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Providing

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[@defaultxyz]

I never fully grasped this concept until now. Thank you for your help!

[@divyasharma3185]

But sir my question is that ...we can only get metals from earth crust and pure metal by refining it ...then from where we take pure metal wire ... the wire which you said we can take from market .that came from where?

[@Aarush1-INDIANEXO-L]

That metal is produced by much complex and time consuming method ,thus taking a copper which already pure by such method and doing electrolytic refining is easier

[@Aarush1-INDIANEXO-L]

In the complex process , the crude metal is heated and very high temperatures and reduced with the help of reducing agents .

[@HalalStudyTracks]

​@@Aarush1-INDIANEXO-LHey,can u solve my doubt? See at anode ,Impure copper loses 2e and these 2e move towards towards cathode where the copper (copper after its gets refined) gets eventually deposited and gets 2e which were released by itself at anode.So how is the reaction correct? Like reactant at anode and product at cathode is just the same.

[@Aarush1-INDIANEXO-L]

@@HalalStudyTracks I did not get your question but here is a simple way to explain electrolytic refining. once electricity is passed in the soln , the electrolyte (soln) breaks down into its constituent elements for eg take cuso4 electrolyte for refining, which then breaks into cu2+ and so4- ions. the cu2+ ions(of the electrolyte) will now move towards cathode (the strip containing pure metal) . Because these ions moved there ,the amount of cu2+ ions in the electrolyte will of course get decresed. and because they got decreased the ions of cu2+ from cathode(impure metal strip) will start coming off the cathode and come into the electrolytic soln to maintain the amount(volume) of the electrolytic soln

[@GURUPROMAN]

​@@HalalStudyTracksthat's what we want as we pass electricity they energize and lose 2 elections anode and cu2+ ion is released into soln and the cathode will be more electronegative by having more electrons will attract cu2+ ions. The products are the same but the places are different right i hope u got the answer.

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[@Radnimohekar]

The ending question really cleared all the doubts 😊

[@Saubhagya-Sahu]

Explaining excellently.... Thanks a lot sir

[@decodingfinance5898]

Why does Copper at anode lose 2 electrons?

[@sreejas3503]

Amazing explanation. Thank you very much....

[@venkatlakshmi-3498]

this is a real help for my seminar ,thank you so much🎉🎉🎉🎉🎉

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[@sakshigaklhar2173]

Thank u sir,, you explained it wonderfully

[@AashishKumar-hb3iw]

I have seen many videos on electrolytic refining but this is the best of all as compared to other 🎉🎉😂😂😂

[@shaikgaleebsha5835]

Excellent explaintion

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Very good explanation 🙌🏻

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You make us ask questions and make sure that our base is strong

[@themanwithapan8649]

I have a question - if you were doing this process at a large scale, does the size of the cathode matter? If you had a huge cylinder of an impure metal as the anode, but an extremely thin wire of the pure metal as the cathode, would the process still work?

[@kiranbhat4902]

Knowing concepts Is enough.....

[@themanwithapan8649]

Kiran Bhat buddy I’m here to learn stuff, not half-ass it for the BOARD’s

[@kiranbhat4902]

@@themanwithapan8649 OK self proclaimed metallurgical engineer let's see who scores more in boards....

[@kiranbhat4902]

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[@kiranbhat4902]

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[@KrishnaAggarwal-el2xy]

Thankyou so much for giving such clearance on this topic ❤

[@nsowdkar]

Sir what would would happen when half of the metal in electrolyte becomes over and will copper be deposited only in the cathode present in electrolyte or also above it ?????

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[@sumisubramanian704]

So we'll explained.. Thanks a lot for clearing concepts

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Superb explanation sir

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[@dr.masapoguyellappa1587]

nice video with good explanation

[@ashokkumarmannepalli7226]

Very helpful, please tell me what happened to sulphate ions

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[@nishaxib4434]

@khanacademy due to metallic bond , a solid block of metal does not contain neutral atoms but it contains cations and sea of electrons So electricity will not produce cu ions here Also electrons do not travel back to the source of emf, if it does then it will damage the source

[@navjotsayal1690]

Is it correct? I mean what is the use of electrolyte of same metal. Isn't the electrolyte dissociates first ?

[@evileye17]

I have a doubt... Is it necessary to use sulphate salt? I mean can i use copper nitrate in this set up?

[@status6421]

U can use copper nitrate, but sulphate salt is easy to reminder during exam, we just have to use acid of that same element.

[@rahulsingh-pf5xn]

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Super explanation 👌

[@ramalakshmi3286]

Amazing explanation

[@nandhanampatiprakash8191]

😊 I can understand easily Thanks a lot

[@aabishegaabi6047]

Well explained sir. Thank you

[@bidishanag4198]

why would the copper atom in anode lose electrons ?please tell me

[@The_sazia]

I want also know this

[@skullbee5269]

Its due to Electric current which break Impure copper into Cu^2+ and 2e^- .... thus those electron move towards positive terminal Hope you get it 😉

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[@justedit510]

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Very much helpful sir 👍🙂

[@rohanmagar7418]

I have one question. What if impure electrode loses some Fe2+ ions , will they deposit on cathode? (Talking about purification of Cu)

[@skullbee5269]

No matter which metal you take for Purification ... It will breakdown in charged ions and attract towards cathode .... But If u take iron impure ore and try to pure it .... u have to take Pure metal of Iron and acidified Iron sulphate solution ..... But in this case as u said .... Iron layer will get deposited on pure copper if solution is acidified Iron sulphate

[@Sunshine-mf6lw]

Thankyou so much...u really made my huge doubt xlear

[@grakusgg6059]

Very well explained.

[@meghasharma7746]

Sir I have a question, H ions generated due to acid will also migrate towards cathode , so the copper obtained won't be contaminated with hydrogen?

[@faxedits8]

Did u get the answer

[@faxedits8]

Or in my opinion As it is said that copper is 99% pure so 1 % are that impurities H2SO4 is very low in quantity here

[@meghasharma7746]

@@faxedits8 yes sir . This can be the case . Also I read somewhere that out of the two ions only one migrates and other one is left behind . So this may also be the case, that out of copper and hydrogen ion, only copper ion migrates and not the hydrogen.

[@saumyayay]

amazing explanation! thanks a lot!

[@vineshkumar-td5xt]

Best lesson ever on you tube

[@princekumar-tx9ti]

Can we use this to make alloys

[@saswathjain]

Super 👍🏻

[@Korean747]

Thank you sir now I understood clearly

[@prathikshasrprathikshasr-fy2xs]

Sir , I had doubt that At anode containing impurities, ( it means it contain any compound) if it is always loose Cu²+ ions My question is that An electro rod at anode loose any other compound what would happen ???

[@shivamvikal9473]

well explained 👍

[@AvniSingh-f7w]

The explanation is best sir but we write ions as Cu2+ not Cu+2 ...

[@snehalatarout2543]

Sir why cupper loose electron? Sir please help me

[@mithunnarayanan6389]

because its connected to cathode

[@snehalatarout2543]

Thanks sir

[@mithunnarayanan6389]

@@snehalatarout2543 no i am not sir

[@devanshbhardwaj9810]

How are you sir😊​@@mithunnarayanan6389

[@anubhavshankhwar]

Can someone please explain me what happens to the sulfate ions in the solution?

[@skullbee5269]

Those sulphate ions recombines with Copper from Anode and The pure copper which Sticks on cathode came from the breakdown of ACIDIFIED COPPER SULPHATE SOLUTION.... And not by Anode .... Hope you get it 😉

[@anubhavshankhwar]

@@skullbee5269 Thanks ☺️

[@skullbee5269]

@@anubhavshankhwar My honour ... hope we get fine marks in boards LMAO 🤣🤣

[@anubhavshankhwar]

@@skullbee5269 yeah🤦😂

[@tamizharasiramesh3227]

Very nice explanation

[@Anshuman296]

Lovely

[@arjit3703]

Cathode pe - charge hai to Cu-ions anode pe kyu nhi jate

[@SumitSharma-xk1bz]

Fabulous explanation

[@rudrabrahmbhatt9925]

👐 Thank You so much SIR

[@mohitraj5888]

thank you , it help me a lot .

[@flgnsngh]

Excellent. Thanks

[@kiranfemura6106]

what happen if you take another metal salt?

[@magicofbreak9540]

So how pure copper was obtained in the first place?

[@arnav.k9650]

Thanks to you My smooth brain is now slightly wrinkled

[@navalrajoriya8855]

Why impure copper is taken as anode and pure copper is taken as cathode???

[@nishaxib4434]

It is so because copper ions are present in the electrolyte which gets attracted to the negative electrode (cathode) when electricity is passed through the circuit

[@nishaxib4434]

If you do the opposite connection that is impure copper as cathode and pure copper as anode then on passing electricity the pure copper rod at anode will lose cu ions and this will get deposited to the impure copper rod which is not desirable

[@AdityaSingh-fk5ve]

@@nishaxib4434 bilkul shi

[@tanishqadas2953]

But what about sulphate ions . What happens with sulphate ions?

[@skullbee5269]

Those sulphate ions recombines with Copper from Anode and The pure copper which Sticks on cathode came from the breakdown of ACIDIFIED COPPER SULPHATE SOLUTION.... And not by Anode .... Hope you get it 😉

[@awanishyadav6958]

Excellent Nice Fabulous