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

Let's see the steps of electrolytic refining.

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[@decodingfinance5898]

Why does Copper at anode lose 2 electrons?

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

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[@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.

[@princekumar-tx9ti]

Can we use this to make alloys