O-Level Chemistry . IP Chemistry: Selective Discharge of Ions in Electrolytic Cells - Part 1

#seanchuachemistry #olevelchemistry #ipchemistry
This video is Part 1 of a two parts series on the Selective Discharge of Ions in Electrolytic Cells.
It is based on what we share with our Secondary 4 GCE O-Level Pure Chemistry and IP Chemistry students in our weekly Sec 4 Pure Chemistry Tuition Classes.
In an aqueous solution, more than one type of cation and anion are present in the electrolyte. However, only one cation and one anion are preferentially or selectively discharged during the process of electrolysis.
If the electrodes used during electrolysis are inert, the ions being preferentially discharged will depend on three factors:
1) Selective Discharge of Cations
2) Selective Discharge of Anions
3) Effect of Concentration on the Selective Discharge of Anions
All the three factors will be clearly explained in a step-by-step manner and examples will be given so that you can apply immediately.
To learn more about Electrolysis and other basic Chemistry concepts, visit our blog at www.SimpleChemConcepts.com
See you there! Discover how you pass Chemistry with distinction
For more O Level Pure Chemistry. IP Chemistry learning resources, go to www.SimpleChem...

[@bmzaron713]

Man this is exactly the video I was hoping to find on electrolysis.. I liked how you brought up the 'more reactive' topic of metals.. I think that terminology makes sense for displacement reactions/ oxidation of metals but with the cathode interaction, it helps me to think of the electronegativity of the cation in question/ which has a greater 'pull' of electrons.. Man this video was so great man! Thank you so much

[@ramanahlawat398]

sir can u please upload some videos for ionic equilibrium. Your explanation is amazing and to the point

[@rebeccalam1068]

thank you So much for this explanation sir. Much easier to comprehend than my textbook

[@SimpleChemConcepts]

You are most welcome

[@phyllisnchimunya]

Amazing, you are great at explaining🎉.

[@himayasandini8003]

The best explanation I hv ever heard bout electrolysis .Thank you so much sir ,really helpful .

[@SimpleChemConcepts]

Thanks and welcome

[@EmanFatima-d7w]

amazed by how good u explained

[@dwivedidivyanand971]

I really appreciate your efforts sir... sorry for not being ubiquitous. I just loved the way of your teaching. Understood the whole concept at once. Thanks a lot sir!. 🖤🖤

[@SimpleChemConcepts]

You are most welcome

[@SabaAnayet]

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[@SimpleChemConcepts]

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Good video ,liked

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Best explanation ever!!!

[@SimpleChemConcepts]

Glad it was helpful!

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[@fake2044]

why does concentration only affect discharge of anion but not cation?

[@ling6365]

Thankyou for teaching...I understand more now:)

[@SimpleChemConcepts]

Great!

[@Affan_911]

in the text book Ca is above Na in the series,not sure which one is correct

[@fatemaabdulla2728]

Luvd it

[@AdityaSingh-uh4wf]

Wonderful explanation!

[@SimpleChemConcepts]

Glad it was helpful!

[@jurellejohn]

Thanks so much, I understand way better now👍🏾

[@SimpleChemConcepts]

Great!

[@swagotosurjodutta7341]

Thank you very much.

[@zenixlo]

Hi, its called GCSE chemistry now.

[@johnlinda9734]

why sulfate and nitrate ions are not discharged even at high conc?

[@arsemaworkneh9236]

It was very helpful thank you

[@SimpleChemConcepts]

Glad it was helpful!

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Woww it's useful. Recall back wat i hv learnt in SPM, But i forgot dy ahahahha. Tqvm for this video

[@SimpleChemConcepts]

Glad it was helpful!

[@bk5265]

Thank you ever so much, much love👍👍

[@SimpleChemConcepts]

You are so welcome

[@amnaimran5537]

Thank you very much for all of the lecture

[@SimpleChemConcepts]

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thank you so much! this was so helpful

[@SimpleChemConcepts]

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[@johnpraise1856]

💜

[@rollypolly6014]

Very good

[@anjanaprabath9664]

i was troubled when my teacher told that clorine will always dichrge first when in an aqueous solution. is it true i am really confused. can you pls help.❤❤💕💕😥

[@RafidBlog]

OMG same LOL

[@RafidBlog]

Are u clear now?

[@shubhrajitsadhukhan3592]

How does this apply for chlor-alkali process??

[@assaineindustries]

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[@SimpleChemConcepts]

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[@vikramkashyap1887]

From India

[@sherazmalik9647]

Can you please explain why metals lower down in the reactivity series( electrochemical series) are preferentially discharged in electrolysis

[@willyou2199]

This question difficult to answer. If you'd like the correct answer you'll have to go to reduction potentials, the underlying mechanism is deep quantum mechanics. Here in Os they just give it to you as fact and you swallow and regurgitate. But to answer your question, i have a pragmatic way to think of this. Take for example 2 cations compete to be discharged, say K+ and Na+. Both are reduced and discharged into K and Na atoms. But because Potassium can displace sodium in reactions, K will again displace other Na+ ions to become K+ while the Na+ becomes Na. What happens is regardless, you'll end up with more Na atoms than K atoms. This is what realizes as "preferentiality" in the macroscale.

[@willyou2199]

This is also why, say dilute aqueous solutions of NaCl liberate O2 at anode, while conc aqueous NaCl liberate Cl2. Its ultimately OH- and Cl- competing, and while there's some electro potential at work, but because there are so many more OH- than Cl- in dilute solutions, OH- wins by simple probability. Conversely conc solutions Cl- wins, and Cl2 is unable to displace OH from H2O directly, which again lends it dissimilar behavior from cations; that concentrations cannot affect cation discharge but can affect anion discharge.

[@adityaswaroop7430]

@@willyou2199 Unlike going to deep mechanic we can just comprehend in a way like ease of discharge corresponds to the gain of electron. If ease increases down the series the potential to gain electron increase.. That's why Cu+ having more ease or electrochemitivity than Na+ have more potential to becone Cu than Na or Na becomes ion much more faster than Cu takes to become an ion.

[@the21podcast]

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[@SimpleChemConcepts]

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