AQA A-Level Chemistry - Electrode Potentials

[@arubamohammed4123]

"write to AQA and take it off the specification" sjsksjjsjs can i do that for the whole spec pls

[@ajtv6208]

It’s crazy how I’m learning the exact same spec as you did 6 years ago

[@saddish2816]

@@ajtv6208 bro im learni8ng this 4 days before the eaxams

[@user-vs1nh1rz8b]

@@ajtv6208you ready for paper 1 tomorrow?😂

[@ajtv6208]

@@user-vs1nh1rz8b that paper had me cooked 😭

[@jaidancheema4617]

you waffle bare sometimes but dunno what I'd do without you g

[@callum5370]

Don't go road on the poor man, he just tryna teach chem🤣🤣🤣

[@mano8783]

LLMAOOOO

[@ayo123]

Fr tho

[@foziaquaddus1823]

i just wanna say that this 23 min vid summed up PERFECTLY THE CONCEPT OF ELECTRODE POTENTIALS wayyy more clearly and to the point than my teacher could in a 6 week term. this is life saving at its prime Thanks so much !!!

[@dominicthompson7612]

This guy is a pure don... thanks for the videos mate, genuine help... look after yourself

[@ughmariam616]

‘we’ve got hydrogen gas bubbling in blublubblublibvlhb’

[@namrahnaveed7787]

I spent weeks trying to understand this yet here you've made me understand it in one video. thank you so much!

[@umaimahashif187]

Honestly I think you’re acc a lifesaver god bless you, your videos are amazing!

[@ragtagrey5920]

Honestly, you have been such a help. I really struggled with this before because I've been doing it in lockdown and now I understand it thank you so much!!!!

[@tylerhorn5949]

Chem 3 tomorrow morning, thank you for getting me through the last 2 years 🎉

[@imogenbrown6823]

me too! good luck!!

[@assassinscreedsyndicate4869]

Same here! Good luck to you guys!!

[@loopybrogaming1149]

I've got mine in like 2 hrs, I wonder where u guys are now 😯 in uni? 🤔

[@b_u9096]

@@loopybrogaming1149 where are u now?

[@loopybrogaming1149]

@@b_u9096 in uni dawg

[@Modelstl063]

Bruh exam on Tuesday last minute

[@mashedpotatoes1534]

YO SAME

[@beastroll8777]

how did you do?

[@Dewisd2002]

Same

[@zaidbacchus2371]

Lol this man is a legend honestly his snide remarks help me learn a lot more.

[@muzammilashraf9426]

Sir, Glad you're back.

[@antoniaashley3785]

Your videos are really helpful sir , could you make some videos on the required practicals as well

[@MrTherandomproject]

antonia ashley I

[@frankieb3264]

Yesssss

[@puddleduck1405]

yessss

[@E3JwKAa]

Great video Can you make a video on the Arrhenius equation?

[@ttoyee5985]

please do hydrogen-oxygen fuel cells in acidic and alkaline conditions

[@jessicaegharevba195]

Hydrogen gas bubbling bloor bloor bloor haha 😂 you are a funny good teacher

[@raidazaman866]

Absolutely love your videos! I would be extremely grateful if you made videos on Chemistry Unit 6 though (preparations and everything)

[@weypast9852]

could you make a video based on esters and the mechanisms related to esterfication please

[@lucastumilty9658]

thanks so so much i love your videos elliot. i saw you at the chem convention last year. was too shy to say hello

[@nosir1479]

If the emf of each cell is relative to hydrogen, how does it keep consistent with the physics definition of emf being the work done on the electrons per unit charge? Does it mean the work done on electrons in the hydrogen cell is 0?

[@ahmedafzal4002]

Its been a long dayyyyyyy without youuuuuuuu my Fraandddddddd, You Juicy Charismatic Beautiful Man. Hoping that you are well, thanks for everything Sir.

[@sammihollins-owen5024]

Super Eliot! Love your stuff! You make me laugh. Thank you.

[@emiwilliams3175]

thanks Elliot please make more they saved me

[@Manjndnxjx]

Sir,i really want to tell you,that you are a genius! I understand everything perfectly! Thank you very much for doing this!

[@TENIEKEN]

hey there Mr. E just the final part, think we were supposed to also balance out the electrons so it should be 2fe^3+ and 2fe^2+ Kind regards

[@samiultr]

You legend, quick q: How does imposing a high resistance on the voltmeter give a maximum value of EMF

[@samiultr]

surely, providing 0 resistance would give the maximum EMF value no?

[@atifmyman8802]

@@samiultr EMF is measured in volts; V=IR (voltage=current*resistance). When R is 0, V=0. When R is very high, V is very high.

[@samiultr]

@@atifmyman8802 i understand that but using scientific explanations rather tgan mathematical, how would you explain it

[@atifmyman8802]

@@samiultr ‘Why is a very high-resistance voltmeter used to measure a cell's emf? if you use a voltmeter having low resistance to measure a cell emf, it will cause voltage drop and hence you will not be able to measure it accurately because of voltage drop caused by cell internal resistance and voltmeter coil resistance.’ -This is what internet says but I don’t really understand it bc I’m not the best at physics

[@samiultr]

@@atifmyman8802 Yeah same...thanks though

[@wag1771]

at 12:35 surely the EMF would be +2.37V because the hydrogen electrode would favour reduction therefore emf = 0 - (-2.37)?

[@wag1771]

actually what exam board says that the standard hydrogen electrode should always be written on the left hand side?

[@MrERintoul]

My understanding is that it is a convention thing when using the SHE. As far as the SHE being on the LHS goes, again, my understanding is that it is a convention thing. By all means let me know if I've got it wrong.

[@fearlessbaek1583]

@ 9:09 , why is a mg electrode used but when drawing a conventional cell, a platinum is added?

[@ahmedali111]

its unreactive it is resistant to oxidation

[@eltonfernz9163]

great refresher! even for a uni course

[@bredymafana9041]

Is this the same syllabus with CIE one?

[@33pwton]

Sorry if you have seen the following message before. Do we get marked down if we don't include state symbols?

[@osianhj7272]

Yes

[@pfelstead3022]

How do you know when you need to use platinum and when you can just use the metal, for example why do you need to use pt on the fe2+/fe3+

[@lilymay1024]

P Felstead it’s because neither of them are solid they are both aq

[@Theo.31]

@@lilymay1024 why can’t you use a solid bar of iron??

[@darshan7771]

why would -2.37 mean its more oxidised? if it's a minus shouldn't it be gaining electrons therefore being a reduction?

[@osianhj7272]

-2.37 is not a charge value, it’s a potential value. Electrons move from areas of lower potential to areas of higher potential

[@saradaoud1061]

Very helpful! Thank you so so much.

[@thestudentroom]

Hi E Rintoul, Third time lucky :p? The Student Room has around 8 million visitors a month on our website and we'd love to work with you to produce some videos. Are you interested in collaborating?

[@AA-ew9qf]

thestudentroom lol u are getting aired so hard

[@sharifahmed6382]

ffs LMAO

[@LassiterVain]

AHAHAHAHA

[@dannyjohnson2418]

doesn't usually reply here, try twitter

[@ramn]

when will you learn he aint want you

[@jadagill6832]

Hi, just wanted to asked whether you include the concentration of water in an expression for Kc?

[@osianhj7272]

There’s no such thing as concentration of water mate

[@danhunt3327]

Can someone explain why the hydrogen electrode went in the left with magnesium. he also said the most negative always goes on the left? thanks

[@joelgayle6278]

Its convention standard hydrogen electrode always goes on the left bro

[@sicrick7356]

why not iron as the electrode like mg ?

[@ameidle]

You're a legend

[@monisamujawar2232]

at 22:31 does the order of Fe2+ and Fe 3+ matter in the conventional representation? Btw thank you for your video. you are a great teacher!!

[@marufahmed1293]

im pretty sure it does, because you want the more oxidised species next to the salt bridge if that makes sense? so you'd want the Fe 3+ first

[@hello-zf2fk]

@@marufahmed1293 yeahh im pretty sure its teh sepcies with the highest oxidation state

[@rabbitman8535]

@@hello-zf2fk yh you're right

[@fearlessbaek1583]

I LOVE YOU PLEASE COME BACK

[@audreypalmier2471]

Wow well explained thank youuu! ♥

[@gbarring]

Why is the state for platinum (S) not written is it not needed?

[@meankle4122]

it is

[@Masculinity-]

how do we know when would we need Pt in the half cell?

[@hello-zf2fk]

when there's like a gas in teh half eqn or the reactant and product are in the same pahse (eg: aq Fe 2+ and aq Fe3+)

[@ayo123]

​@@hello-zf2fk why?

[@abdulhaseeb3563]

No problems , Thank u so much ...

[@leeho4716]

Is it always the right hand side the positive one when we draw it?

[@anjalihariprasad3338]

for the conventional cell representation- yes, right hand side is reduction(positive) (apart from when using the standard hydrogen electrode) but if youre just drawing a diagram (beakers and stuff) then it doesnt matter

[@henryt2229]

17:18 'now annoyingly there always has to be exceptions or it wouldnt be chemistry really' HAHAHA so true its painful

[@coolcat123456100]

my a level is next week an i never got this until now!! THANK YOU SO MUCH!!!

[@mauthoormotasim6332]

what happens to the E value if we increase the concentration of fe3+ or fe2+?

[@BasherBadBoy786A]

So when do you need a platinum electrode?

[@rushkabab]

if you don't have any solids on one side of the cell you need platinum to attach your wires to

[@BasherBadBoy786A]

Rushabh Shah Thank you

[@mauthoormotasim6332]

electrode potential of copper is +0.34. +0.77 is for iron.

[@mauthoormotasim6332]

nevermind me.

[@azibayani3950]

What are the reasons for using kno3 or kcal?? I know that they both are highly soluble and also kcl reacts with cu2+.

[@roman20353]

Is there a reason why you always have to write Mg(2+)+2e---->Mg instead of other way around?

[@roman20353]

Hi, Thank you for replying..also, can you clear this up for me?...If oxidation is taking place in the "left" electrode do we say the metal on the left is being oxidised?

[@maryanjama5092]

Thank you so much

[@jontyclark6630]

Please could you tell me what the equilibrium would look like for the fe2+ & fe3+?

[@izluc9378]

Why do you need a Pt electrode for Fe2+/Fe3+?

[@Lara-vm2ki]

Both of the ions are aqueous so the Pt electrode acts as a platform for the oxidation/reduction reactions (if that makes any sense)

[@sakibulislam938]

12:45 - look at the like button.

[@jodiegreen66]

0:49 oh i wish

[@daisylawrence7447]

so helpful, than you!

[@bovaladusika3432]

❤ u de best 🎉🎉🎉e

[@lfcrags9715]

Bro u did the EMF wrong for hydrogen and magnesium. It’s 2.37 nit -2.37. Reason is because EMF is reduced minus oxidised. So hydrogen is being reduced as it’s more positive.

[@user-tz5pz8ev7u]

nah mate he's right. Hydrogen electrode is being used a comparison hence why he said its not the conventional way you would write but thats how you do it for a Standard Hydrogen electrode.

[@helenhamilton2544]

What's the difference between EMF and electrode potential ?

[@19Mariya26]

Electrode potentials are for individual half cells, emf is for a full cell :)

[@georgefrost5348]

This is best to watch at 1.5 speed if you're cramming the night before

[@zahlemat2192]

can you please please do a video on enthalpy of solution? thanks

[@ihuss007]

PURE JUICCEE

[@isbahmunir9088]

i agree!!

[@firstnamebasis3300]

You don't need to remember the value right?

[@MrERintoul]

First Name Basis which?

[@anjalihariprasad3338]

need to remember the hydrogen one is 0 but otherwise you get given all the values

[@XYZ-kp9dr]

MARRY ME ? ♥

[@valentinagiannitelli5896]

he's so cute

[@vanessak7811]

thank you for existing you've saved me from chem hell

[@alizehm341]

thank you for the effort sir

[@ajaykrishnabalasubramanium3450]

keep going your amazing

[@mrbenz6227]

Nice name

[@artupayrus]

man lyke submarine

[@johnpaul4301]

you sound a bit like Gary Neville

[@hamzah7730]

he does abit HAHA!

[@hridyamanoj8205]

Thank you so much this really simplifies it (TT) that's tears because I think I actually get it

[@InfiniteExia184]

7:56

[@humayrakadir5853]

The more I learn of chemistry the more I want to throw up

[@ME-xh5zq]

Nice

[@phillipschristian2]

SHITE.

[@MrERintoul]

Thanks for the comment! I just checked out your channel with free videos for students. Oh wait.

[@firstname3033]

ahhaahhahahaa great videos.... thank you!!!!!!!!!

[@ramn]

7:54

[@EsotericMedic]

what