For anyone who would like a more simplifed version of the cell notation then this is how I do it. So think "ROOR" like Katie perry's song and think R O O R - reduced, oxidised, oxidised , reduced, rather than thinking about how close the ZN2+ is to the salt bridge think about which thing is being reduced or oxidised.

@darko6115

2 жыл бұрын

it's also how you write a ester

@mohammadahmad-qd1td

Жыл бұрын

That's helped so much. Thanks

@snipesjuanr7762

3 ай бұрын

If u can't even memorize ROOR you are bit fucked bro💀💀💀

[Timestamps] Electrode Potentials and Cells (1.11.1) 2:51 = Half Cells 5:26 = Electrochemical Cell Set-up 10:23 = Electrode Potentials 15:26 = The Standard Hydrogen Electrode (SHE) 20:10 = The Electrochemical Series 24:39 = Calculating Standard Cell Potential 28:15 = Conventional Cell Notation 31:51 = Predicting Reaction Feasibility (+ finding overall equations) ***** Commercial Applications of Electrochemical Cells (1.11.2) 37:39 = Batteries: Rechargeable/Non-rechargeable 39:52 = Lithium ion battery: half/overall equations 42:20 = Fuel Cells 48:09 = Advantages + Disadvantages of Fuel Cells

@Sami-se8bw

3 жыл бұрын

god

@lookunderyourtable8503

2 жыл бұрын

Rachel Doran? More like LEGEND DORAN TYSM

@y3h_akh953

Жыл бұрын

you are a beauty for this

@noornazir7620

5 ай бұрын

cheers pal

@leenoooo498

Ай бұрын

U absolute angel

you're a hero. Paper 1 is tomorrow and I never understood this until now.

@AT-fz6wf

5 ай бұрын

Did u do well?

@s4lly79

3 ай бұрын

Same my paper 1 is in 4.5 hours😭🙏🏾

@neldino1251

2 ай бұрын

@@s4lly79 bro a levels are in june

@shadow_kxng7972

2 ай бұрын

@@neldino1251 Late but it was prob mocks

bestie ur getting me through my a levels i hope u know that-

@UNKNOWN-jk6wv

2 ай бұрын

Would you like to be my second wife? xx

brilliant teacher, been struggling with this topic a little and this video has really helped my revision and filled some gaps thanks mate :)

At 22:00 you mention that reduction is the loss of electrons; is it not gain? And also you mention that a reducing agent gains electrons but will it lose them?

@SinCosTanha

3 жыл бұрын

Hi he must have made a mistake, reduction is gain of electrons and a reducing agent loses electron, basically gives electrons to the other species causing reduction (gain of electron)

@danielwalsh.3835

3 жыл бұрын

Hi, I think that was a minor mistake; reduction is the gain of electrons and reducing agents themselves are oxidised.

@zaynabyusuf5610

3 жыл бұрын

Noticed the same thing

@alishas7960

3 жыл бұрын

Yh it was just the slip of the tongue. A reminder to get it the right way round in ur exams!

@kavishawaidyaratne9865

3 жыл бұрын

Was looking for this comment lmao

if I can crack these questions now, all the credit goes to you and miss natalie❤

Thank you so much sir I just discovered your channel and you make the most efficient videos ever!!

READ THE DESCRIPTION AS HE HAS MADE A SUBTLE ERROR IN THE VIDEO.

thankss! do we need to fully know every single step of the reactions in the fuel cells?

@44:44 i thought the negative electron was the ANODE?

great videos! can you please do some videos on aqa required practicals please

physics don't leave me alone

@akihayakawa788

Жыл бұрын

fr

@UNKNOWN-jk6wv

2 ай бұрын

I won't leave you alone.

@nimrahhussain1930

29 күн бұрын

@@UNKNOWN-jk6wv thats creepy

Have a test on this tomorrow! Thanks for this video it’s really helpful :)

@AlleryChemistry

3 жыл бұрын

Glad it was helpful!

do we need to know word to word the nine steps of the alkaline hydrogen oxygen fuel cell or just the 2 equations on the summary

I have a PhD in chemistry and just started teaching chemistry in a secondary school and I find your teaching is brilliant. I even advise my students to watch your channel. So, many thanks for all great videos you have produced.

@AlleryChemistry

Жыл бұрын

Thanks for using them and for recommending them, really appreciate it.

@jafwonta

Жыл бұрын

Why didn’t you go into a job in your field?

@staldani

Жыл бұрын

@@jafwonta that's what I wonder about alot of teachers

i loved how u linked no problem with electrode potential thank you sooooo much!

@AlleryChemistry

Жыл бұрын

You're very welcome 😀

@UNKNOWN-jk6wv

2 ай бұрын

wanna make a link with me?... ;) +----- 🔋 ( I'm 23) (resitting for the 5th time) (on u xd)

@UNKNOWN-jk6wv

2 ай бұрын

never assume malice when it can be explained by stupidity

@mrvlone2622

28 күн бұрын

@@AlleryChemistry imagine you replied to that persons comment saying " No Problem" Loool

you no what your a NO PROBLEM teacher and i am sure i would have NO PROBLEM with this for my mocks.. thanks a lot for this

@user-ph6jd4qu7f

3 жыл бұрын

no problem

@ik5377

2 жыл бұрын

no problem

do we have to know and memorise the compounds that make up the electrode in the batteries?

How does an organic flow battery work? For instance when quinone gets oxidized to a hydroquinone, both quinone and hydroquinone are neutral so how does an organic battery hold a charge?

Great video understood it so much better

I am confused, I thought the most negative value is the reducing agent so how is magnesium the oxidizing agent at 33:51

at 22:02 you said "reduction is lose of electrons and reducing agent gains electrons ," isn't that other way around? reduction is gain of electrons and reducing agent loses electron , is this what you meant ?

@physicsmathstutor5408

27 күн бұрын

yhhh

@user-hj4sy2md9b

26 күн бұрын

a reducing agent reduces something else by getting oxidised. this means a refusing agent does gain electrons, as it itself gets oxidised as it reduces something else. a substance that gets reduced loses electrons. if we were talking about oxidising agents, they oxidised something else and themselves get reduced. i hope that makes like a slight bit of sense😭 good luck tommorow if ur doing it

Question: As the zinc electrode loses its electrons to the voltmeter, does this cause the solution to become Zn2+, or is the solution Zn2+ prior to the Zn electrode losing its electrons and thus increasing the concentration of Zn2+ ions?

In the fuel cell how does the water from 8 get to the oxygen at 4 to make the oh- ions because the diagram doesnt show how this happens.Or is the water from somewher else?

I am having a bit of confusion with the NO PRoblem acronym, if oxidation occurs at the negative half cell, in the example at 15:24 if Zn is oxidised why would it not be the anode? Because at 23:49 if the strongest oxidising agents have the most positive values wouldn't Copper be the anode?

@ayeshaali8863

Жыл бұрын

Here is another acronym.. An Ox ( Anode oxidation) Red cat ( reduction cathode )

At 37:17, do we not multiply E value of Fe by 2 since there’s 2 lots of it ?

@Harry-es7zh

2 жыл бұрын

No- it is strange but in electrochemistry I'm sure you never multiply by the coefficient. The Value found in the electrochemical series is the same no matter how much there is

so with the fuel cells in step 5 the electrons flow to the anode and in step 7 the electrons flow away from the cathode to the anode?

thank you so much Mr Allery. You single-handedly saved my A-Level. Thank you.

@Cars.r.us2023

2 жыл бұрын

up at 2 fucking hell goodluck not falling asleep

@taiyyiba6828

2 жыл бұрын

@@Cars.r.us2023 yo how was it bro

electrons flow through the voltmeter,, but also the voltmeter is high resistance to stop current (the flow of electrons)? could someone explain this to me TT

What happens if the voltmeter is replaced with a wire and what would you observe in each half cell?

@morganjones4116

Жыл бұрын

it wouldn’t work the ions would just reach equilibrium and the whole thing would become 0V

this is such a good explanation thank you! love the acronyms too

So if commas are only added between 2 aqueous ions, what about 2 gaseous ions , would you include commas there? And when else would you include commas in the cell representation?

@Harry-es7zh

2 жыл бұрын

I think you add commas between two or more things that are the same state

@zeezee5265

2 жыл бұрын

you use commas when they're in the same phase so it can be used for liquids and gases also

when do you use an iron electrode and when do you use a platinum electrode

@igorzwolinski2785

2 жыл бұрын

Have a watch of 3:20 - 4:49 and let me know if that was helpful. Especially the end of that time frame should clear it up a tad

41:12 can someone explain how he got the overall equation on discharge ???? I dont get it ???

@zeezee5265

2 жыл бұрын

he just added both the oxidation and reduction equations together. Why Li+ doesn't appear in the overall equation is because it appears on opposite sides of the reduction and oxidation equations (Li+ is on the product side in the negative electrode and also appears on the reactants in the positive electrode) so you cancel it out. when given redox equations, if they appear on different sides, you cancel them out. But if they appear on the same side( ie both on the reactant side or both on the product side of both half equations) you add them in the overall equation I hope this helps :)

Thank you!

THANK YOU !!!!!!!!!!!!!

If we use a high resistance voltmeter, why does the current still flow from Zn electrode to Cu electrode

@UNKNOWN-jk6wv

2 ай бұрын

It's because the salt bridge connecting the two solutions allows for the flow of ions however this shouldn't be mistaken for a current. We remove the high resistance voltmeter when we want the current to flow and replace it with something like a bulb. The high resistance voltmeter in this instance can be represented by, lets get marreid.

Hey, thank you very much for your videos, they are really really helpful. The only thing is I'm a little bit confused by the use of the words positive and negative electrodes when talking about the alkaline hydrogen-oxygen fuel cell; from the point of view of current flow isn't it the other way around, isn't no.5 the posotive electrode and no.7 the negative electrode as conventional current flows in the opposite direction to electron flow? I'm probably just misunderstanding, either way your videos are super helpful, you're doing gods work ;) thanks

@SinCosTanha

3 жыл бұрын

hi have you found the answer to this? I'm confused aswell :(

@SinCosTanha

3 жыл бұрын

I know that electrons flow towards the positive because the species in no.5 are meant to be positive so it can gain electrons therefore reduce. Right?

@heritagea5340

3 жыл бұрын

nah dude you’re right, i was confused too lol

Do electrons flow from a more reactive metal to a less reactive one or from the postive electrode to the negetive electrode?

@OnTheShangriLa

Жыл бұрын

reactivity has nothing to do with it necessarily, electrons will flow from the negative to the positive electrode as electrons are negative and attracted to positive electrode. in this context electrons always flow away from the most negative electrode.

@koumara18

Жыл бұрын

IN HALF CELLS:- electrons flow from a more reactive electrode towards a less reactive electrode. so the more reactive electrode is negative and the less reactive electrode is positive (as shown by their standard electrode potential values.)

really helpful vid, thanku very much :)

@AlleryChemistry

Жыл бұрын

No problem!

I hate a level chemistry and I wish i never did it

@adailyfact

4 ай бұрын

What grade did you get?

Thanks

@AlleryChemistry

2 жыл бұрын

No problem

Thank you 🙏

@AlleryChemistry

6 ай бұрын

You’re welcome 😊

life.saver.

Thank you so much😭

@AlleryChemistry

3 жыл бұрын

No problem 😊

@UNKNOWN-jk6wv

2 ай бұрын

why are you crying to another man?.

4:25

15:45 we are crying LOL

i hate this topic and i have my a level paper 1 tomorrow help

@beauty-jc9xy

4 ай бұрын

How did chemistry go

@adailyfact

4 ай бұрын

What grade did you get.

@jieq7569

26 күн бұрын

me rn

im cooked

IMPROTNAT. Read the description as he made an error in teh video which he explains i nthe descriptuni