Standard reduction potentials | Redox reactions and electrochemistry | Chemistry | Khan Academy

[@NinjaMartin]

Oh my, what a glorious lecture. Thank you so much. You’re changing the world to the better here, Khan Academy!

[@sergejfehrlich6719]

It wasn't in my native language but still better than two blocks with my chemistry teacher...

[@Textbook000]

Ecell = Ered + Eox Or Ecell=Ered (cathode} - Ered(anode) Both equations are the same

[@andyoohhh2061]

How are these the same? The sign change would give you a different value. What am I missing?

[@techyes4874]

@@andyoohhh2061 without changing the sign it still is the same with the mentioned equation above: 0.34 V - (-0.76 V) = 1.10 V

[@KarteHainKucch]

@@andyoohhh2061 concept

[@priyanshsuthar519]

Former will be more positive and latter be less negative.

[@iammoonjooyoung]

Better than my professor

[@simpleaverage9772]

some of them are not even professors they are a waste of time and they should give up

[@Desertsnake15]

If you're still having trouble understanding redox agents think of them as being counter current: Oxidizing agent -> is Reduced through causing the other to give up their electron. Reducing agent -> is oxidized through causing the other to gain the electron they gave up.

[@TheAllBloods]

OIL RIG! Oxidation Is Losing electrons, Reducing Is Gaining electrons.

[@aizasaed170]

Tim Dean crash course😉

[@KarteHainKucch]

well, you are becoming clear in concepts like sal used to do

[@judyajowers]

Who is the lecturer? He is a fabulous teacher!

[@betha.ostrander4127]

My professor said the numbers should always be subtracted as the formula is reduction minus oxidation ... that numbers should be left as is with values regardless of if they are reduced or not. You just have to know where to put what and now I'm totally confused. Just looked over all his notes to make sure and it's written as this and in the book as well. :(

[@YNJ71]

mine said the same thing! I'm so confused, in my textbooks and on the internet every example shows reduction + oxidation but my lecturer said it's reduction - oxidation :/ and i have my exam soon

[@rebecav100]

You're both correct! The usual equation is Reduction - Oxidation, with the normal values from the table. The second equation (Reduction + Oxidation) is a result of FLIPPING the sign of your oxidation half reaction. For example, if your reaction involves Fe being reduced (E= -.44V) and Li being oxidized (E= -3.05V), then the first equation involves using the values directly from the table. So, it will look like this: (-0.44)-(-03.05)= 2.61V. The second equation involves flipping the sign of the oxidation value, because the chemical equation itself is flipped around. So, the second equation looks like this: (-0.44)+(+3.05)=2.61V. Both methods give you the same answer, it just depends on if you remember to change the sign for Eox.

[@YNJ71]

Rebeca Volosen thank you!!

[@turkishemir5735]

Rebeca Volosen You are my Hero!

[@nedisawegoyogya]

come here, for the same reason lol

[@MFarizanCover]

this very2 helped me in my STPM chemistry , thank you so much , may god bless you

[@jerichoscott4819]

S

[@aemonzhou2505]

Very precise terms used to describe the concepts here. Well done.

[@gurusaran7193]

So Simple yet delivered what was needed in a fabulous way Thank you

[@dalsenov]

Excellent video! Thank you! Now one understands why batteries use lithium.

[@abhishekrai4325]

Brilliant explanation !

[@jmmifsud1]

Wow - this is so clear. my high school textbook took 3 pages to do this and managed to completely confuse me. Yep there are some pathetic authors out there and most of these are professors. Goes to show you, more academic = hopeless at teaching

[@vamanamurthy22]

excellent .....too helpful ....

[@heartlytepai9475]

Good explanation................thank you for this video. Just one question regarding the reverse part, my lecture told us that whenever you reverse any half Redox reaction equation the sign remains the same, however when you reverse the oxidation half reaction for Zn you change the sign, so I'm really confused now, can you clarify that for me please???............Thank you

[@ahmedhaleem6519]

I know that you pby have graduated but imma explain one thing for everyone who might be triggered by what your prof said .. He is wrong, The reason is : How do you reverse an equation ? actually you just multiple the whole equation by (-1), the equation here means both the Reactants and the Products, AND ALSO the potential. So yes, whenever you reverse the half reaction equation you need to change the sign.

[@RobRuffMusic]

So the higher or more positive the number on the right... Means it requires less voltage to ruduce?

[@gdrivx]

Very well explained.

[@bhaveshohal3390]

Khan- The Savior

[@jahmaxranyeta8703]

I love this chemistry lesson

[@kimjong-un4521]

Thank you

[@jaydipsarkar3395]

Is SRP table made experimentally?

[@freddyfreeman5588]

great videos, thank you!

[@thatomofolo452]

Hello 👋 Khan Sir

[@peppeppermintangel]

The higher the reduction potential, the more likely it is for the substance to be reduced

[@bokicaa321]

This was helpfulllll a lot thank you!

[@shaikrafiq9498]

Will you please make a vedio on standard hydrogen electrode?

[@sandyxbhatti]

I LOVE THIS.

[@mohamedhadod2467]

Is that correct 2:43 to 2:50

[@preciousmwenda]

E=E°cathod-E°anod Can this work?

[@sahil3120]

How to know that the product is favourable or not ?

[@tanjapejic7273]

if you have to multiply one of the half reactions.. would you then multiply its' cell potential???

[@transformersrepublic5878]

No because the unit of E is Volts not Volts per mole

[@kimvangvideomarketerbangko3265]

How does this relate to the octet-rule? I feel like there's a connection

[@kimvangvideomarketerbangko3265]

@Biochemistry Forever That wasn't sarcasm :p

[@EmmyKhan]

Why isn't there a standard oxidation potential table?

[@IndieKanya]

are there copper-lithium batteries??

[@hannahalexis6741]

the half equation higher up the standard potentials table must always be reversed and written as an oxidation. so I don't see why you wrote the copper as a reduction and the zinc equation as an oxidation

[@ahlam9276]

everyone tell us whats your studying Im a chemistry major student year 3

[@aizasaed170]

Ahlam Moo mcat

[@jake_riptide]

Chem 12, got a test tomorrow

[@AS-zr6iw]

10 grade AP chem

[@lyubomirgizdarski8191]

Biochemistry

[@حسينعبدالله-ش7ل]

I'm a student in pharmaceutical

[@Kencan254]

The formula for calculation of Standard Reduction Potential give at 5.05 is wrong. All Chemistry textbooks I have counter checked this with shows that the correct formula as: e = e (+ve) - e(-ve). See for example Chang Raymond on page 844 (10th edition) uses the formula given above. Khan Academy, can you please comment?

[@dejanhaskovic5204]

Mwongera Mwarania Minus and minus give plus.

[@DevPatel-nf5mp]

It's same only

[@PranavKarthik-z1j]

Logical explanation for the formula.

[@divyav]

Is it same as standard Electrode potential?

[@vicneshwaranair1482]

yeah

[@zungnguyen5300]

the audio is quiet

[@anuverma6962]

why you add cathode and anode

[@rubehuyghe302]

🙏🙏🙏

[@nasreenhedayet2211]

I love chemistry, do you?

[@anjalirajraj807]

Like ur video

[@curtpiazza1688]

👍

[@nasreenhedayet2211]

Hi, I am a cambridge A level chemistry student!

[@Vaishnavi-ot6br]

I doubt it..

[@hasbiyanousheen4432]

Nasreen Hedayet so what

[@snowecaddel9454]

@@Vaishnavi-ot6brokay, but students there exist though right? What are the chances. No need to doubt 🫶