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

How to use a table of standard reduction potentials to calculate standard cell potential. Identifying trends in oxidizing and reducing agent strength.

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[NinjaMartin]

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

[sergejfehrlich]

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

[Textbook]

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

[KarteHainKucch]

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

[Desertsnake]

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.

[betha.ostrander]

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. :(

[aemonzhou]

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

[gurusaran]

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

[judyajowers]

Who is the lecturer? He is a fabulous teacher!

[dalsenov]

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

[MFarizanCover]

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

[jmmifsud]

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

[heartlytepai]

Good 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 you

[RobRuffMusic]

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

[peppeppermintangel]

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

[kimvangvideomarketerbangko]

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

[tanjapejic]

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

[sahil]

How to know that the product is favourable or not ?

[Kencan]

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?

[hannahalexis]

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