Faraday's Law

[ctv1116]

What exactly is Faraday's law in terms of electrochemistry? The AAMC syllabus says we need to know "Faraday's Law relating amount of elements deposited (or gas liberated) at an electrode to current." What are they talking about? There's nothing about this in my EK book. Thanks.

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[grapeflavorsoda]

What exactly is Faraday's law in terms of electrochemistry? The AAMC syllabus says we need to know "Faraday's Law relating amount of elements deposited (or gas liberated) at an electrode to current." What are they talking about? There's nothing about this in my EK book. Thanks.

i think it is referring to the faraday's constant; 1 mole of electrons has 96484 C of charges(avogardro's number multiplied by the elementary charge).

Faraday's law is specifically referring to the physic where the change of the magnetic flux through an open(not-enclosing) surface is equal to the line integral of the electric field on the boundary(has a form similar to Green's/stoke's(if 3D) theorem in math). Basically faraday's law means that change in magnetic flux through a open enclosed circuit causes induced current. But this law is not necessary to know since they will give it out in a passage form.

 

[Mister Pie]

i think it is referring to the faraday's constant; 1 mole of electrons has 96484 C of charges(avogardro's number multiplied by the elementary charge).

Faraday's law is specifically referring to the physic where the change of the magnetic flux through an open(not-enclosing) surface is equal to the line integral of the magnetic field on the boundary(has a form similar to Green's/stoke's(if 3D) theorem in math). Basically faraday's law means that change in magnetic flux through a open enclosed circuit causes induced current. But this law is not necessary to know since they will give it out in a passage form.

I don't even think they'd put Faraday's Law on the test since it has an integral in the expression. At most, you might see an extremely watered down version where the integral has been carried out for you.

On the other hand, Lenz's Law is a much more likely topic because it can be complex conceptually (if you are uncomfortable with magnetism) and highly qualitative. Lenz's Law basically states that a current will be induced to oppose any change in magnetic flux. If you have time, I'd suggest looking it up but it'd probably appear in a passage anyway where they explain the law.

 

[vmp200]

What exactly is Faraday's law in terms of electrochemistry? The AAMC syllabus says we need to know "Faraday's Law relating amount of elements deposited (or gas liberated) at an electrode to current." What are they talking about? There's nothing about this in my EK book. Thanks.

i think this should be enough for the question u are asking.
Moles = I*t/(n*F)
I = Current in Amps or Couloumbs per Second
t = time in SECONDS
n = moles of electrons transferred, this comes from the balanced redox reactions
F = Faraday's Constant 96400 or about 100,000