https://youtube.com/playlist?list=PLSH4WOwvkQzwLl-G5CGJZAIsofkp4wrc0
Video Includes: Oxidation numbers, oxidation-reduction, what is oxidized and reduced, galvanic (voltaic) cells, standard cell potential, voltage, E cell, electrolytic cell, drawing, Molten salt, Electrolysis of water, Gibbs Free Energy, potentials, standard hydrogen electrode, and a crash course on electrochemistry.
Videos provided by CrashCourse, Mike Sugiyama Jones, The Organic Chemistry Tutor, Tony Hussey, Conquer Chemistry, Richard Thornley, Rachel Johnson, Professor Dave Explains.
Ox An Red Cat
Oxidation at the Anode
Reduction at the Cathode
S.H.E. is standard hydrogen electrode (2H+ + 2e- → H2)
Gibbs free energy = - n * F * E Cell
n = moles of e-
F = 96485C / mole e-
E Cell = cell potential
Galvanic cell | Electrolytic cell |
|---|
Spontaneous | Non spontaneous |
G < 0 | G > 0 |
E Cell > 0 | E Cell < 0 |
Thermodynamically favorable | Thermodynamically unfavorable |
Positive ions leave the anode (-) and electrons travel to the cathode (+). | Positive ions flow to cathode (-). |
Anions flow to anode. | External power source |
Chemical energy → electrical energy | Electrical energy → chemical energy |
Electrons always flow anode to cathode.
Charge = A*S
A = Current
S = Time in seconds
The Electrolysis of water
2H2O → 2H2 + O2
H+ goes to cathode to be reduced
Cathode: 2H+ + 2e- → H2
Anode: 2O2 → 2e- + O2
H2SO4 is added as a catalyst
Example of factor labeling:
# Minutes | 60 Seconds | # Amps | C | 1 mole e- | # mole element | molar mass g |
|---|
| 1 Minute | | A * S | 96485 C | # mole e- | 1 mole |
Knowt
