Term
| Oxidation-Reduction Reaction (Redox Reaction) |
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Definition
| Electrons are transferred from one atom to another. |
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Term
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Definition
An atom that loses an electron
Λ H+
Λ O
V Electron |
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Term
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Definition
Atom gains an electron
Λ electrons
V H+
V O |
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Term
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Definition
| The possible charge values that an atom may hold within a molecule. |
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Term
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Definition
0 : Atoms in elemental form
-1: Flourine
+1: Hydrogen (except when bonded to a metal when it is -1)
-2: Oxygen (Except when peroxide)
+1: Group 1
+2: Group 2
-3: Group 15
-2: Group 16
-1: Group 17 (Halogens)
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Term
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Definition
| Gives the electron to an atom and is oxidized. |
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Term
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Definition
| Atom that is received the electron and be reduced. |
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Term
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Definition
| Charge transfer resulting from a redox reaction |
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Term
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Definition
| One component of a redox reaction |
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Term
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Definition
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Term
| Galvonic Cell (Voltaic Cell) |
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Definition
| Uses the electric potential between phases in a redox reaction to generate a current of electrons from one phase to another in a conversion of chemical energy to electrical energy. |
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Term
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Definition
Ionic conducting phase of a Galvonic Cell.
Impermeable to electrons. |
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Term
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Definition
| Electron Conductors such as metal wires. |
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Term
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Definition
Electronic conductors of a galvonic cell.
Cathode and Anode. |
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Term
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Definition
Marked with a negative sign.
Oxidation half reaction occurs here. |
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Term
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Definition
Marked with a positive sign.
Location of the reduction half reaction. |
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Term
| Cell potential, E (Electromotive force) |
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Definition
| The potential difference between the terminals when they are not connected. |
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Term
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Definition
ΔG=-nFEmax
n=moles
F = Faraday's Constant (96,486 C mol-1)
E = voltage
-ΔG = work done by system, not on the system
+ΔG = work done on the system |
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Term
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Definition
ΔG=ΔGO+RTln(Q)
Q=reaction quotient
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Term
| Free Energy at Equilibrium |
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Definition
ΔGO=-RTln(K)
If K=1, ΔGO=0
If K > 1, ΔGO<0
If K<1, ΔGO>0
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Term
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Definition
A limited form of a galvonic cell with a reduction half reaction taking place in one half cell and the exact reverse of that half reaction taking place in the other half of the cell.
Never at standard conditions, so the Nernst equation is needed to solve for the cell potential. |
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Term
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Definition
A galvonic cell with the power hooked up forcing the cell to run backwards.
Negative emf.
cathode is negative, anode is positive.
reduction still occurs on cathode and oxidation on anode.
used for metal plating and purifying.
plating occurs on the cathode. |
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Term
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Definition
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Term
| Positive reduction potential |
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Definition
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Term
| Negative Reduction potential |
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Definition
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