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22 Cards in this Set
- Front
- Back
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Barriers |
Porous and Salt Bridge: allows ions to exchange |
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Electrode |
A conductor used to establish electrical contact with a non-metallic part of a circuit |
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Half-cell |
A single electrode immersed in a solution of its ions |
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Anodes |
The electrode where oxidation takes place |
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Cathode |
The electrodes where reduction takes place |
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Electrochemical Cell |
A system of electrodes and electrolytes in which either chemical rxns produce electrochem energy or an electrical current produces a chemical change Represented by: anode|cathode |
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Voltaic cell |
When the redox rxn occurs spotaneously and produces electrical energy
The moving e- mist be balanced by the movements of ions |
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Electrolytic cells |
Process in which an electric current is used to produce a redox rxn
Non-spont
Electrical energy --> Chemical
Rechargeable |
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Cell diagrams |
Anode|| cathode |
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Electrode Potential |
A measure of the electric charge density on an electrode at which redox equilibrium has been established in a half-rxn |
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Electromotive Force (EMF) AKA cell potential |
The potential difference between 2 Half-cells
Measured in Volts
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Standard Electrode Potential(E°) |
The measure of the tendency for a reduction process to occur at an electrode ( 1M and 1atm) |
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Standard Cell Potential ( E° cell) |
The potential difference or voltage of a cell formed from 2 standard electrodes |
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Pos E°cell |
Indicates voltaic Cell which is spont |
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Neg E°cell |
Indicates an electrolytic cell which is non spont |
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Battery |
Device that stores chemical energy for a later release as electrical energy 3 types: primary, secondary and fuel cells |
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Primary Battery |
Not reversible Dry cell batteries Alkaline battery- NH4 is replaced with NaOH + KOH
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Secondary battery |
Reversible, can be recharged and reused Both voltaic and electrolytic Cells Ex Li ion batteries |
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Fuel Cells |
Material (reactants, etc) pass through the battery
Converts chem energy of the furl directly to electricity |
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Corrosion |
Is a voltaic rxn
Galvanized metals
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Electrolysis |
Decomposition of a compound using electricity |
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Electroplating |
One metal is plated onto another using electrolysis |
