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20 Cards in this Set

  • Front
  • Back
Redox Reaction
A reaction which involves the transfer of electrons in oxidation and reduction reactions.

Oxidation - loses e-
Oxidizing agent - gains e-
Reduction - gain e-
Reducing agent - loses e-
Electrochemical cell
A device which consists of two electronic conductors dipping into an electrolyte solution or solid
Half reactions
Either the oxidation or reduction reactions of a redox reaction showing the transfer of electrons
Electrode
Electronic conductor and its surrounding electrolyte
Salt Bridge
Electrolyte solution which completes the circuit
Liquid Junction
Two solutions in direct contact with one another between a porous membrane which forms the liquid junction
Galvanic cell
Cell that produces electricity due to a spontaneous reaction inside
Electrolyte cell
A cell where a non spontaneous reaction is driven by a external source
Fuel cell
Galvanic cell which CH4, O2, H2 are continuously sourced from outside the cell
Anode
Cathode
Loses electrons (oxidation)
Gains electrons (reduction)
Zero Current potential
Potential difference when an electrochemical cell is balanced against an external source of potential
Half life
Time required to convert one half of the reactants into products
Daniel Cell
A cell consisting of a zinc electrode immersed in a
solution of zinc ions, connected to a solution of copper ions in which a copper electrode is immersed.
Zinc is more reactive that copper so is oxidized and has a more negative potential
Common redox reactions
Combustion, respiration, photosynthesis and corrosion

ESSENTIAL ALSO FOR COENZYMES (FAD, NAD, NADH etc)
Electrochemistry
Uses electrical measurements to quantify oxidation and reduction reactions
When describing a half cell or electrochemical cell what definitions would you use
Anode, cathode, electrode, electrochemical cell, redox reaction etc
Electrode types
Metal electrode
Gas electrode
Insoluble salt electrode
Redox electrode
How do you calculate the zero current potential of a cell?
Difference between the right hand and left hand electrode
rE - lE

Left hand cell loses electrons
What is the Nernst Equation?
E = E° − (RT/νF) lnQ

Can be used to calculate half cell potential
Left Hand cell...
Loses electrons
strong oxidizing agent