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EXPERIMENT 5. CYCLIC VOLTAMMETRY - Chemistry

-1- EXPERIMENT 5. CYCLIC VOLTAMMETRYO bjectives1. To determine the capacitance of electrochemical To determine the formal potential and diffusion coefficient of Fe(CN) To use CYCLIC VOLTAMMETRY to understand the electrochemistry of Co(NH3)63+.4. To investigate the effects of electrode contamination on CYCLIC Reactions and Electrode CapacitanceFigure 1 describes the process that occurs in simpleelectrode reactions. In the case of reduction, a species (O)capable of receiving an electron from the electrode diffusesto the surface, receives an electron and diffuses away fromthe surface.

area, D is the diffusion coefficient of the species, v is the scan rate and C* is the bulk concentration of the species. The difference between E p and the point where current is half that at E p, E p/2, is 56.5/n mV at 25 °C, where n is the number of electrons transferred. Note that for a Nernstian system, E p should be independent of scan ...

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  Diffusion, Cyclic, Cyclic voltammetry, Voltammetry

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