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3. It is often claimed that cyclic voltammetry is one of the simplest techniques for determining whether a reaction is reversible or not. Explain how such a determination would be made. Indicate the experiments which would be performed, the quantities which would be measured and the behaviors which are indicative of reversible behavior. Consider only the simple reaction: O+neR. There are no coupled chemical reactions. (7%) 4. For a quartz capillary with the lengh of 0.25m and the diameter of 100m. The zeta potential of the wall is w=50mv. If the thickness of diffuse double layer is very small compared to the capillary radius, estimate the electro-osmotic velocity of the fluid inside the capillary. ( 8%) Applied voltage:1.0 104 volt; Electrode Spacing: 20cm; Dielectric constant of the solution: 78.4 ; Viscosity =0.01poise(1poise=0.1Pa=0.1kg/(ms))