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Consider the cementation of copper on iron according to the displacement reaction which can be used to recover copper from dilute liquors cu2+ fe- cu +fe2+. draw the current potential curves for the cathodic and anodic half cell reactions explain what you understand by the mixed potential measured using an iron rod immersed in a copper sulfate solution during cementation and how it relates to the rate of the cementation reactionn information from a rotating disc experiment for copper cementation is provided below calculate the diffusivity of cu ions and comment on the rate-controlling step. (see lecture slides) (b) (c) j = | (012 )c-kc (levich equation) 0.62d23 1/6 d-diffusivity (diffusion coefficient) ω-rotation rate-1000 rpm (revolutions per minute; i rpm-2 π /60 s-1) v-kinematic viscosity -9 x 107m2 s1 k-apparent mass transfer coefficient = 9.9 x 10-3 cm s d= disc diameter, (disc area 0.2 cm2) area of a disk = (nd-)/4
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Consider the cementation of copper on iron according to the displacement reaction which can be used...
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