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Unformatted text preview: iR drop of cell iR drop of cell Electrolytic 1V Galvanic Electrolytic Galvanic E to counter
E galvanic overpotential 1V Apply a value with the goal of reaching the ‘final’ concentration [Cu2+]electrode [Cu2+]bulk For our example, lets assume that
= 10-2 M
[Cu2+]electrode = 10-4 M
Ebulk = 0.337 + 0.0592
2 log(10-2) = 0.278 Eelectrode = 0.337 + 0.0592
2 log(10-4) = 0.219 !conc = Eelectrode - Ebulk = -0.059V Concentration overpotential can never be
eliminated. However, it can be reduced.
Use efficient stirring
Use a low current density
Low current - slower reaction
Large electrode - more area for reaction. ...
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This note was uploaded on 01/07/2012 for the course CHEM 290 taught by Professor Harvey during the Fall '08 term at SUNY Stony Brook.
- Fall '08