Exam 4 rachel review - 1. Electrochemistry review...

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1. Electrochemistry review [oxidation, reduction. Anode, cathode, voltaic cell, electrolytic cell, get standard potential] 2. Nernst equation, for non standard conditions Standard conditions: 1 M, 1 atm or 1 bar. E = E standard – RT/nf * lnQ E = E standard - .05916/n log Q … at 25 degrees C Figure out ox/red reactions Write overall reactions Q = [products]/[reactants] Can use concentration 3. Plating/current Plating, deposition (deposition) M n+ + ne- M 0 (s) [this is being plated] I*t / n*F = mol stuff [what u are plating] I in amps = coloumbs/second n = electrons 4. Batteries – general Voltaic cells Primary not reversible (not rechargeable) ex. alkaline Secondary reversible (ex. Nickle cad, NiMH, Li-Ion, Pb-storage) Fuel cells 5. Car battery – -acid (secondary) Upon discharge – voltaic cell. Ox: Pb(s) + SO 4 2- PbSO 4 (s) + 2e- Red: PbO2(s) + 4H+ + SO 4 2- + 2e- PbSO4 + H2O Upon charge (recharge) – electrolytic cell
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Ox red Red ox 6. Rate of reaction – overall Delta [] / delta t = overall rate of reaction
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This note was uploaded on 07/12/2011 for the course GOV 365L taught by Professor Liu during the Spring '08 term at University of Texas at Austin.

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Exam 4 rachel review - 1. Electrochemistry review...

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