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Electrochemistry

Electrochemistry - standard electrodes E°cell=E°(right...

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Electrochemistry Chemical—Electrical Galvanic (voltaic) is for spontaneous and electrolytic is for nonspontaneous Battery-electrochemical cells, or a properly connected combo of 2 half cells and a salt bridge Zinc has higher tendency to give up electrons than copper Anode and oxidation Cathode and reduction Electrolytic cell requires external source of energy Cell voltage is also called electromotive force and potential difference. The bigger it is, the greater the driving force Standard electrode potential, E °, measures tendency for a reduction process to occur at an electrode Standard cell potential, E°cell, is potential difference between two
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Unformatted text preview: standard electrodes. E°cell=E°(right cathode) - E°(left anode) • Standard Hydrogen Electrode- equilibrium established on surface of inert metal (Pt) between H30+ ions and H2 molecules at 1 bar. Potential is taken to be zero. • ΔG=-zFE° • It E°cell is positive, it is a working cell • Cell Notation: Electrode (Anode)/species in solution ‖ species/Electrode (Cathode) • Battery- a self-contained group of voltaic cells arranged in a series (+to -) so that their individual voltages are added up • Primary- they cannot be recharged, alkanine, mercury, • Secondary-can be recharged to reverse reaction •...
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