Transcription of Electrochemistry
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Electrochemistry
ElectrochemistryChemical reactions at an electrode, galvanic and electrolytic cellsA Chem1 Reference TextStephen K. Lower Simon Fraser University1 Table of contents1:Chemistry and electricity .. 3 Electroneutrality .. 3 Potential differences at interfaces .. 52:Electrochemical cells .. 6 Transport of charge within the cell .. 7 Cell description conventions .. 8 Electrodes and electrode reactions .. 8 Standard half-cell potentials .. 9 Reference electrodes .. 113:Prediction and significance of cell potentials .. 12 Cell potentials and the electromotive series .. 13 Cell potentials and free energy .. 134:The Nernst equation.
themselves to the electrode surface— normally only a few atomic diameters. Thus a very small voltage can produce a very large potential gradient. For example, a potential differ-ence of one volt across a typical 10–8 cm interfacial boundary amounts to a potential gradi-ent of 100 million volts per centimeter— a very significant value indeed!
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