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ELECTROCHEMISTRY

ELECTROCHEMISTRY. The study of the interchange of chemical and electrical energy http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/electroChem/voltaicCell20.html. OIL RIG. o xidation i s l oss, r eduction i s g ain (of electrons)

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ELECTROCHEMISTRY

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  1. ELECTROCHEMISTRY The study of the interchange of chemical and electrical energy http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/electroChem/voltaicCell20.html

  2. OIL RIG oxidation is loss, reduction is gain (of electrons) Oxidation--the loss of electrons; increase in charge Reduction-- the gain of electrons; reduction of charge

  3. Galvanic (voltaic cells) spontaneous chemical reactions (battery) Electrolytic cells non-spontaneous and require external e-source (DC power source) Two types of processes

  4. Parts of the voltaic cell Anode- AnOx the electrode where oxidation occurs After a period of time, the anode may appear to become smaller as it falls into solution. Cathode- RedCat the electrode where reduction occurs After a period of time it may appear larger, due to ions from solution plating onto it. Ca+hode is always positive in galvanic cell.

  5. Salt Bridge A device used to maintain electrical neutrality (balance the charge) in a galvanic cell. This may be filled with agar which contains a neutral salt or it may be replaced with a porous cup.Salt is often KNO3 because it will not form a precipitate.

  6. Electron Flow always from anode to cathode (through the wire) FATCAT From the Anode To the CAThode

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