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Electrochemistry-(part-1)

The study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations is known as electrochemistry.

Jan 17, 2013 10:04 IST
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Electrochemistry (part-1)
Electrochemistry (part-1)

what is electrochemistry? What is electrochemical cell? What is definition of galvanic cell? How emf get generated between two electrodes? This video will help you understand the concepts of electrochemistry

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Electrochemical cells are of two types. Spontaneous reactions occur in galvanic (voltaic) cells but nonspontaneous reactions occur in electrolytic cells. Both types of cells contain electrodes where the oxidation and reduction reactions occur. Oxidation occurs at the electrode termed the anode and reduction occurs at the electrode called the cathode. The anode of an electrolytic cell is positive and cathode is negative. Anode attracts anions from the solution, So the anode of a galvanic cell is negatively charged, since the spontaneous oxidation at the anode is the source of the cell's electrons or negative charge. The cathode of a galvanic cell is its positive terminal. In both galvanic and electrolytic cells, oxidation takes place at the anode and electrons flow from the anode to the cathode.

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