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Text from PDF Page: 001Standard Electrodes An electrode by definition is a point where current enters and leaves the electrolyte. When the current leaves the electrodes it is known as the cathode and when the current enters it is known as the anode. Electrodes are vital components of electrochemical cells. They transport produced electrons from one half-cell to another, which produce an electrical charge. This charge is based off a standard electrode system (SHE). SHE is recognized at a charge of 0 volts and serves as a medium for any cell potentialcalculation. Electrodes 1. What are the mechanics of an electrode? 1.1.1. What processes are going on? 1.1.2. What is an electrode made of? 2. Examples of Electrodes 3. Standard Hydrogen Electrode 3.1.1. What is a SHE made of? 3.1.2. What is going on in this process? 4. Three Electrode System 5. References 6. Outside Links 7. Problems 8. Contributors What are the mechanics of an electrode? What processes are going on? An electrode is a metal whose surface serves as the location where oxidation-reduction equilibrium is established between the metal and what is in the solution. The electrode can either be an anode or a cathode. An anode receives current or electrons from the electrolyte mixture, thus becoming oxidized. When the atoms or molecules get close enough to the surface of the electrode, the solution in which the electrode is placed into, donates electrons. This causes the atoms/molecules to become positive ions. The opposite occurs with the cathode. Here the electrons are released from the electrode and the solution around it is reduced.
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