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    1. Guangdong Liandong New Energy Co., Ltd. focuses on R&D and production of new energy batteries

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      Times:07/25/2014    Hits:1103
               Positive electrode: copper in a copper sulfate solution is inserted (the formation of Cu2 + / Cu redox pair), 
       
              Anode: zinc rod inserted in zinc sulfate solution (formation of Zn2 + / Zn redox) 
              Salt bridge between the two solution (saturated solution of potassium chloride) is connected with the connection between the copper and zinc wire rod, which constitutes the primary battery. 
              So the electron will from the negative flow positive, you have to ask is why the electronic to the directional flow. Did not know the concept you learned standard electrode potential is not, this value can be experimentally measured, because the elemental zinc and zinc ions formed oxidation standard electrode potential redox ratio of elemental copper and copper ions constituting the reduction potential of the standard electrode potential smaller the negative value (a predetermined standard hydrogen electrode, the electrode potential is 0), and copper electrode is a positive value, so when using the when the wire connecting the two electrodes, the potential difference between two electrodes exist, the flow of negative electrons from the negative electrode, a positive electrode and the direction of current flow is negative, the direction opposite to the electron flow, as we often say to water with the flow, the height difference is due to the presence (topography difference) between the high-and low-lying terrain, is a spontaneous process. 
              Using a standard electrode potential may also know that the metal lively, electrode potential is smaller then the elemental metal reactivity is stronger, we go to school in chemistry class too, metals have a sequence of activities table: potassium, calcium, sodium, magnesium, aluminum, zinc , iron, tin, lead, hydrogen, copper, mercury, silver, platinum, gold; this table is based on the value of the standard electrode potential to arrange out, we can see from this table in metal elemental hydrogen before the hydrogen may be from the solution which replaced it, just said the required standard hydrogen electrode, the electrode potential is 0, so the oxidation of metallic hydrogen before their cations restore electricity standard electrode potential pair is less than 0, and the metal after the hydrogen is its standard electrode potential is greater than 0.
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