from: http://www.energeticforum.com/renewa...netism-20.html
Aluminum Disk
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The battery made by Volta is credited as the first electrochemical cell. It consists of two electrodes: one disc made of zinc, the other disc of copper. The electrolyte is sulfuric acid or a brine mixture of carbon and water. The electrolyte exists in the form 2H+ and SO42−. The zinc, which is higher than both copper and hydrogen in the electrochemical series, reacts with the negatively charged sulfate (SO42−). The positively charged hydrogen ions (protons) capture electrons from the copper, forming bubbles of hydrogen gas, H2. This makes the zinc rod the negative electrode and the copper rod the positive electrode.
Aluminum Disk
Originally posted by MonsieurM
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The battery made by Volta is credited as the first electrochemical cell. It consists of two electrodes: one disc made of zinc, the other disc of copper. The electrolyte is sulfuric acid or a brine mixture of carbon and water. The electrolyte exists in the form 2H+ and SO42−. The zinc, which is higher than both copper and hydrogen in the electrochemical series, reacts with the negatively charged sulfate (SO42−). The positively charged hydrogen ions (protons) capture electrons from the copper, forming bubbles of hydrogen gas, H2. This makes the zinc rod the negative electrode and the copper rod the positive electrode.
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