Electrochemistry - PowerPoint PPT Presentation

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Electrochemistry

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  1. Electrochemistry

  2. What is electrochemistry? • Electro: • Electricity • Chemistry: • Science that studies changes in matter • Electrochemistry: • Using chemical reactions to generate electricity

  3. The Potato Battery • An electrochemistry example • Able to generate a maximum of 0.8 V of electricity • The electrons travel from the copper wire to the zinc coated nail - 0.8 +

  4. Problem: LCD clocks require a 1.5 V battery • How could we generate more electricity? • Connect multiple potatoes together! • Two types of circuits: • Parallel • Series

  5. In Parallel • All positive terminals are connected together and all negative terminals are connected together. • Increases amperage, not voltage

  6. In Series • Every positive terminal is connected to a different negative terminal. • Increases voltage, not amperage

  7. LCD clocks need 1.5 V of electricity • One potato battery generates 0.8 V of electricity • How should we make our potato clock?

  8. Photo Credits Electrochemical Cell. Retrieved at http://sphs.spusd.net/apps/classes /show_assignment.jsp?classREC_ID=180029&start=0&pff=1&showAll=true&show=1000 All about circuits. Potato battery. Retrieved at http://www. allaboutcircuits. com/vol_6/chpt_3/16.html