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=t rue&show=1000 All about circuits. Potato battery. Retrieved at http://www. allaboutcircuits. com/vol_6/chpt_3/16.html