Batteries Quizizz lesson

​What is a galvanic cell?

​A device where a chemical reaction occurs that produces electricity

​

• ​Batteries are galvanic cells

• ​Conversion of chemical energy into electrical energy

• Uses redox reactions because of the movement of electrons

  • the electrons flow through a set up wire and generate a current/electricity

​Parts of a Galvanic Cell

• ​Electrodes

  • Cathode - where reduction occurs

  • Anode ​- where oxidation occurs

• Solutions

  • an electrolyte solution that can conduct electricity

• Salt bridge

  • provides electric​al contact between the two solutions and completes the circuit

  • keeps charge balance

​How does a galvanic cell work?

• Metal electrodes are placed in their respective electrolyte solutions

• ​The redox reactions begin

• In this example:

  • The zinc anode is where oxidation occurs - zinc enters the solution from the electrode - loss

  • The copper cathode is where reduction occurs - copper attaches to the electrode from the solution - gain

• Electrons flow between two half cells, from negative terminal to positive terminal

• The salt bridge completes the circuit