Fe Fe

1. VOLTAIC CELL File 319 SLIDE ONE OVERVIEW ANIMATION 2e- 2e- VOLTMETER 2e- 2e- Na+ SO42- Na+ SO42- SO42- Na+ Na+ 2e- Fe Fe Pb 2e- - Fe2+ Pb2+ Pb Na+ Na+ SO42- + - Pb2+ Pb - + - + Fe0(s) 2e- + Fe2+ 2e- + Pb2+ Pb0(s) ANODE (ANOX) CATHODE (REDCAT)

2. VOLTAIC CELL SLIDE TWO THE ANODE AS THE Fe(S) IS OXIDIZED, IT DISSOLVES AND THE ANODE LOSES MASSAND 2e- ARE RELEASED AS THE Fe(S) IS OXIDIZED, IT DISSOLVES AND THE ANODE LOSES MASS, THE IRON(II) IONS WILL MAKE THE ANODE SOLUTION POSITIVE, THEREFORE THE NEGATIVE SALT BRIDGE ION MOVES IN TO NEGATE THE + CHARGE VOLTMETER Na+ SO42- Na+ SO42- SO42- Na+ Na+ 2e- Fe Fe Pb Fe2+ NSBTA Negative salt bridge to anode Never sell booze to adolescents! SO42- Pb2+ Pb Fe0(s) 2e- + Fe2+ 2e- + Pb2+ Pb0(s) ANODE (ANOX) CATHODE (REDCAT)

3. VOLTAIC CELL SLIDE THREE e- FLOW 2e- 2e- VOLTMETER 2e- 2e- ELECTRONS ALWAYS MOVE FROM ANODE TO CATHODE (FATCAT). THE ELECTRONS BUILD UP IN THE ANODE MAKING IT NEGATIVE, TRAVEL TO THE CATHODE WHERE A METAL ION GAINS THEM IN REDUCTION, THE CATHODE IS POSITIVE. VOLTMETER ALWAYS POINTS TO CATHODE, Na+ SO42- Na+ SO42- Na+ Na+ 2e- Fe Fe Pb 2e- Fe2+ SO42- Pb2+ Pb Fe0(s) 2e- + Fe2+ 2e- + Pb2+ Pb0(s) ANODE (ANOX) CATHODE (REDCAT)

4. VOLTAIC CELL SLIDE FOUR THE CATHODE 2e- 2e- VOLTMETER 2e- THE POSITIVE SALT ION MIGRATES TO THE CATHODE TO REPLACE + CHARGE LOST AS Pb(II) ARE REDUCED TO Pb SOLID. 2e- THE SOLID LEAD BONDS (METALLIC BONDING) THE CATHODE WHICH GAINS MASS. THIS IS ELECTROPLATING. Na+ SO42- Na+ SO42- SO42- Na+ Na+ 2e- Fe Fe Pb 2e- Fe2+ Pb2+ Pb Na+ Na+ SO42- AS ELECTRONS ARE GAINED BY Pb(II) IONS FROM THE CATHODE, THE IONS BECOME REDUCED INTO Pb(S) Pb2+ Pb Fe0(s) 2e- + Fe2+ 2e- + Pb2+ Pb0(s) ANODE (ANOX) CATHODE (REDCAT)