1. Electrochemistry
i.e. This is the End!

7. To help you remember which is anode and which is cathode remember: “Electrons always flow from A to C”

8. Definitions:
Electrodes: are usually metal strips/wires connected by an electrically conducting wire.
Salt Bridge: contains a solution of an inert electrolyte.
Anode: is the electrode where oxidation takes place.
Cathode: is the electrode where reduction takes place.

27. Question Sheet 1

39. Electrolytic Cell A cell where the electron source is external
Used to force a non- spontaneous Redox reaction
Anode and Cathode are connected to an external source (e.g. battery)
Electrodes are placed into Solution of the oxidizing and reducing species is in the same container
Electrolytic Cell

40. Battery
Notice that the anode is positive here and the cathode is negative.
This is an effect of using DC current

41. Comparison Electrolytic Reaction is non- spontaneous Galvanic
Requires outside energy
E- flow is from Cathode to Anode
Reaction is spontaneous
Produces energy
e- Flow is from Anode to Cathode
Comparison