ELECTROCHEMISTRY Flashcards
(14 cards)
is the study of chemical processes that cause electrons to move
Electrochemistry
is a reaction that involves a change in oxidation state of one or more elements.
REDOX reactiom
is a reaction that involves a change in oxidation state of one or more elements.
REDOX reactiom
substance loses an electron, its
oxidation state increases
Oxidized
substance gains an electron, its oxidation state decreases
Reduced
Two types of ELECTROCHEMICAL CELLS
- Electrolytic
- Voltaic (Galvanic Cells)
Electrochemical cell that is being pushed toward the non-spontaneous direction by electrolysis. It uses electrical energy to produce chemical change
Electrolytic cell
are electrochemical cells that contain a spontaneous reaction, and always have a positive voltage. The electrical energy released during the reaction can be used to do work.
Voltaic (Galvanic) cell
The decomposition of a substance by means of electric current. This method pushes a redox reaction toward the non-spontaneous side.
Electrolysis
The half-cell where oxidation occurs is called the
anode
The other half-cell, where reduction occurs, is called
cathode
A voltaic cell consists of two compartments
Half cells
The half-cell where oxidation occurs is called the
anode
is a shorthand notation to represent the redox reactions of an electrical cell.
Cell diagram
