Advanced Electrochemistry

1. 1
In the name of
GOD
Advanced
Electrochemistry
1
ADELK

2. An electrochemical cell is a device that produces an electric
current

4. ELECTROLYTES
Substances that dissolve in water to yield ions are called
electrolytes.
NaCl, HNO3, HCO3, CaCl2

5. The ionization or autoionization of pure water can be
represented by the ionization equation

6. Electrolytes and Batteries

7. Electrolytes andCorrosion

8. Metallic Conduction vs ElectrolyticConduction
Metallic conduction Electrolytic conduction
Metallic conduction is carried by the
movement of electrons
Electrolytic conduction is carried by the
movement ofions
No change in the chemical properties of the
conductor
It involves the decomposition of theelectrolyte
as a result of the chemical reaction
It does not involve the transfer of any matter It involves the transfer of matter as ions
Metallic conduction decreases which increase
in temperature
Electrolytic conduction increaseswhich
increase in temperature

9. Ohm’s Law
R 
V • V = Voltage across the conductor (in Volts,V)
• I = Current through the conductor (in Amperes, A)
I • R = Resistance of the conductor (in Ohms, Ω)

10. For electrolytic solution:
Dimension: -1 m-1 OR S m-1
electric conductance (G) : G = 1/R
G=   l
Dimension: -1, mho, Siemens, S
conductivity () or spedific conductance:
Definition:  = 1/ 

11. Solution Electric Conductivity (Sm-1)
Seawater 5
Drinking water 0.0005 to 0.05
Deionized water 5.5 x 10-6