Conductivity
INTRODUCTION
Electrolytic solutions are solutions that contain free ions, thus enabling them to act as electrically conductive mediums. Like typical conductors, they also obey Ohm’s Law. The current that will flow in a conductor is affected by the conductor’s resistance, according to the Ohm’s Law, V = IR. The resistance varies according to the nature and geometry of the conductor. The relationship of a material’s resistivity to its geometry is:
(1)
Where ρ is the specific resistivity in “Ω.cm”, which is dependent on the nature of the conductor, L is the conductor’s length and A is its cross-sectional area.
It is often more convenient to work with conductivity rather with resistivity. The conductivity, L, is defined as the reciprocal of resistivity, thus:
(2)
Ls is the specific conductivity of the conductor defined as the conductivity of 1 cm3 of a material, expressed in Ω-1 cm-1. The cell constant can be obtained by measuring the......
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