Please explain variation of conductivity and molar conductivity with concentration.
Asked by shrikrushna deokar | 8th Nov, 2013, 04:35: PM
Conductivity of a solution is equal to the conductance of a solution of 1cm length and cross section area of 1 square cm. It is represented by symbol Kappa (K ).
K = 1/ ?
Where, ? = resistivity.
The unit of K is ohm-1 cm-1 or S cm-1
It depends on the concentration of the electrolyte, nature of solvent and temperature.
Molar conductivity of a solution is the conductance of the volume V of solution containing one mole of electrolyte placed between two electrodes with an area of cross section A and distance of unit length.
?m = K /c
Where, k =conductivity and c= electrolyte concentration.
It increases with the decrease in concentration.
Answered by Karishma Kapoor | 11th Nov, 2013, 11:03: AM
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