Resistance of 0.2M solution of an eletrolyte is 50ohm. The specific conductance of the solution is 1.4S/m. The resistance of 0.5 M solution of the same electrolyte is 280ohm. The molar conductivity of 0.5 M solution of the electrolyte in Sm2/mol is?

R1 = 50 Ὠ             R2​ =280 Ὠ ​
​k1 = 1.4 S-m-1      k2 = ?
 

=> k2 = (50/280) x 1.4 Sm-1 = 0.25 Sm-1 

λm=k2C

Molarity = 0.50 mol L-1= 0.50 mol/dm3 = 0.50/1000 mol/ m3

 λm=0.25 ×10000.50 =0.5 S m2 mol-1

 

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