Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.

Explanation

Conductivity of a slution is defined as the conductance of a solution of 1 cm length and having 1 sq. cm as the area of cross-section
Molar conductivity of a solution a dilution (V) is the conductance of all the ions produced from one mole of the electrolyte dissolved n V `cm^(3)` of the solution when the electrodes are one cm apart and the the area of cross-section of the electrodes is so large that the whole of the solution is contained between them. it is usually represented by `^^_(m)`. The conductivity of a solution (both for strong and weak electrolytes) decreases with decreases in concentration of the electrolyte. i.e., on dilution this is due to the decrease in the number of ions per unit volume of the solution on dilution the molar conductivity of a solution increases with decrease in concentration of the electrolyte. this is because both number of ions as well as mobility of ions increases with dilution when concentration approaches zero, the molar conductivity is known as limiting molar conductivity.