When the solution of weak electrolyte is diluted, the volume of the solution increases, hence equivalent conductivity (λc) increases. However, during this process, the number of current carrying particles per cm3 decreases.

What happens when weak electrolyte is diluted?

For a weak electrolyte molar conductance in dilute solution increases sharply as its concentration in solution is decreased.

What happens to the electrical conductivity of weak electrolyte with dilution?

For weak electrolytes (i.e. incompletely dissociated electrolytes), however, the molar conductivity strongly depends on concentration: The more dilute a solution, the greater its molar conductivity, due to increased ionic dissociation.