Molar conductivity:

Problem:

Describes molar conductivity and equivalent conductivity of an electrolyte. How are they related to each other?

Answer:

Molar conductivity: It is the conductivity for unit molar concentration of a dissolved electrolyte.

Λm = κ/ c =  κ/(M ×1000)S m² mol ^-1  = (1000 κ/M) S cm ² mol ^-1

Equivalent Conductivity: that is the conductivity of 1 g equivalent of an electrolyte when present in V cm³ of solution

Λ_eq = κV

If c is the concentration of the solution in g equivalent per dm³, after that

Λ_eq = 1000 κ/c

Its unit is S cm² eq^-1

Relationship

Λ_eq = Molar Conductivity (S cm2 mol^-1)/ n

where n = charge unit