Question

Which of the following expressions correctly represents molar conductivity?

Options

• `∧_m = K/C`

• `∧_m = (KA)/l`

• ∧_m = KV

• All of these

Answer 1

All of these

Explanation:

Conductance (G) = `(KA)/l`

Molar conductivity of a solution at a given concentration is the conductance of the volume V of solution containing one mole of electrolyte kept between two electrodes with an area of cross section A and distance of unit length.

Molar conductivity `(∧_m) = (KA)/l`

Since l = 1 and A = V (volume containing one mole of electrolyte), then ∧_m = K.V.

If the concentration is C mol/liter, then `∧_m = K/C`.