Question

Discuss the variation of molar conductivity with concentration for acetic acid and Kcl?​

Answer 1

➨Molar conductivity increases with decrease in concentration as the total volume, V, of a solution containing one mole of electrolyte also increases. Upon dilution, the concentration decreases. Variation of molar conductivity with concentration is different for strong and weak electrolytes.

Answer 2

Answer:

Molar conductivity of a solution at a given concentration is the conductance of volume V of a solution containing 1 mole the electrolyte kept between two electrodes with the area of cross-section A and distance of unit lengths

Now, l=1 and A=V (volume containing 1 mole of the electrolyte).

Molar conductivity increase with a decrease in concentration. This is because of the total volume V of the solution containing mole of the electrolyte increases on dilution.

Variation of molar conductivities with dilution:

For strong electrolytes, molar conductivity slowly increases with dilution.

For weak electrolytes, molar conductivity increases steeply on dilution, especially near lower concentrations.

for strong and weak electrolytes are shown in the following plot: (ref. image)

Explanation:

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