Why Does Molar Conductance Increases With Dilution?

Molar conductivity is the conductance property of a solution containing one mole of the electrolyte or it is a function of the ionic strength of a solution or the concentration of salt.

Definition

The molar conductivity is defined as the conducting power of all the ions that are formed by dissolving a mole of electrolyte in a solution.

Molar conductance and dilution

Molar conductance is dependent on the concentration of the electrolyte. When the solution is dilute the number of ions available per unit volume reduces, resulting in reduction of the conductivity.

Molar conductance increases with dilution.

Molar conductance is dependent on the concentration of the electrolyte. When the solution is dilute the number of ions available per unit volume reduces, resulting in the reduction of the conductivity.

  • The molar conductivity of both weak and strong electrolytes increases with a decrease in concentration or dilution.
  • The molar conductivity is the conductivity offered by one mole of ions.
  • Even after dilution, we are still considering the same unit mole of ions.
  • But however, the increased dilution results in the dissociation of more electrolytes into ions and effectively increasing the number of active ions in the solution.
  • These active ions impart more conductivity.

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