Explain the effect of concentration on molar conductivity of weak and strong electrolytes
Conductivity is the conductance of a one-centimeter cube of the solution. Upon diluting the
the solution, the concentration of ions per centimeter cube decreases, and therefore, the
conductivity decreases.
The increase in molar conductivity on dilution is due to the fact that it is the product of
conductivity (κ) and the volume (V) of the solution containing one mole of the electrolyte.
Λ = κ × V
On dilution, conductivity decreases but volume containing one mole of an electrolyte
increases. The increase in volume on dilution is much more than the decrease in
conductivity. As a result molar conductivity increases with dilution.
The molar conductance of strong (HCl, KCl, KNO3) as well as weak electrolytes
(CH3COOH,NH4OH) increase with a decrease in concentration or increase in dilution.
Conductivity is the conductance of a one-centimeter cube of the solution. Upon diluting the
the solution, the concentration of ions per centimeter cube decreases, and therefore, the
conductivity decreases.
The increase in molar conductivity on dilution is due to the fact that it is the product of
conductivity (κ) and the volume (V) of the solution containing one mole of the electrolyte.
Λ = κ × V
On dilution, conductivity decreases but volume containing one mole of an electrolyte
increases. The increase in volume on dilution is much more than the decrease in
conductivity. As a result molar conductivity increases with dilution.
The molar conductance of strong (HCl, KCl, KNO3) as well as weak electrolytes
(CH3COOH,NH4OH) increase with a decrease in concentration or increase in dilution.
