Define conductivity and molar conductivity for the solution of an elec

1.	Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.
Answer» Conductivity : The reciprocal of resistivity is conductivity. Conductivity is the conductance of the electrolytic solution (due to the movement of ions and electrons) of one metre length and unit area of cross section. Mathematically, conductivity, K = 1/p Conductivity varies with concentration. As the number of ions per cm³ of solution decreases, conductivity decreases. Molar conductivity : The conductivity of one molar electrolytic solution is termed as molar conductivity. Mathematically, Molar conductivity (Δ_m) = k/c, where c = concemtration (in mol m^-3) K = conductivity (in S m^-1) It should be noted that for strong electrolytes there is only a small increase in Δ_m value with dilution. However for weak electrolytes, there is a large increase in Δ_m value with dilution.

Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.

Answer»

Conductivity : The reciprocal of resistivity is conductivity. Conductivity is the conductance of the electrolytic solution (due to the movement of ions and electrons) of one metre length and unit area of cross section. Mathematically, conductivity, K = 1/p
Conductivity varies with concentration. As the number of ions per cm³ of solution decreases, conductivity decreases.

Molar conductivity : The conductivity of one molar electrolytic solution is termed as molar conductivity. Mathematically,
Molar conductivity (Δ_m) = k/c,
where c = concemtration (in mol m^-3)
K = conductivity (in S m^-1)
It should be noted that for strong electrolytes there is only a small increase in Δ_m value with dilution. However for weak electrolytes, there is a large increase in Δ_m value with dilution.

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