Question

What are the physical significances of molar conductivity?

Answer 1

Molar conductivity represents the conducting power of all the ions produced by one mole of an electrolyte in a given volume of the solution. It helps in understanding how effectively an electrolyte dissociates into ions and conducts electricity in a solution. Specifically, it gives insight into:

1. Ion Mobility: Higher molar conductivity implies higher mobility of ions.
2. Degree of Ionization: For weak electrolytes, molar conductivity increases significantly with dilution due to increased ionization.
3. Electrolyte Strength: Strong electrolytes show a gradual increase in molar conductivity with dilution, approaching a limiting value at infinite dilution.
4. Electrochemical Analysis: It is used in determining the dissociation constants of weak electrolytes and in calculating the solubility of sparingly soluble salts.