Kohlrausch's Law and its Application
Kohlrausch's Law and its Application: Overview
This topic covers concepts such as Equivalent Conductivity at Infinite Dilution, Kohlrausch's Law, Applications of Kohlrausch's Law, Determination of Molar Conductivity of a Weak Electrolyte at Given Concentration, etc.
Important Questions on Kohlrausch's Law and its Application
What is limiting molar conductivity of ions?

The molar conductance and the specific conductance of an electrolyte are related by the formula

The molar conductance of electrolyte is at . Calculate its specific conductance.

The specific conductance of of an electrolyte is at . Calculate the molar conductance.

Calculate the molar conductance of solution of an electrolyte which has a resistance of at . Cell constant is .

If the value of molar conductivities at infinite dilution for , and are and respectively at . Calculate the molar conductivity at infinite dilution of in . (Just mention the value, no requirement of units in the answer).

The molar conductivity of a solution of a weak acid is times smaller than the molar conductivity of a solution of a weak acid . If , the difference in their values, , is (consider degree of ionization of both acids to be )

for and are and respectively. Calculate for .

Define limiting molar conductivity .

What is meant by limiting molar conductance ?

The molar conductivity of methanoic acid is . Calculate the degree of dissociation. Given : ; .

The molar conductivities at infinite dilution for and are and respectively at . Calculate the molar conductivities of at infinite dilution.

State Kohlrausch law of independent migration of ions. Why does the conductivity of a solution decrease with dilution?

Consider the galvanic cell, . After running the cell for sometime, the concentration of the electrolyte is automatically raised to . Molar conductivity of the is about and limiting molar conductivity of is about . If of water is , calculate the boiling point of the electrolyte at the end of the experiment.

At the molar conductance of hydrofluoric acid is and its . The value of the dissociation constant of the acid at the given concentration at is

Equivalent conductivity at infinite dilution for sodium- potassium oxalate will be [ given : molar conductivities of oxalate, and ions at infinite dilution are , respectively.

The equivalent conductance of solution of a weak monobasic acid is and at infinite dilution is . The dissociation constant of this acid is

The ionization constant of a weak electrolyte is , and molar conductance of its solution is . The molar conductance at infinite dilution is:

The values of limiting ionic conductance of ions are respectively . If the molar conductance of methanoic acid at , the dissociation constant of methanoic acid at is:

The limiting molar conductivities of and are respectively . The molar conductivity of solution is at the same temperature. The degree of dissociation of acetic acid solution at the same temperature is
