Question

Define, write the formula and unit of molar conductivity.

Answer 1

Hint : Molar conductivity is calculated by dividing the conductivity of an electrolytic solution by the molar concentration of the electrolyte, and it represents the efficiency with which a certain electrolyte conducts electricity in solution.

Complete Step By Step Answer:
The conductance property of a solution containing one mole of electrolyte, or a function of a solution's ionic strength or salt concentration, is known as molar conductivity. As a result, it isn't always the same.
In other words, molar conductivity is the total conducting power of all the ions generated when a mole of electrolyte is dissolved in a solution. Molar conductivity is a feature of an electrolyte solution that is primarily used to determine an electrolyte's efficiency in conducting electricity in a solution. As a result, it is not a constant.
Molar conductivity formula:
Mathematically, molar conductivity is represented by the following expression.
${ \wedge _m} = \dfrac{K}{C}$
$K$ is the specific conductivity, while $C$ is the mole per litre concentration.
The molar conductivity of an electrolytic solution is defined as the conductance of a volume of solution containing a unit mole of electrolyte put between two electrodes of unit area cross-section or at a distance of one centimetre apart.
The molar conductivity unit: $S \cdot {m^2} \cdot mo{l^{ - 1}}$.

Note :
With a decrease in concentration or dilution, the molar conductivity of both weak and strong electrolytes increases. The molar conductivity is defined as the conductivity provided by one mole of ions. We're still dealing with the same unit mole of ions after dilution. Increased dilution, on the other hand, causes more electrolytes to dissociate into ions, essentially increasing the quantity of active ions in the solution. More conductivity is imparted by these active ions.