Write a note on the difficulties associated with the measurement of resistivity of an ionic solution.

(N/A) The inverse of the resistance of an ionic solution is known as the conductivity of the ionic solution,given by $k = \frac{G^{*}}{R}$.
Accurate measurement of an unknown resistance can be performed using a Wheatstone bridge.
However,for measuring the resistance of an ionic solution,we face two main problems:
$1$. Firstly,passing direct current $(DC)$ through the solution changes its chemical composition due to electrolysis.
This difficulty is resolved by using an alternating current $(AC)$ source of power.
$2$. Secondly,an ionic solution cannot be connected to the bridge like a metallic wire or other solid conductor.
This second problem is solved by using a specially designed vessel called a conductivity cell.