Question

During conductometric titration of 0.1 M HCl with 1.0 M KOH, which of the following will be observed?

• A. Resistance of the solution decreases upto equivalence point and then increases
• B. Resistance of the solution increases upto equivalence point and then decreases
• C. Conductance increases upto equivalence point and then decreases
• D. Conductance decreases upto equivalence point and then becomes almost constant

Answer 1

The correct option is B Resistance of the solution increases upto equivalence point and then decreases

Conductometric titration is a type of titration in which the electrolytic conductivity of the reaction mixture is continuously monitored as one reactant is added. During titration, the conductance of the solution first decreases, reaches a minimum value at equivalence point (end point) and then increases (as shown in graph).

Since, resistance is the inverse quantity of conductance. It increases first up to the equivalence point and then decreases.