Question

Give the advantages and disadvantages of potentiometric titration.

Answer 1

Potentiometric titration is a method of determining concentration of unknown solute in a solvent under the influence of potential applied between two electrodes.
Potentiometric titration involves two types of basic electrodes: one is known as indicator electrode and another one is standard electrode.

Complete answer:
Some basic disadvantage and disadvantage of Potentiometric titration includes-

ADVANTAGES	DISADVANTAGES
Simple titration method	More complex than simple acid- base titration
Require less amount of time for completion of process	It requires special assembly to carry out process
This does not require any indicator	Galvanic cell is used to carry out the process
End result of the reaction is easily visible.	Require electrodes of metal like silver, hydrogen.
Reaction is not interfered by reaction poison like mercury etc.	Overall cost of the process is high
Equilibrium of the reaction achieved quickly	Continuous supply of electricity is mandatory
Accuracy of the end result is good.	Electrolyte used in the reaction must be freshly prepared.
This titration can be performed even in the presence of a small amount of solute whose concentration is to be determined.	Variation in electrolyte pH alters the result of titration.
This reaction is helpful to determine the end result of the titration when there is lack of some suitable indicator for the reaction.	There is always a need for some standard electrode like calomel electrode, hydrogen electrode, or other metal chloride electrode.
This titration may become automated by using computers to get self-generated data.	Contamination during electrolyte preparation may cause deflection from actual results.

Note:
End point of the titration is determined by calculating the potential drop in the cell.
A graph is plotted at the last between potential applied and volume of electrolyte solution.