Friday, October 9, 2020

Difference between conductometric and potentiometric titration

Titration is a method where a known concentration of analytics is used to determine the concentration of an unknown sample. The major difference between potentiometric and conductometric titrations is that the potentiometric titration determines the potential across the solute, while conductometric titration determines the electrolytic conductivity of the sample.
Titration is an analytical technique in which the concentration of a solute is determined using a titrant that acts as the standard of known concentration. We can determine the concentration of an unknown solution from that titrant. Titrations can be classified as acid-base titration, redox titration, precipitation titration, and complexometric titration.
Potentiometric titration is a volumetric method which is parallel to direct titration of a redox reaction. This method is a useful way of characterizing an acid. Potentiometric titration uses an indicator electrode instead of an indicator to monitor the endpoint of the titration. Glass and metal ion electrodes are usually indicator electrodes. The potentiometric titration is generally performed using the pH meter as it determines the potential difference between the pH electrode and a reference electrode.
Conductometric titration is a laboratory technique of quantitative analysis that is used to identify the concentration of a given solute in a sample mixture. It is a type of titration in which the reaction mixture's electrolytic conductivity is continuously observed as a reactant is added. The equivalence point is the point at which a sudden change is observed in the conductivity.

Commonly asked questions on titration are as follows.

What are the types of titration?
Titrations can be classified as acid-base titration, redox titration, complexometric titration, and precipitation titration.

What is the major advantage of conductometric titration?
The major advantage of conductometric titration is that the indicators are not necessary to perform the analysis since the change of solution conduction is measured by the conductor meter.

What is the major advantage of potentiometric titration?
The major advantage of using the potentiometric titration is that it is an inexpensive and accurate method and the equivalence point is not determined using the color indicator.


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