Friday, March 3, 2023

Why water is not used in non aqueous titration

Non-aqueous titration works on the same principles (Bronsted-Lowry Theory) as acid-base titration, according to which an acid is a chemical that can give a proton to another substance, and a base is a substance that can accept a proton.

We use non-aqueous titration to titrate organic acids and bases that are insoluble in water but soluble in non-aqueous solvents. Both potentiometric and indicator approaches can be employed to identify endpoint in non-aqueous titrations.

Why water is not used in non-aqueous titration?

Because water can act as a weak base and a weak acid, and so compete in proton acceptance or proton donation with other weak acids and bases dissolved in it. Therefore, titration using a medium that does not contain water is required.

The interference of water (H2O) molecules in the titration is the rationale for non-aqueous titrations. Dissolving bases and acids in water causes water molecules to compete with each other for proton donation and acceptance.

So, a titration method that doesn't involve water molecules is needed. To determine substances, a process known as non-aqueous titration uses non-aqueous solvents. Four different types of solvents can be used in a non-aqueous titration that is aprotic, protophilic, amphiprotic protogenic, and solvents. Alcohols, glacial acetic acid, chloroform, acetonitrile, and ammonia, are a few examples of non-aqueous solvents.


Commonly asked questions on non-aqueous titration are as follows:

What should be avoided in non-aqueous titration?

In a non-aqueous titration, moisture should be avoided so that the solution can be neutralized and the right endpoint can be found.


Which titration does not contain water as a solvent?

Non-aqueous titration is a type of titration in which water is not included as the solvent but rather the analyte is dissolved in a non-aqueous solvent.

Which indicator is used in non-aqueous titration?

In non-aqueous titrations, indicators such as methyl red, crystal violet, thymol blue, naphtholbenzein, etc. are used as indicators to determine the endpoint or equivalence point of the titration.

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