QUALITATIVE TEST OF CARBOXYLIC ACID.

QUALITATIVE TEST FOR CARBOXYLIC ACID

Qualitative test is defined as the parameter through which we identify any elements or any compounds in a given sample. The way of identification may be physical or chemical. OR,  may be can perform any reaction through which identity the specific type of elements.


CARBOXYLIC ACID;

Of the organic compound that show appreciable acidity, by far the most important are the carboxylic acid. These compounds contain the carboxyl group;


THE REQUIRED TEST’S;

1. LITMUS TEST;

First, and most important, there is the fact that carboxylic acids are acids at all.  So, as we all know that acids convert blue litmus to red. In the same manner carboxylic acid do the same converts blue litmus to red. Hydroxyl group in carboxylic acid is more acidic than in alcohol.

         
2. SODIUM BICARBONATE TEST;

Carboxylic acid reacts with sodium bicarbonate to evolve CO2 gas which can be seen in the form of brisk effervescence. The reaction;

3. ESTER TEST;

         Carboxylic acid reacts with alcohol in presence of concentrated sulphuric acid to form ester that is  identified by presence of fruity smell. In this way we can identify ester.

In this way we can identify the presence of carboxylic acid in the given sample. Carboxylic acid molecules are polar, and like alcohol molecule can form hydrogen bonds with each other and with other kinds of molecules.