The titration of ammonia (NH3) with boric acid (H3BO3) does not typically result in a distinct color change. Boric acid itself is a weak acid and does not have a characteristic color change during titration.
However, if you are using a pH indicator during the titration, the color change will depend on the specific indicator you choose. There are several indicators that can be used in the pH range of ammonia and boric acid, such as bromothymol blue (pH range 6.0-7.6) or methyl orange (pH range 3.1-4.4).
In the case of bromothymol blue, it is yellow in acidic conditions (pH < 6.0) and blue in basic conditions (pH > 7.6). During the titration, as you add boric acid to ammonia, the pH will shift from basic to acidic. Therefore, you may observe a transition from blue to yellow as the titration progresses.
For methyl orange, it is red in acidic conditions (pH < 3.1) and yellow in basic conditions (pH > 4.4). Since the pH range of the titration falls between 3.1 and 4.4, methyl orange may not exhibit a significant color change during the titration.
It's important to note that the choice of pH indicator and the specific pH range of the titration may vary depending on the experimental conditions and the desired accuracy.