Answer:
Because of its clear and distinct color variance at different pH values
Step-by-step explanation:
The best known liquid indicators are methyl orange and phenolphthalein. Methyl orange changes color in an acidic medium while phenolphthalein changes color in a basic medium.
Methyl orange is a pH indicator, which is often used in titrations. It is suitable for use due to the clear color change. The color change interval of this indicator is in the pH neutralization interval for medium-strong acids, so it is often used for acid titrations.