During the titration of a strong acid against a strong base, a student uses methyl orange as an indicator. If the strong acid is taken in the conical flask and the base is added continuously from the burette, what colour change will be observed at the end point?

Step-by-step solution

Methyl orange is an acid-base indicator that is red in an acidic medium and yellow in a basic medium. Initially, the conical flask contains a strong acid, making the solution highly acidic. Therefore, the initial colour of the solution with the indicator is red. As the strong base is continuously added from the burette, the pH of the solution increases. At the end point, the acid is completely neutralized, and a slight excess of base makes the solution basic. Consequently, the colour of the indicator changes from r