Region B of the titration curve can be used to determine the pH
Henderson-hasselbalch equation is mostly used for buffer solutions. Buffer solutions are the solutions of weak acids and their salts, for example, the mixture of acetic acid and sodium acetate will act as a buffer solution. The major role of buffer solution is to resist the change in pH.
So it is clear that buffer solutions have an acid and a conjugate base, so region B can represent the pH. Region A of the titration curve represents the acid solution, region C represents the endpoint. While the other two regions are out of the system.
Complete question: (Graph is attached as a picture)
You can also learn about titration curve from the following question:
https://brainly.com/question/28166586
#SPJ4
