Why do chemists often perform a rough titration before performing their titrations? .....

Question

Why do chemists often perform a rough titration before performing their titrations? Why can a chemist not use the data generated from the rough titration to calculate the concentration of the unknown solution?

Answer 1

Chemists often performed rough titrations initially to get a good sense of the appropriate volume needed for that specific procedure. However, the data from the rough titration shouldn't be used because it is not as precise as a fine titration, therefore the data would be inaccurate.