Answer:
The volume required for the titration is 20.49mL.
Explanation:
In a titration of an acid, you must fill the burette until a particular volume (In the problem, the burette is filled until 2.49mL).
Then, when the titration is ran, the final volume helps to find the volume required to the titration as follows:
Volume of titration = Final Volume - Initial volume
Volume of titration = 22.98mL - 2.49mL = 20.49mL