Suppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you read the base titrant volume as 2.49 mL. After running the titration and reaching the endpoint, you read the base titrant volume as 22.98 mL. What volume, in mL, of base was required for the titration?

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

there are two significant figures.