Is it necessary to know the exact volume of the unknown acid or base to be titrated?

YES

Explanation:

Titration is an analytical method or technique which is used to determine the concentration of an unknown solution, called analyte; by using a solution of known volume and concentration, called titrant.

In this method, the volume of the titrant used to neutralize the given analyte is noted and then the concentration of the unknown solution or the analyte is calculated by using the following equation:

Here, is the known concentration of the titrant

is the unknown concentration of the analyte

is the volume of the titrant used during the titration

is the known volume of the analyte

Therefore, in order to determine the concentration of the unknown solution or the analyte, the exact volume taken should be known.

c. 4.54 x 10–12 j happens to be correct