Final answer:
The volume of added base at the equivalence point for HCl is 23.0 mL.
Step-by-step explanation:
The volume of added base at the equivalence point for HCl in this titration can be determined by using the stoichiometry of the reaction between HCl and KOH. The balanced equation for this reaction is:
HCl + KOH -> KCl + H2O
From the equation, we can see that the stoichiometric ratio between HCl and KOH is 1:1. Therefore, the volume of added base at the equivalence point for HCl is equal to the volume of HCl used in the titration, which is 23.0 mL.