Question

A 100.0 ml sample of .50 M HCl (aq) is titrated with a .10 M NaOH. What volume of the NaOH solution is required to reach the endpoint of the titration?

Answer 1

I don't know about the end point because I don't know what indicator you are using; however, I can tell you about the equivalence point (you must be careful with those two words.)
mols HCl = M x L = ?
mols NaOH = mols HCl
M HCl = moles HCl/L HCl. You know mols and M, solve for L