Sodium Hypochlorite,NaOCl,is the Active Ingredient in Household Bleach

Multiple Choice

Sodium hypochlorite,NaOCl,is the active ingredient in household bleach.What is the concentration of hypochlorite ion if 20.00 mL of bleach requires 32.00 mL of 0.500 mol L^-1 HCl(aq) to reach the equivalence point?

A) 0.300 mol L^-1
B) 0.312 mol L^-1
C) 0.800 mol L^-1
D) 1.30 mol L^-1