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 31.00 mL of 0.500 M HCl to reach the equivalence point?

A) 0.275 M
B) 0.333 M
C) 0.775 M
D) 1.28 M