14-11. A 5.00-mL aliquot of liquid bleach is diluted to 25.00 mL in a volumetric flask. A 10.00-
mL aliquot of this solution was placed in a coulometric titration cell containing 75 mL of
0.1 M Fe3+. The hypochlorite in the bleach was titrated with electrogenerated Fe2+:
$OCl^- + 2Fe^{2+} + 2H^+ \longrightarrow Cl^- + 2Fe^{3+} + H_2O$
At a constant current of 20.00 mA, it took 244.3 s to reach the end point. Calculate the
concentration of sodium hypochlorite as mg NaOCl/mL bleach.