since NaClO is reduced to NaCl and
the balanced reaction in ionic form is:
The mmol of sodium thiosulfate are 0.715 mL x 0.15 M = 0,107 While the mmol of NaClO (74,44 g/mol) are the half (0,0535). That are 0,0535x 74,44g/mol= 3,9 mg of NaClO= 0,00399 g.
the percent by weight of NaOCl in the bleach sample is