From the concentration and volume of the added Na2S2O3 solution used to titrate each unknown bleach sample,
calculate the weight of sodium hypochlorite, NaOCl.
Given:
- Volume of Na2S2O3 added was 18.5 mL
- Concentration of Na2S2O3 was 1.0 M
- mass of unknown bleach was 0.7152 g
Additional info:
HOCl (aq) + 2(S2O3)2- (aq) + H+ (aq) --> Cl2(aq) + (S4O6)2- (aq) + H2O(l)