calculate the volume of na2s2o3 titrant used to reach the endpoint of the titration.

1. calculate the volume of na2s2o3 titrant used to reach the endpoint of the titration.
2. calculate the moles of na2s2o3 used to reach the endpoint
3. calculate the moles of naclo that were titrated
4. calculate the molar concentration of naclo in the dilute bleach
5. calculate the molar concentration of naclo in the original commercial bleach
6. convert the molar concentration of naclo in the original commercial bleach to a mass to volume ratio (grams of nacho per ml of bleach)
7. express the mass to volume ratio as percentage

initial buret reading 0.1 ml

final buret reading 18.29 ml

na2s2o3 concentration 0.1000 M

naclo concentration 8.25 %