Synthesis Bleach

Start by measuring 5.00 mL of commercial bleach in a 100 mL volumetric flask. The bleach was then diluted with distilled water until the contents reached the neck of the flask. Two grams of Potassium Iodide was then weighed out. Then, 25 mL of the diluted bleach solution was transferred into an E. flask by pipet. After that, the Potassium Iodide and 25 mL of deionized water was added to the E. Flash. The content of the flask were then swirled in order to properly dissolve the solid Potassium Iodide. The experiment was then moved to the fume hood, where 2 mL of 3 molar hydrochloric add were added to the E. Flask. The flask was then swirled for 2 minutes in the fume hood to ensure that no chlorine gas was produced by accident. The buret was filled

with 0.100 molar Sodium Thiosulfate. At this point the initial buret reading was recoded. The E. Flask was then titrated until it had a light yellow appearance. Once the color had changed from dark yellow (or red brown) to a pale yellow, one drop of starch solution was added to the E. Flask, causing the solution to change to a dark blue color. Once the starch was added, titration was continued in order to fully fade the blue color. Once the solution was clear, the final buret reading was written down. This process was then repeated three more times in order to obtain multiple trial results.