Redox Titration Of The Active Ingredient In Bleach

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Redox Titration of the Active Ingredient in Bleach Hypothesis: If we find the molarity of thiosulfat then we can use it to find the percent of NaCl in bleach, we should be a low percent. Procedure… Control- Thiosulfate. Constants- Erlenmeyer Flask and Buret. Independent Variable-Amount of thiosulfate added. Dependent Variable- Titration point of the solution. Variables- None, no graph. Part One 1.Obtain safety goggles! 2.Get and thoroughly wash out a 50 mL buret. 3.Fill the buret with thiosulfate; record the volume on the data table. 4.Clean a 250 mL Erlenmeyer flask, and add these ingredients to the flask accordingly. a.25 mL of .010 KIO3. b.25 mL of distilled water. c.2 grams KI. d.10 mL of 2M H2SO4. 5.Mix the ingredients in the Erlenmeyer flask completely. 6.Immediately begin to titrate with thiosulfate. 7.Titrate until the solution gives off a pale yellow color. 8.Add 5 mL of starch. 9.Titrate until the solution is clear. 10.Record the buret volume of thiosulfate. 11.Repeat procedure again. Part Two 12.Use the thiosulfate to refill the 50 mL buret. 13.In a Erlenmeyer flask, add 1 mL of bleach. 14.Add this Erlenmeyer flask to 25 mL of distilled water. 15.Dissolve 2g of KI in the flask. 16.Add 10 mL of 2M H2SO4. 17.Mix solutions. 18.Titrate with thiosulfate. 19.When the solution gives off a pale yellow color, add 5 mL of the starch indicator. 20.Titrate until the solution is clear. 21.Record the buret volume of

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