Lab Report 5

Lab Report 5 - Sodium Hypochlorite in Bleach by Richard...

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Sodium Hypochlorite in Bleach by Richard Salvagno Lab Instructor: Michael Coleman September 28, 2009
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Purpose: The purpose of this lab was to use the ability of hypochlorite ion to serve as an oxidizing agent to determine the molarity of hypochlorite ion in commercially available bleach. Methods: In a clean, dry 25 mL graduated cylinder, 40 mL of Clorox bleaching solution was obtained and placed in a clean, dry beaker. Using a 10 mL pipet, 10 mL of the bleaching solution was transferred into a clean 100 mL volumetric flask. Distilled water was added to the flask until it was approximately two-thirds full. The solution was inverted several times and the flask was filled to the ring mark on the flask. The solution was inverted several times again. The solution was transferred into a clean, dry beaker. Approximately 10 to 15 mL of the diluted bleach solution was poured into a clean beaker and the 10 mL volumetric pipet was rinsed with 3 to 4 mL of the solution. Next about 50 mL of distilled water was placed in a clean 250 mL Erlenmeyer flask. 5.0 mL of 10.0% KI solution was added to this flask. Using the pipet, 10 mL of the diluted bleach solution was also added to this flask. Then approximately 2 mL of 6 M HCl was added to the flask as well. The contents of the flask were then swirled to mix them together. Approximately 75 mL of standardized 0.1013M-thiosulfate solution was placed in
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This note was uploaded on 04/25/2010 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell.

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Lab Report 5 - Sodium Hypochlorite in Bleach by Richard...

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