lab 4 - Sodium Hypochlorite in Bleach By Robert Dutchen Lab...

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Sodium Hypochlorite in Bleach By Robert Dutchen Lab Instructor: Samik Jhulki October 4, 2010 Purpose: To determine the molarity of the hypochlorite ion in Clorox bleach using a titration set up
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Procedure: A dry 25 mL graduated cylinder was used to obtain 40 mL of bleach in a beaker. A 10 mL volumetric pipet was then rinsed with 5 mL of bleach and this liquid was disposed of. 10 mL of bleach was then put into a 50 mL volumetric flask via the pipet. The flask was then filled two-thirds of the way with distilled water, mixed, and then more distilled water was added until the bottom of the meniscus meet with the ring mark on the flask. The diluted bleach solution was then poured into a new beaker. 10 mL of the diluted bleach solution was put into a separate beaker. The 10 mL volumetric was rinsed with 3 mL of diluted bleach. 50 mL of distilled water was put into a 250 mL Erlenmeyer flask to which 5 mL of 10.0% KI solution was added. The 10 mL volumetric pipet was used to add the 10 mL aliquot of diluted bleach to the Erlenmeyer flask. 2 mL
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