Redox Titration of Hydrogen Peroxide

Redox Titration of Hydrogen Peroxide - 36 Hydrogen Peroxide...

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36 Hydrogen Peroxide Titration Background Experimental Problem Determine the concentration of hydrogen peroxide in a commercial preparation and compare the results to the concentration stated on the label. Educational Purpose To introduce titrations, the use of burets and the term "aliquot". What To Turn In 1. The prelab and postlab 2. An abstract that follows the guidelines provided in General Chemistry I lab. Titrations This experiment determines the concentration of hydrogen peroxide (H 2 O 2 ) in a commercial solution by performing a titration with potassium permanganate (KMnO 4 ). Review the "Performing Titrations" on the lab information web page. The redox titration described on this page is the one you will perform today. The molecular equation for the reaction that occurs during the titration is: 2 KMnO 4 (aq) + 5 H 2 O 2 (aq) + 3 H 2 SO 4 (aq) 2 MnSO 4 (aq) + 5 O 2 (g) + 8 H 2 O(l) + K 2 SO 4 (aq) Aliquots An aliquot is a small portion of a larger solution. Read the procedure section and note how the word "aliquot" is used. The taking of aliquots is quite common when performing titrations. It
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This note was uploaded on 11/12/2011 for the course CHEM CHEM 2B taught by Professor Cabrera during the Spring '09 term at San Jose City College.

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Redox Titration of Hydrogen Peroxide - 36 Hydrogen Peroxide...

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