Peroxide Lab report - Redox Titration How much Hydrogen...

This preview shows page 1 - 4 out of 7 pages.

Redox Titration: How much Hydrogen Peroxide in bleach? Jasmine Rand David Hagstrom Jacqueline Cedeno Yousif Youhana Denise Napolitano Section L13 Monday 2:30
Introduction: The purpose of this lab is to be able to determine the KMnO 4 solutions concentration. This will be done by titration solid iron (III) ammonium sulfate hexahydrate. The determined molarity of KMnO 4 solution will be used to titrate bleach. This is a processes called standardization. Standardization is important because it reflects the exact concentration and pH of an element. A titration is a technique where a solution of a known concentration is used to determine the concentration of an unknown solution. In part one the following redox reaction will be used in the standardization of KMnO 4 , ??? 4 ( ?? ) + 5 ?? 2+ ( ?? ) + 8 ? + ( ?? ) → ?? 2+ ( ?? ) + 5 ? e 3+ ( ?? ) + 4 ? 2 ? ( ? ). In this reaction MnO 4 - ions are reduced while Fe2+ ions are oxidized. In part two the redox reaction will look like, 2 ??? 4 ( ?? ) + 5 ? 2 ? 2 ( ?? ) + 6 ? + ( ?? ) → 2 ?? 2+ ( ?? ) + 5 ? 2 ( ? ) + 8 ? 2 ? ( ? ). In this reaction H 2 O 2 is oxidized which forms O 2 and MnO 4 - ions are reduced which then forms Mn 2+ ions. When the titration has met its end point the color will turn a very soft light pink color. Procedures: The purpose of the lab was to use titration to ultimately determine the percent by mass of hydrogen peroxide that is contained within bleach. To perform this, it was first necessary to have certain safety precautions, such as wearing lab coats, safety goggles, closed toed shoes, and gloves, as the experiment deals with very concentrated acids. After taking safety precautions, it was necessary to have a standardized solution of potassium permanganate, which was determined by titrating a solution containing 0.25- 0.30 grams of FAS, determined by adding FAS to a weighing boat that was zeroed out on a scale, 10mL of distilled water, determined by using a 15mL graduated cylinder, 2.0mL
of 9M , determined by using a 15mL graduated cylinder, and two drops of 6M , determined by using a dropper, into a 50mL beaker; the titrant was , and was titrated with

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture