Titration Of a Bleach Solution

Titration of a Bleach Solution

There are a variety of titrations that can be used to determine the unknown concentration if a know reactant is present. Usually the most common titrations thatare used are acid base titration and redox titrations (oxidation – reduction). A redox titration engage the addition of an oxidizing or reducing agent to a solution that already have reducing andoxidation agents. Two solutions are being used, one with a known concentration, the other one without it. The titration would be completed when the equivalence point is reached. The oxidizing agent inliquid bleach is sodium hypoclorite. In this experiment Potassium Permanganate concentration will be found in order to find the concentration of sodium hypoclorite in bleach.

Objective:
* Todetermine the concentration of Hydrogen Peroxide in a commercial bleach.
Materials and Reagent Required:
*
* Any brand of bleach
* 125 mL Erlenmeyer flask
* 50 mL Buret
* MagneticPlate
* Magnetic bead
* 1.0 M KMnO4
* 2.0 M NaClO
* Double Buret Clamp
* Ring Stand
* Deionized Water
* 250 mL Beaker

Procedure:
A. Preparing the Bleach forTitration
1. Dilute 3.00 mL your bleach to 100.0 mL deionized water.
2. Weight an empty 125 mL Erlenmeyer Flask.
3. Pipet 25 mL of your dilute solution into a 125 mL Erlenmeyer Flask.4. Weight the 125 mL Erlenmeyer Flask with the 25 mL diluted bleach.
B. Titration if Dilute Bleach Solution
5. Clean your burette with 5mL of deionized water (dispense water troughtip). Rinse your buret with 5mL of 1.0 M KMnO4 (dispense into a empty beaker trough the tip).
6. Fill the burette with 50mL of 1.0 M KMnO4. (The meniscus should be above 0.0 mL).
7. Placethe 125 mL Erlenmeyer flask with the 25 mL diluted bleach over the magnetic plate and insert the magnetic bead.
8. Add about 1 cm3 of potassium iodide to the dilute bleach, along with 15 mL...