Determination of Hydrogen Peroxide by Iodometric Titration
Determination of Hydrogen Peroxide by Iodometric Titration
Question 1
H2O2 oxidizes iodide to iodine in the presence of acid and starch solution. The iodine formed is titrated with thiosulfate solution, incorporating a starch indicator.
Potassium iodide solution (1% w/v). Dissolve 1.0 grams KI into 100 mLs demineralized water. Store capped in cool place away from light. Yellow-orange tinted KI solution indicates some air oxidation to iodine, which can be removed by adding a 1-2 ...