Detection reaction for unsaturated fats (2) © Christian Herdt/Siemens Stiftung 2016 CC BY-SA 4.0 international

Detection reaction for unsaturated fats (2)

Addition of iodine/potassium iodide solution: Exactly two drops are added to each test tube.
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The big advantage of using a commercially available, ready-to-use solution from a pharmacy or a laboratory supply company for the iodine/potassium iodide solution is the consistent composition. Self-prepared I2/KI solutions vary in their concentration. The iodine contained in the added solution is taken up by unsaturated fats. This will play an important role later when starch powder that is at least partially water-soluble is added.
Experiment; Illustration
Grade 7 to 9
Middle/high school
Chemical compound; Chemical reaction; Fats
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Christian Herdt
© Christian Herdt/Siemens Stiftung 2016