German version
| Supermarket products: |
| bee honey |
| invert sugar cream (artificial honey) |
| Dr. Oetker's "Whip it" (whipping cream stabilizer) |
| Betaisodona® solution (from Mundipharma, Germany) |
"Whip it" is a starch product. It binds the liquid parts of the whipped cream together.
Betaisodona® solution is a non-specific antiseptic agent. It contains povidone-iodine (iodine complex). The desinfecting agent releases iodine, which desactivates viruses.
Apparatus and glass wares:
| hotplate
| 4 beakers 100 mL
| glass stirring rod
| thermometer | |
Experimental procedure:
One 100 mL beaker contains 20 mL of bee honey, another contains 20 mL of invert sugar cream. The contents of the beakers are each dissolved in
60 mL of dist. water while stirring. Now 5 mL of the aqueous solution of the cream stabilizer is added to each of the two beakers. The solutions are heated at 40 °C for one hour. Then some drops of the Betaisodona® solution are added to the beakers.
Results:
The solution of the "artificial honey" turns blue. The bee honey solution remains yellowish.
Video clip (Download RealPlayer .rm file)
Discussion and background:
· Evidently artificial honey is unable to break down the added starch. The rapid reaction of iodine with starch results in the formation of an iodine starch complex indicated by the instantaneous appearance of a deep violet blue color.
