1. Experiments with rapeseed oil For the Comenius project We are what we eat 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany1

2. Experiments with rapeseed oil Saponification 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany2

3. Experiments with rapeseed oil Index Theory Chemicals and materials Method 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany3

4. Experiments with rapeseed oil Theory Soponification: Cleavage of the esterbonds in a fat molecule by potasium hydroxide or sodium hydroxide 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany4 Soap

5. Experiments with rapeseed oil Chemicals 200g rapeseed oil 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany5 Sodium chloride 200ml 25% sodium hydroxide (NaOH) 100ml distilled water

6. Experiments with rapeseed oil Materials pot 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany6 hot plate with magnetic stirrer

7. Experiments with rapeseed oil Method The rapeseed oil and the distilled water are heated in the pot. 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany7

8. Experiments with rapeseed oil Method The solution is stirred and we add the sodium hydroxide. 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany8

9. Experiments with rapeseed oil Method The sodium chloride is added to our product. 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany9

10. Experiments with rapeseed oil Method Finally the soap is seperated from water and glycerol. The soap can be pressed into shape now. 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany10

11. Experiments with rapeseed oil Transesterification 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany11

12. Experiments with rapeseed oil Index Theory Chemicals and materials Method 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany12

13. Experiments with rapeseed oil Theory Transesterification:Concersion of a fatty acid glycerol ester molecule into three fatty acid methyl ester molecules 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany13 Biodiesel

14. Experiments with rapeseed oil Chemicals 100ml rapeseed oil 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany14 5 sodium hydroxide pellets 30ml methanol

15. Experiments with rapeseed oil Materials condenser for boiling under backflow 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany15 hot plate with magnetic stirrer

16. Experiments with rapeseed oil Method The chemicals are placed in the round bottomed flask. Then we heat to the boil under backflow cooling. The final step is to separate the resulting biodiesel from glycerol and water 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany16

17. Experiments with rapeseed oil Thank you for listening! 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany17

18. Experiments with rapeseed oil Anja Bubenheimer Jascha Bandemehr Katharina Dietz CTA Singen, Germany 10.09.2015Hohentwiel-Gewerbeschule-Singen/CTA/Germany18