The characterisation of ethylene Principle Ethanol can be catalytically dehydrated to ethylene. Apart from aluminium oxide, anhydrous aluminium sulphate or aluminium asbestos are also suitable. Potassium permanganate acts as an oxidizing agent in the presence of double bonds. The characteristic colour change from violet to brown results from the formation of manganese hydroxide: 3 C2H4 + 2 KMnO4 + 6 H2O → 3 HO-CH2-CH2-OH + 2 MnO(OH)2 + 2 KOH The homologous series of the alkenes can be developed just as it was done for the alkanes. The similarities can be demonstrated by means of solubilities, combustibilities, reactivities etc. (e.g. compared to hexene). Learning objectives - Ethylene can be prepared by the reduction of ethanol with aluminium oxide.
- Ethylene is an "unsaturated" and therefore relatively reactive hydrocarbon, which belongs to the group of olefins.
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- Experiment is part of a complete solution set with experiments for the topic Organic Chemistry matched with international curriculum: all topics are covered
Support base, variable
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02001-00
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1
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Stand rods, stainless steel, various sizes
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02059-00
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1
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Boss head
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02043-00
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1
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Spoon, special steel
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33398-00
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1
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Dish, plastic, 150x150x65 mm
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33928-00
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1
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Test tube,180x22 mm, PN19
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MAU-17080101
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1
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Glass tube,right-angled,.
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MAU-10030703
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1
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Test tube, laboratory glass, various lengths, 100 pcs.
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37658-10
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1
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Test tube brush w. wool tip,d20mm
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38762-00
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1
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Test tube rack, wood, for 6 tubes d= 22mm
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MAU-20042200
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1
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Universal clamp
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37715-01
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1
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Rubber stoppers, without bore, various diameters
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39255-00
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2
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Rubber stopper, d = 22/17 mm, 1 hole
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39255-01
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1
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Rubber hose, various diameters
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39282-00
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1
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Protecting glasses, clear glass
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39316-00
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1
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Ethanol extra pure ab.95% 1000 ml
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30008-70
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1
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Aluminium oxide 250 g
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30020-25
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1
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Glycerol, 250 ml
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30084-25
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1
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Potassium permanganate, chem. pur., 250 g
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30108-25
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1
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Sodium carbonate, anhyd. 1000 g
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30154-70
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1
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Water, distilled 5 l
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31246-81
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1
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Butane burner with cartridge, 220 g
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32180-00
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1
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Sea sand, purified 1000 g
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30220-67
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1
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