The reactivity of the alkanes  ![]()
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Unknown Principle
Test the reactivity of heptane and liquid paraffin.The bond energy for C-C bonds (348 kJ mol-1) and C-H bonds (413 kJ mol-1) is relatively high for non-polar bonds (for comparison, Br-Br: 193 kJ mol-1). They are therefore difficult to attack. In addition, by reason of the low polarity, there is no appropriate target for an electrophilic or for a nucleophilic attack. Only very energy-rich radicals can react with alkanes under normal conditions. The test with potassium permanganate serves here already as an introduction to double bonds (Baeyer test). Learning objectives - Alkanes are very unreactive. They do not react even with strong acids or oxidizing agents.´
- The low reactivity of the alkanes results from the non-polar, and therefore hardly attackable, single bonds.
Benefits - Easy teaching and efficient learning by using interactive experimentation PHYWE-Software
- Experiment is part of a complete solution set with experiments for the topic Organic Chemistry matched with international curriculum: all topics are covered
Scope of delivery |
Test tube, laboratory glass, various lengths, 100 pcs.
|
37658-10
|
1
| |
Test tube brush w. wool tip,d20mm
|
38762-00
|
1
| |
Test tube rack, wood, for 6 tubes d= 22mm
|
MAU-20042200
|
1
| |
Test tube holder, up to d 22mm
|
38823-00
|
1
| |
Laboratory pen, waterproof, black
|
38711-00
|
1
| |
Rubber stoppers, without bore, various diameters
|
39255-00
|
6
| |
Protecting glasses, clear glass
|
39316-00
|
1
| |
Rubber gloves, size M (8), one pair
|
39323-00
|
1
| |
Pipettes with rubber cap, various sizes
|
64701-00
|
3
| |
Potassium permanganate, chem. pur., 250 g
|
30108-25
|
1
| |
Liquid Indicator pH1-13 UNISOL113
|
47014-02
|
1
| |
Sodium carbonate, anhyd. 1000 g
|
30154-70
|
1
| |
Liquid paraffin 1000 ml
|
30180-70
|
1
| |
Nitric acid 1,40 g/ml, 65%, 500 ml
|
30213-50
|
1
| |
Sulphuric acid, 95-97%, 500 ml
|
30219-50
|
1
| |
Butane burner with cartridge, 220 g
|
32180-00
|
1
| |
HEPTANE, NORMAL 1000 ML
|
31366-70
|
1
|
|
Service
