Alkyl halides experience rapid halogen exchange reactions in appropriate solvents. These substitution reactions occur according to an SN2 mechanism. Their velocity can be advantageously monitored via conductivity measurements if the ion mobilities in question clearly differ, or the number of charge carriers changes in the course of the reaction.
Measure the specific conductivities of solutions of various concentrations of sodium iodide in acetone. Subsequently determine the temporal concentrations of the co-reactants for the reaction of propyl bromide with sodium iodide (Finkelstein reaction) in acetone at 30°C. Based on the experimental data, establish the valid order of reaction and determine the rate constant.
| Materiallist (Excerpt) |
Product |
Amount |
|
Set of Precision Balance Sartorius CPA 623S and measure software, 230 V
|
49224-88
|
1
|
|
Digital conductivity meter
|
13701-93
|
1
|
|
Magnetic stirrer MR Hei-Standard
|
35750-93
|
1
|
|
Electronic temperature controller EKT Hei-Con
|
35750-01
|
1
|
|
Conductivity temperature probe Pt1000
|
13701-01
|
1
|
|
Condenser, Dimroth type GL25/12
|
35815-15
|
1
|
|
Round flask,100ml,3-n.,GL25/2GL18
|
35677-15
|
1
|
|
N-propyl bromide 250 ml
|
31756-25
|
1
|
|
Sodium iodide 50 g
|
31634-05
|
1
|
|
Stopwatch, digital, 1/100 s
|
03071-01
|
1
|
|
Supp.rod,stainl.steel,75cm,M10thr.
|
02023-20
|
1
|
|
Acetone, chem.pure 250 ml
|
30004-25
|
1
|
|
Universal clamp
|
37715-00
|
2
|
|
Crystallizing dish, boro3.3, 1000ml
|
46245-00
|
1
|
|
Spring balance holder
|
03065-20
|
1
|
|
Magn.stirring bar 25mm, ov.
|
46300-01
|
1
|
|
Support rod with hole, stainless steel, 10 cm
|
02036-01
|
1
|
|
Right angle clamp
|
37697-00
|
3
|
|
Rubber caps, pack of 20
|
02615-03
|
1
|
|
Graduated cylinder 100 ml
|
36629-00
|
1
|
|
Glass beaker DURAN®, tall, 50 ml
|
36001-00
|
1
|
|
Glass tube, straight, l=80 mm, 10/pkg.
|
36701-65
|
1
|
|
Magn.stirring bar 50mm, cyl.
|
46299-03
|
1
|
|
Cannula 0.6x60 mm, Luer, 20 pcs
|
02599-04
|
1
|
|
Spoon, special steel
|
33398-00
|
1
|
|
Syringe 10ml, Luer, 10 pcs
|
02590-03
|
1
|
|
Rubber tubing, i.d. 6 mm
|
39282-00
|
2
|
|
Powder funnel, upper dia. 65mm
|
34472-00
|
1
|
|
Hose clip, diam. 8-16 mm, 1 pc.
|
40996-02
|
4
|
|
Laboratory Experiments Physics, Chemistry, Biology andApplied Sciences, CD-ROM, incl. operating manuals
|
16502-42
|
1
|
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