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Charge transport in liquids (Drying oven required!) (withthe Cobra3 Chem-Unit)

Product No: P3060240

Principle:

A potential difference between two electrodes in a liquid causes the flow of a current in the liquid. This current depends on the potential drop across the liquid and its conductivity. The measurement of the conductivity of electolyte solutions yields knowledge about charge transport in liquids.

Tasks:

Measure the change in conductivity caused by diluting a 0.1 molar potassium chloride solution with distilled water.
Measure the conductivity of an aqueous potassium chloride solution at different tempereatures.
Explain the observed effects.

What you can learn about:

Electrolyte solutions
Conductivity
Ionic migration

Materiallist (Excerpt)	Product	Amount
Set of Analytical Balance Sartorius CPA 224S and measure software, 230 V	49221-88	1
Cobra3 Chem-Unit, USB	12153-50	1
Magnetic stirrer MR Hei-Standard	35750-93	1
Conductivity probe K1	18151-02	1
Desiccator, wertex, diam. 150 mm	34126-00	1
Software Cobra3 Chem-Unit	14520-61	1
Immers. probe NiCr-Ni, teflon, 200°C	13615-05	1
Power supply 12V / 2A	12151-99	1
Burette, lateral stopcock, Schellbach, 50 ml, graduations 0, ml	36513-01	1
Silica gel,orange,granular,500 g	30224-50	1
Holder for two electrodes	45284-01	1
Burette clamp, roller mount.,2pl.	37720-00	1
Water, distilled 5 l	31246-81	1
Silicon grease Molykote, 50 g	31863-05	1
Volumetric flask 1000ml, IGJ24/29	36552-00	1
Porcelain plate f.desiccator150mm	32474-00	1
Potassium chloride 250 g	30098-25	1
D (+)-Sucrose 100 g	30210-10	1
Data cable, plug/ socket, 9 pole	14602-00	1
Supp.rod stainl.st.,50cm,M10-thr.	02022-20	1
Stand.solu.1413æS/cm(25øC), 460ml	47070-02	1
Pasteur pipettes, 250 pcs	36590-00	1
Spring balance holder	03065-20	1
Weighing dishes, square shape, 84 x 84 x 24 mm, 25 pcs.	45019-25	1
Right angle clamp	37697-00	1
Cristallizing dish,boro3.3, 320ml	46243-00	1
Rubber caps, 10 pcs	39275-03	1
Glass beaker DURAN®,tall, 150 ml	36003-00	2
Glass beaker DURAN®, tall, 250 ml	36004-00	1
Funnel, glass, top dia. 80 mm	34459-00	1
Spoon, special steel	33398-00	1
Wash bottle, plastic, 500 ml	33931-00	1
Magn.stirring bar 15mm, cyl.	46299-01	1
Glass rod,boro 3.3,l=200mm, d=5mm	40485-03	1
Laboratory Experiments Physics, Chemistry, Biology andApplied Sciences, CD-ROM, incl. operating manuals	16502-42	1