Product details

The empirical formula of methane, ethane and propane

The empirical formula of methane, ethane and propane

Item no.: P3110900
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Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
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A quiescent eudiometer is inserted into the glass jacket and the glass jacket is filled with cold water. Gas mixtures composed of hydrocarbons and oxygen are injected into the eudiometer and burn there continuously at the constant sparking of the ignition spark gap. The water formed by the reaction condenses on the cool walls of the eudiometer. For this reason, the volume between the moving plunger and the fixed plunger with the ignition system after combustion is smaller than the volume of the gas mixture originally injected. In a second part of the experiment, the eudiometer in the glass jacket is heated up to over 100°C. The water formed during combustion can no longer condense on the hot eudiometer walls. In most cases, even after conversion to standard conditions, the volume recorded then is greater than the volume of the gas that was injected. The easiest way to convert the volumes to standard conditions is with a nomogram. The measurement data obtained in this way can be used to derive the empirical formulas of gaseous hydrocarbons experimentally.


Investigate the chemical formula for methane, ethane and propane.



  • Glass jacket system easily expandable
  • Safe and controlled test procedure by slow eudiometer
  • Practical gas bar for storing the gases

What you can learn about

  • Stoichiometry
  • Chemical formula
Device Name Item no. Qty
Fine control valve 33499-00 1,00
Cobra4 hand-held pressure and temperature measuring instrument, Cobra4 Mobile-Link 12736-01 1,00
Compressed gas, methane, 12 l 41772-08 1,00
Right angle boss-head clamp 37697-00 2,00
Power regulator, 230 V, with phase controlled modulator 32286-93 1,00
Cannula 0,45x13 mm, Luer, 20 pcs 02598-04 1,00
Steel cylinder oxygen, 2 l, filled 41778-00 1,00
Wrench for steel cylinders 40322-00 1,00
Funnel, glass, top dia. 50 mm 34457-00 1,00
PHYWE high voltage supply unit with digital display, 10 kV 13673-93 1,00
Magnet, d = 10 mm, l = 200 mm 06311-00 1,00
Support base DEMO 02007-55 1,00
Compressed gas, ethane, 14 g 41772-09 1,00
Universal clamp 37715-00 2,00
Spoon, special steel 33398-00 1,00
Beaker, 250 ml, high-form 46027-00 1,00
Gas bar 40466-00 2,00
Graduated vessel, 1 l, with handle 36640-00 1,00
Water, distilled 5 l 31246-81 1,00
Connecting cord, 30 kV, 1000 mm 07367-00 2,00
Support rod, stainless steel, l = 250 mm, d = 10 mm 02031-00 2,00
Compressed gas, propane, 7 l 41772-10 1,00
Lab thermometer,-10..+150C 38058-00 2,00
Reducing valve f.oxygen 33482-00 1,00
Glass jacket 02615-00 1,00
Magnetic stirring bar 30 mm, cylindrical 46299-02 1,00
Hose clip, diam. 8-16 mm, 1 pc. 40996-02 2,00
Boiling beads, 200 g 36937-20 1,00
Heating apparatus for glass jacket system 32246-93 1,00
Syringe 20ml, Luer, 10 pcs 02591-03 1,00
Table stand for 2 l steel cylinders 41774-00 1,00
Silicone tubing i.d. 7mm, 1 m 39296-00 3,00
Base plate for support base DEMO 02007-01 1,00
Document     Filesize
p3110900e.pdf Experiment guide, English 285.7 KB

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