Product details

Briggs-Rauscher reaction with Cobra4 - classical clock reaction

Briggs-Rauscher reaction with Cobra4 - classical clock reaction

Item no.: P3121660

Difficulty Expenditure of Time print
  • Description
  • Scope of Supply
  • Accessories
  • Downloads and Documents

Principle

The Briggs-Rauscher reaction is a so-called homogeneous oscillating reaction, i.e. the reaction rate of the complete process is subject to periodic fluctuations. In general, oscillating reactions can always occur when the following conditions are fulfilled: The reaction must run highly exergonic (ΔG << 0). At least one of the reaction steps must contain a positive or negative back-coupling. Such back-coupling processes occur when the result of the individual partial steps of the reaction, such as changes in temperature or concentration, act back on the rate constants of the individual partial steps of the reaction. In this way, the whole reaction becomes non-linear.

Benefits

  • Simplified implementation: all pre-settings already prepared
  • Spectacular experiment with numerous color changes

Tasks

Observer the fluctuations of the Briggs-Rauscher reaction by measuring the potential over a definite time period.

What you can learn about

  • Oscillating reactions
  • Exergonic process
  • Potential
  • Briggs-Rauscher reaction

Necessary accessories

  • Precision balance 620g/0.001g

This experiment requires a computer. Software provided.

Device Name Item no. Qty
Beaker, 600 ml, high-form 46029-00 1,00
Retort stand, h = 750 mm 37694-00 1,00
curricuLAB measureLAB 14580-61 1,00
Beaker, 150ml, low-form 46060-00 2,00
USB charger for Cobra4 Mobile-Link 2 and Wireless/USB-Link 07932-99 1,00
Magnetic stirring bar 30 mm, cylindrical 46299-02 1,00
Glass rod,boro 3.3,l=200mm, d=4mm 40485-02 1,00
Graduated cylinder 100 ml 36629-00 1,00
Hydrogen peroxide, 30%, 250 ml 31710-25 1,00
Reference electrode, AgCl 18475-00 1,00
Connecting cord, 32 A, 500 mm, red 07361-01 1,00
Beaker, 50 ml, high-form 46025-00 2,00
Lighter f.natural/liquified gases 38874-00 1,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Potassium iodate 10 31443-10 1,00
Cobra4 Wireless/USB-Link incl. USB cable 12601-10 1,00
Gloves, Neoprene, medium 46347-00 1,00
Hose clip f.12-20 diameter tube 40995-00 2,00
Boiling beads, 200 g 36937-20 1,00
Teclu burner, DIN, natural gas 32171-05 1,00
Sulphuric acid, 95-98% 500 ml 30219-50 1,00
Adapter, BNC-plug/socket 4 mm 07542-26 1,00
Safety gas tubing, DVGW, sold by metre 39281-10 1,00
Magnetic stirrer without heating, 3 ltr., 230 V 35761-99 1,00
Malonic acid 10 31551-10 1,00
Cobra4 Sensor-Unit Chemistry 12630-00 1,00
Powder spatula, steel, l=180mm 47561-00 1,00
Platinum electrode in protection tube, d = 8 mm 45206-00 1,00
Wire gauze 120x120mm, ceramic cen. 33287-03 1,00
Starch,soluble 100 30227-10 1,00
Beaker, 400 ml, low-form 46055-00 1,00
Protecting glasses, clear glass 39316-00 1,00
Pasteur pipettes, 3ml, PE, 500pcs 36616-00 1,00
Manganese-II sulphate 25 31559-25 1,00
Holder for sensors with support rod 12680-00 1,00
Spring balance holder 03065-20 2,00
Holder for two electrodes 45284-01 1,00
Right angle boss-head clamp 37697-00 2,00
Tripod, ring-d=100 mm, h=180 mm 33299-00 1,00
Water, distilled 5 l 31246-81 1,00
Document     Filesize
p3121660e.pdf Experiment guide, English 455.84 KB

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