Product details

Conductivity titration with Cobra4

Conductivity titration with Cobra4

Item no.: P3060760

Experiment Type: Teacher Experiment, Laboratory Experiment

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

Principle

The electric conductivity of aqueous electrolyte solutions is determined by the type and number of charge carriers at constant temperature. Characteristic changes in conductivity are connected with changes in the ionic composition of reacting systems. These can be used in the conductiometric titration as end point indicators.

Benefits

  • Drop counter optimizes the experimental procedure
  • Accurate results by conductivity probe with integrated sensor Pt 1000
  • Simplified implementation: all pre-settings already prepared

Tasks

Using the Cobra4 system, measure the change in conductivity in the titrations of the following:

  1. approximately 0.1 molar barium hydroxide solution with 0.1 molar sulphuric acid.
  2. approximately 0.1 molar hydrochloric acid with 0.1 molar sodium hydroxide solution.
  3. approximately 0.1 molar acetic acid with 0.1 molar sodium hydroxide solution.

Other samples can alternatively be set in advance for conductiometric determination of their concentration contents.

What you can learn about

  • Electrolyte
  • Electrical conductance
  • Specific conductance
  • Ion mobility
  • Ion conductivity
  • Conductometry
  • Volumetry

Necessary accessories

  • Precision balance 620g/0.001g

Software provided. Computer not included.

Device Name Item no. Qty
Acetic acid, 1 M sol., 1000 48127-70 1,00
curricuLAB measureLAB, multi-user license 14580-61 1,00
Water, distilled 5 l 31246-81 1,00
Caustic soda sol.,0.1M 1000 48328-70 1,00
Rubber caps, 10 pcs 39275-03 1,00
Volumetric pipette, 10 ml 36578-00 2,00
Funnel, glass, top dia. 80 mm 34459-00 1,00
Holder for sensors with support rod 12680-00 2,00
Retort stand, h = 750 mm 37694-00 1,00
Volumetric flask, Borosilicate, 100 ml, IGJ12/21 36548-00 1,00
Spoon, special steel 33398-00 1,00
Cobra4 Wireless/USB-Link incl. USB cable 12601-10 2,00
Hydrochloric acid,0.1M 1000 48452-70 1,00
Weighing dishes, square shape, 84 x 84 x 24 mm, 25 pcs. 45019-25 1,00
Pipette dish 36589-00 1,00
Magnetic stirrer without heating, 3 ltr., 230 V 35761-99 1,00
Conductivity temperature probe Pt1000 13701-01 1,00
Acetic acid, 0.1 M sol., 1000 48126-70 1,00
Right angle boss-head clamp 37697-00 3,00
Volumetric flask 250 ml, IGJ14/23 36550-00 1,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Cobra4 Sensor-Unit Conductivity+ 12632-00 1,00
Sulphuric acid,0.5M 1000 48462-70 1,00
Beaker, Borosilicate, low form, 250 ml 46054-00 1,00
Pasteur pipettes, 250 pcs 36590-00 1,00
Barium hydroxide 250 30034-25 1,00
Burette clamp, roller mount., 2 pl. 37720-00 1,00
Volumetric pipette, 5 ml 36577-00 3,00
Funnel, glass, top dia. 50 mm 34457-00 1,00
Cobra4 Sensor-Unit Drop Counter 12636-00 1,00
Magnetic stirring bar 30 mm, cylindrical 46299-02 1,00
Pipettor 36592-00 1,00
Volumetric flask, Borosilicate, 50 ml, IGJ12/21 36547-00 1,00
Standard solution 1413µS/cm(25°C), 460ml 47070-02 1,00
Document     Filesize
p3060760e.pdf Experiment guide, English 653.9 KB

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