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Technical data


Conductivity titration with Cobra SMARTsense

Article no: P3060767

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.

Learning objectives

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

Necessary accessories

  • Precision balance 620g/0.001g

Software provided. Computer not included.

Scope of delivery

Cobra SMARTsense Dropcounter - Sensor for measuring drops and pH during titration 0 ... ∞ / 0 ... 14 (Bluetooth + USB) 12923-00 1
Cobra SMARTsense - Conductivity, 0...20000 µS/cm, 0...60°C (Bluetooth) 12922-01 1
USB charger for Cobra SMARTsense and Cobra4 07938-99 1
measureAPP - the free measurement software for all devices and operating systems 14581-61 1
Holder for Cobra SMARTsense 12960-00 2
Magnetic stirrer without heating, 3 ltr., 230 V 35761-99 1
Magnetic stirring bar 30 mm, cylindrical 46299-02 1
Retort stand, h = 750 mm 37694-00 1
Right angle boss-head clamp 37697-00 3
Burette clamp, roller mount., 2 pl. 37720-00 1
Burette, lateral stopcock, Schellbach, 25 ml MAU-24022021 1
Beakers, Boro, low form, various sizes 46054-00 1
Weighing dishes, square shape, 84 x 84 x 24 mm, 500 pcs. 45019-50 1
Volumetric flasks, Boro, various sizes 36547-00 1
Volumetric flasks, Boro, various sizes 36548-00 1
Volumetric flasks, Boro, various sizes 36550-00 1
Bulb pipettes, various sizes 36577-00 3
Bulb pipettes, various sizes 36578-00 2
Pipettor 36592-00 1
Pipette dish 36589-00 1
Funnels (glass), Boro, various sizes 34457-00 1
Funnels (glass), Boro, various sizes 34459-00 1
Spoon, special steel 33398-00 1
Wash bottle, plastic, 500 ml 33931-00 1
Pasteur pipettes, 250 pcs 36590-00 1
Rubber caps, 10 pcs 39275-03 1
Sulphuric acid,0.5M 1000 ml 48462-70 1
Hydrochloric acid,0.1M 1000 ml 48452-70 1
Acetic acid, 1 M sol., 1000 ml 48127-70 1
Caustic soda sol.,0.1M 1000 ml 48328-70 1
Barium hydroxide 250 g 30034-25 1
Water, distilled 5 l 31246-81 1
Standard solution 1413µS/cm(25°C), 460ml 47070-02 1

PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10 – 37079 Göttingen – Germany
www.phywe.com