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Temperature dependence of conductivity with Cobra4

Temperature dependence of conductivity with Cobra4

Item no.: P3060560

Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
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The electrical conductivity of an electrolytic solution is dependent not only upon the type and concentration of the electrolytes, but also other state values. Thus, an increase in conductivity is generally observed with an increase in temperature. This is fundamentally due to the exponential decrease of the solutions's viscosity. In aqueous solutions a limit is reached at approximately 90 °C. Above this temperature the conductivity again decreases.


  • Experimental procedure without dangerous chemicals
  • Simplified implementation: all pre-settings already prepared
  • Accurate results by conductivity probe with integrated sensor Pt 1000


Determine the temperature dependence of the conductivity of a 10% sodium chloride solution from 20 °C to approximately 60 °C.

What you can learn about

  • Electrolytic resistance
  • Conductance
  • Specific and molar conductivity
  • Ion mobility
  • Equivalent conductance at infinite dilution
  • Kohlrausch's law
  • Ostwald's law of dilution
  • Transference numbers
  • Viscosity

Necessary accessories

  • Precision balance 620g/0.001g


Document     Filesize
p3060560e.pdf Experiment guide, English 328.03 KB

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