Acidity changes of à watercourse

Numéro d´article: P1520862


The pH value (a measure of the concentration of hydrogen ions) in running waters depends on the geological conditions, the pollution load that is caused by agricultural production, and on plant activities. This experiment shows how the pH value of a stream changes even at a short distance and just a few kilometres away from the spring.


  • Experiment is part of an experiment set with numerous experiments in ecology
  • Universal handheld measurement device can also be used for other measurement parameters relevant in ecology, biology and chemistry
  • Outdoors measurement possible, for mobile use
  • Graphical display of measurement data
  • Data can be saved on SD memory card
  • All data can be transferred onto a computer for data analysis
  • Data analysis software can be freely distributed


  1. Measurement of the pH values of a watercourse at different locations
  2. Comparison of the pH values
  3. Comparison with other exemplary water bodies

What you can learn about

  • Factors influencing the pH value of water bodies
  • pH decrease effect of plant activity
  • pH value of rainwater


Liste du matériel (extrait) Articles Montant
Cobra4 Mobile-Link 2 enregistreur mobile avec carte SD, accus, câble USB et logiciel 12620-10 1
Cobra4 capteur pH, connexion BNC 12631-00 1
Tablettes tampon pH 4, 100 30281-10 1
Tablettes tampon pH 10, 100 30283-10 1
Gaine protection pour électrodes pH 37651-15 1
Eau distillée 5 l 31246-81 1
Pissette 500 ml, plastique 33931-00 1
Becher forme basse 250ml, plastique 36013-01 2

Littérature pour cet article comme suit:

Title Produit Langue
Handbuch Schüler- und Lehrerversuche Cobra4, Physik, Chemie, Biologie, Alltagsphänomene, TESS und DEMO 01330-01 DEU
TESS and Demo advanced Manual Cobra4 Physics, Chemistry, Biology, Everyday Science 01330-02 ENG
Handbuch Schülerversuche Cobra4 Umwelt und Freiland, TESS advanced Biologie 12622-01 DEU
TESS advanced Applied Sciences manual Cobra4 Environment and Outdoors 12622-02 ENG
Schülerversuche Umwelt und Freiland mit Cobra4, Gerätesatz für 4 Arbeitsgruppen, TESS advanced Biologie 12626-88
Schülerversuche Umwelt und Freiland für Tablets, Gerätesatz für 4 Arbeitsgruppen, TESS advanced Biologie 15626-88

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Numéro d´article: P1520862

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