Acid Rock Drainage

Xperiment

Material:

  • 50ml Falcon tubes
  • Test tubes

 

  • Pyrite (coarse-grained)
  • Universal indicator (liquid)
  • Distilled water
  • Fill the tubes halfway each as follows:
    Tube 1: tap water
    Tube 2: approx. 1 cm high pyrite and tap water
    Tube 3: distilled water
    Tube 4: approx. 1 cm high pyrite and distilled water
  • Close the tubes and shake everything well. Then let everything stand for about 5 minutes.
  • Fill a test tube approx. 2 cm high with the solution from tube 1, into a second test tube approx. 2 cm high with the solution from tube 2, etc.
  • Add 2 drops of the universal indicator to each test tube and swirl gently.