soil PH
The PH level of soil is tested by adding barium sulfate to a sample of the sediment, then applying an indicator solution which will change colour according the the acidity/alkalinity of the substrate. Alternatively a PH probe can be used which is a device that is placed in the soil and returns a reading of the indicated PH.
Materials:
- Soil sample
- Universal indicator colour chart
- Indicator solution
- Barium sulfate
- Petri dish
- Dropper
Method:
1. Obtain a sample of sediment and place in in the petri dish.
2. Add barium sulfate to the
3. Using a dropper, add 2-5 drops of indicator solution to the substrate.
4. Wait 30 seconds to allow the reaction to take place
5. Compare the colour presented on the soil surface to the universal indicator chart.
6. Determine the Alkalinity/Acidity of the substrate.
7. Record your results
The substrate tested during this field study returned a PH of 5 which fell short of the average of 5.5-8.
Materials:
- Soil sample
- Universal indicator colour chart
- Indicator solution
- Barium sulfate
- Petri dish
- Dropper
Method:
1. Obtain a sample of sediment and place in in the petri dish.
2. Add barium sulfate to the
3. Using a dropper, add 2-5 drops of indicator solution to the substrate.
4. Wait 30 seconds to allow the reaction to take place
5. Compare the colour presented on the soil surface to the universal indicator chart.
6. Determine the Alkalinity/Acidity of the substrate.
7. Record your results
The substrate tested during this field study returned a PH of 5 which fell short of the average of 5.5-8.