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SCI 207 WEEK 4 LAB 4 ENERGY SOURCES

SCI 207 WEEK 4 LAB 4 ENERGY SOURCES

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SCI 207 WEEK 4 LAB 4 ENERGY SOURCES

Lab 4 – Experiment 1: The Effects of Coal Mining

Table 1: pH of Water Samples

Water Sample

Initial pH

Final pH

Pyrite

5

5

Activated Carbon

5

7

Water

5

5

 

Hypothesis: The beaker with only water would be clear the carbon would turn black when added and the other one will turn grey.

Post-Lab Questions

1.     Restate your hypothesis. Was it confirmed or denied? How do you know?

The beaker with only water would be clear the carbon would turn black when added and the other one will turn grey. The beaker with water stayed clear so that was confirmed. The beaker that the carbon was added to did not turn black so that was denied. I know due to the carbon sank to the bottom and some floated on top. The third beaker did not turn grey. that was also denied. The pyrite sank to the bottom with a little floating at the surface of the water.

1.     What, if any, change did you observe within your water samples?

The changes that I observed was that the pyrite was at the bottom and a handful of the particles formed little balls. The water was a light shade of grey. The Carbon stayed mostly on the bottom with a handful of them on top of the surface and the water had a tint of black. The water remained clear but had air bubbles in the beaker.

What type of substance formed in

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