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Sci 207 Wk 4 Lab

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Lab 4 – Energy Sources and Alternative Energy

Experiment 1: The Effects of Coal Mining

|Table 1: pH of Water Samples |
|Water Sample |Initial pH |Final pH (24-48 hours) |
|Pyrite |6 |4 |
|Activated Carbon |6 |7 |
|Water |6 |6 |

POST LAB QUESTIONS

1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?

a. Pyrite hypothesis = If pyrite is introduced to the water, then it will be more acidic.

b. Coal hypothesis = If coal is introduced to the water, then the ph level will stay the same.

2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.

a. Pyrite hypothesis accept/reject = I accept my hypothesis because after the pyrite was introduced to the water the level of ph dropped to 4 making the water more acidic.

b. Coal hypothesis accept/reject = I reject my hypothesis because the ph level rose slightly making it less acidic after the coal was introduced to the water sample.

3. Based on your data, what effect do you predict coal mining has on the environment?

Answer = Based upon my data I predict that coal mining could end up harming the environment. I believe

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