Lab 4 Week 4

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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 (after 48 hours) | |Pyrite |6 |6 | |Activated Carbon |6 |7 | |Water |6 |6 | POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal (activated carbon) on the acidity of water? a. Pyrite hypothesis = The pyrite will probably dissolve a bit and increase the ph of the water b. Coal (activated carbon) hypothesis = The activated carbon will probably increase the ph of the water as it dissolves and releases chemicals into the water 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 =REJECT: After letting the pyrite and water mixture set for 48 hours, the ph in the water sample remained the same as pure water. b. Coal (activated carbon) hypothesis accept/reject = ACCEPT: The sample of charcoal and water, after sitting for 48 hours, had a higher ph than the initial water only reading 3. Based on your data, what effect do you predict coal mining has on the environment? Answer = Coal

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