Solution-Effect of pyrite and coal on the acidity of water | Quick Homework Help

Lab 4 – Energy Sources and Alternative Energy

Experiment 1: The Effects of Coal Mining

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

POST LAB QUESTIONS

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

a. Pyrite hypothesis =

b. Coal hypothesis =

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 =

b. Coal hypothesis accept/reject =

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

Answer =

4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.

Answer =

Experiment 2: Solar Energy

Table 2: Solar Energy Experiment Results
Environmental Descriptor/Variable	Observations (Each should be compared against direct subnlight)
Weather of the Day	Sunny, 70 degrees, winds NW@ 6 mph
Motor speed in direct sunlight	Medium
Motor speed at 45 degree angle	Medium
Motor speed under reflectors	Medium
Motor speed with 25% shaded	Medium
Motor speed with 50% shaded	Medium
Motor speed with 75% shaded	Medium
Motor speed under red filtration	Medium
Motor speed under blue filtration	Medium
Motor speed under green filtration	Medium
Motor speed under yellow filtration	Medium

Post-Lab Questions

1. Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 variables tested?

Direct vs indirect hypothesis =

Direct vs reflected hypothesis =

Direct vs shaded hypothesis =

Direct vs filtered hypothesis =

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.

Direct vs indirect accept/reject =

Direct vs reflected accept/reject =

Direct vs shaded accept/reject =

Direct vs filtered accept/reject =

3. Does increased exposure to the sun’s light produce more current? Explain how you know this based on your data?

Answer =

4. How could you increase the electricity generated by a solar cell during the day, when the sun’s angle is constantly changing?

Answer =

5. Based on your data, could aIDing filters to solar panels increase the solar energy produced? Explain how you know this.

Answer =

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