How does phosphate affect the oxygen level of water



Abstract (sample)

How does phosphate affect the oxygen level of water? This study was conducted to try to determine which type of water’s oxygen level increased the most with the addition of phosphate. It was hypothesized that if phosphate is added to different types of water (rain, distilled, and lake), then the oxygen level of all three types of water will increase after the addition of phosphate with the oxygen level of the rain water increasing more than that of the lake and rain water. The manipulative variable was the type of water, and the responding variable was the oxygen level. First, phosphate was added to the different types of water. Then, the samples were tested for their oxygen levels. After completing the experiment, it was found that the average oxygen level of rain water was 49.9 mg/L without phosphate and 50.06 mg/L with 10 mL of phosphate added. The lake water’s average oxygen level was 44.93mg/L and 45.7 mg/L with phosphate. The distilled water’s oxygen level was 47.82 mg/L without phosphate and 48.46 mg/L with phosphate. These results supported the hypothesis; however, distilled water increased in oxygen level the most with the addition of phosphate rather than the predicted rain water. To further investigate this study, phosphate could be added to other types of water to determine if it altered the oxygen level. This knowledge would be beneficial to marine biologist in their study of aquatic environments.

Abstract must include:

1. Question

2. What you hoped to learn

3. Hypothesis

4. Variables

• Manipulated

• Responding

5. Procedures

6. Conclusion

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