# In the woods and by the lake there was an extensive

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In the woods and by the lake there was an extensive amount of garbage consisting of food wrappers, needles, etc. If there are homeless individuals who dwell in the woods or by the lake, that potentially means that there is a chance of human waste in the lake water. These all are examples of pollutants in the water which could affect pH levels and dissolved oxygen tests. Materials 1. API ® Freshwater Master Test Kit 2. Sample jars filled with Snake Lake & Delong Lake water 3. Two small empty jars 4. Dissolved Oxygen Meter 5. Calculator 6. Deionized water 7. Writing Implements Procedure/method: Dissolved oxygen test 1. Gather materials 2. Fill one small jar with DeLong and the other with Snake lake water 3. Calibrate dissolved oxygen meter 4. Test dissolved oxygen in water with a dissolved oxygen meter

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5. Repeat step 4. 3 times per jar 6. Record data pH level test 7. Gather materials 8. Fill one small jar with DeLong and the other with Snake lake water 9. Pour jar water into 5 ml. testing tube 10. Place 3 drops of pH testing solution into each 5 ml testing tube then shake until their is a singular color. 11. Place 5 drops of high range pH if pH is over the maximum pH (7.6). 12. Observe and record data Results Dissolved Oxygen Test #1 Test #2 Test #3 Average Snake Lake 10.58 mg/L 10.59 mg/L 10.56 mg/L 10.57 mg/L Delong Lake 11.73 mg/L 8.99 mg/L 11.40 mg/L 10.71 mg/L To find the average of both dissolved oxygen tests conducted, all three tests for each lake were added and divided by three (for the three tests). An outlier for these tests would be located in test two for Delong Lake. This test was less than all the tests conducted. There is no reason as to why it was the result, the numbers kept fluctuating with Delong Lake. pH Test #1 Test #2 Snake Lake 6.6 N/A of higher range Delong Lake 7.6 With higher range: 7.4 When testing for dissolved oxygen there were no colossal changes; though the numbers that appeared on the dissolved oxygen meter seemed to fluctuate more with Delong Lake than those of Snake Lake. On the data it was conveyed with numbers going from 11.7 to 8.99 to 11.4, whereas the numbers for Snake Lake
stayed consist--in the 10 range. These numbers indicate that they are in the normal range for dissolved oxygen, yet Delong Lake had higher numbers (mg/L)--⅔ of the tests conducted--and a higher average, implying that it could support more plant life. Regarding the pH tests, the pH testing tubes were filled with both lake waters, alternating between the two. Once the pH solution landed in the Snake Lake water, it instantly turned a light green indicating that it was more on the acidic side (pH level: 6.6; anything lower than 7 is considered acidic). Amazonian fish like angelfish

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• Fall '19
• pH, snake lake, Delong lake

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