Final Rough draft Lab Report
Lab 2 – Water Quality and Contamination
Experiment 1: Drinking Water Quality
Bottled water is a billion dollar industry in the United States. Still, few people know the health benefits, if any, that come from drinking bottled water as opposed to tap water. This experiment will look at the levels of a variety of different chemical compounds in both tap and bottled water to determine if there are health benefits in drinking bottled water.
POST-LAB QUESTIONS
1. Develop a hypothesis regarding which water sources you believe will contain the most and least contaminants, and state why you believe this. Be sure to clearly rank all three sources from most to least contaminants.
Hypothesis = If all three types of water is tested accordingly, tap water will come back the dirtiest, compared to the bottled water being the cleanest.
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Table 1: Ammonia Test Results |
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Water Sample |
Test Results (mg/L) |
|
Tap Water |
0 |
|
Dasani® Bottled Water |
0 |
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Fiji® Bottled Water |
0 |
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Table 2: Chloride Test Results |
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Water Sample |
Test Results (mg/L) |
|
Tap Water |
0 |
|
Dasani® Bottled Water |
500 |
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Fiji® Bottled Water |
500 |
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Table 3: 4 in 1 Test Results |
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Water Sample |
Total Alkalinity (mg/L) |
Total Chlorine (mg/L) |
Total Hardness (mg/L) |
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Tap Water |
80 |
0.2 |
0 |
|
Dasani® Bottled Water |
120 |
0 |
50 |
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Fiji® Bottled Water |
80 |
0.2 |
50 |
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Table 4: Phosphate Test Results |
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Water Sample |
Test Results (ppm) |
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Tap Water |
25 |
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Dasani® Bottled Water |
10 |
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Fiji® Bottled Water |
100 |
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Table 5: Iron Test Results |
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Water Sample |
Test Results (ppm) |
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Tap Water |
0.3 |
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Dasani® Bottled Water |
0 |
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Fiji® Bottled Water |
0.15 |
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Table 6: pH Results |
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Water Sample |
Test Results |
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Tap Water |
7 |
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Dasani® Bottled Water |
4 |
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Fiji® Bottled Water |
7.5 |
2. Based on the results of your experiment, would accept or reject the hypothesis you produced in question 1? Explain how you determined this.
Accept/reject = Reject! So far, bottled water is showing a little bit more in chemicals.
3. Based on the results of your experiment, what specific differences do you notice among the Dasani®, Fiji®, and Tap Water?
Answer = Something that stuck out to me was the tap water. Strangely, the tap water came being soft, compared to the other bottles being hard. The tap water clearly shows its lower far as chemicals.
4. Based upon the fact sheets provided (links at the end of this document), do any of these samples pose a health concern? Use evidence from the lab to support your answer.
Answer = I don’t feel any of the chemicals would pose a health risk per say, but the chloride definitely scares me. It’s used to keep the water clean which is fine, but when I see 500mg for the bottled water compared to tap, it’s a bit alarming
5. Based on your results, do you believe that bottled water is worth the price? Use evidence from the lab to support your opinion.
Answer = I don’t believe bottled water is worth the price. Obviously, health is the major concern, so if we are adding chemicals into water to basically make it last for months or over a year, t doesn’t seem worth it. Drinking tap water is obviously the best solution.
**NOTE: Be sure to complete steps 1 - 32 of Lab 3, Experiment 1 (the next lab) before completing your work for this week. Lab 3 involves growing plants, and if the work is not started this week, your seeds will not have time to grow and the lab will not be finished on time.**
FACT SHEETS
Ammonia https://www.wqa.org/Portals/0/Technical/Technical%20Fact%20Sheets/2014_Ammonia.pdf
Chloride
http://www.who.int/water_sanitation_health/dwq/chloride.pdf
Phosphate
http://osse.ssec.wisc.edu/curriculum/earth/Minifact2_Phosphorus.pdf
Iron
http://www.who.int/water_sanitation_health/dwq/chemicals/iron.pdf
Alkalinity
https://www.safewater.org/PDFS/communitywatertestkit/Water_Quality_Tests.pdf
Chlorine
http://www.watertechonline.com/testing-for-chlorine-in-drinking-water/
Hardness
http://des.nh.gov/organization/commissioner/pip/factsheets/dwgb/documents/dwgb-3-6.pdf
References
Bottcher, A., & Rex, A. (2012). Environmental science student manual. Sheridan, CO: eScience Labs.
© eScience Labs, 2016