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Michael Marroquin and Meg Dailey. Regulation of body temperature Gives cells their shape Major component of bodily fluids Keeps skin healthy Cannot store.

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Presentation on theme: "Michael Marroquin and Meg Dailey. Regulation of body temperature Gives cells their shape Major component of bodily fluids Keeps skin healthy Cannot store."— Presentation transcript:

1 Michael Marroquin and Meg Dailey

2 Regulation of body temperature Gives cells their shape Major component of bodily fluids Keeps skin healthy Cannot store water in our bodies

3 Classificationppm Soft0-17.1 Slightly Hard17.1-60 Moderately Hard60-120 Hard120-180 Very Hard180 and above May help towards dietary needs Weak inverse relation between water hardness and cardiovascular disease

4 Determine the hardness of water in samples taken from campus apartments and dorms Determine which building has the hardest water Determine which building has the softest water Determine if bottled water is more soft than samples

5 Prepare EDTA solution by placing 1.8613 grams of EDTA and 8 mL of buffer in a 500 mL flask and diluting to the mark Prepare a calcium chloride solution by placing 0.5005 grams of CaCO3 and 100 mL of 0.1 M HCl in a beaker and mixing completely Place 3 mL of calcium chloride solution, 3 mL buffer, and 4 drops of calmagite indicator and titrate with EDTA Determine molarity of EDTA

6 TrialmL CaCl2mL BuffermL EDTAMolarity 13.00 14.800.0103 23.00 14.500.0105 33.00 14.600.0104 Average: 0.0104

7 Obtain water samples from dorms and apartments on campus Place 25 mL of water, 3 mL of buffer, and 4 drops of calgamite indicator in a 250 mL Erlenmeyer flask Titrate water with EDTA Repeat until three good trials are obtained Repeat for each dorm and apartment

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10 Tyler Run Apartments TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.0050.02 ppm 23.0025.002.8046.68 ppm 33.0025.002.8046.68 ppm 43.0025.003.0050.02 ppm Average: 48.35 ppm Standard Deviation: 1.93 Dasani Water TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.001.2020.01 23.0025.001.1018.34 33.0025.001.2020.01 43.0025.001.1018.34 Average:19.18Standard Deviation:0.96

11 Little Run Lodge TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.2053.35 ppm 23.0025.003.2053.35 ppm 33.0025.003.5058.35 ppm 43.0025.003.1051.68 ppm 53.0025.003.4056.68 ppm Average: 54.68 ppm Standard Deviation: 2.74 Susquehanna Hall TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.5058.35 ppm 23.0025.003.7061.69 ppm 33.0025.003.4056.69 ppm Average: 58.89 ppm Standard Deviation: 2.55

12 Spring Garden TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.5058.35 ppm 23.0025.003.8063.36 ppm 33.0025.003.7061.69 ppm 43.0025.003.5058.35 ppm Average: 60.425 ppm Standard Deviation: 2.51 Beard Hall TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.1051.68 ppm 23.0025.003.2053.35 ppm 33.0025.003.3055.02 ppm 43.0025.003.3055.02 ppm Average: 53.77 ppm Standard Devation: 1.60

13 Codorous Hall TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.0050.02 ppm 23.0025.002.9549.18 ppm 33.0025.003.1051.68 ppm 43.0025.002.9048.35 ppm 53.0025.003.0050.02 ppm Average: 49.86 ppm Standard Deviation: 1.24 Penn Hall TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.002.8046.68 ppm 23.0025.002.8547.52 ppm 33.0025.003.0050.02 ppm 43.0025.002.8046.68 ppm Average: 47.725 ppm Standard Deviation: 1.58

14 Northside Commons TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.0550.85 23.0025.003.1552.52 33.0025.003.1051.68 Average51.68Standard Deviation:1.32 Manor South TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.002.9048.35 23.0025.002.8547.52 33.0025.002.8547.52 43.0025.002.9048.35 Average:47.94Standard Deviation:0.48

15 Manor West TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.004.1068.35 23.0025.004.0066.69 33.0025.003.8063.36 43.0025.003.9065.02 Average:65.86Standard Deviation2.15 Manor North TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.4056.69 23.0025.003.6060.02 33.0025.003.6060.02 Average:58.91Standard Deviation:1.92

16 Manor Northeast TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.2053.35 23.0025.003.5058.35 33.0025.003.2053.35 43.0025.003.2053.35 Average:54.60Standard Deviation:2.50 Brockie Commons TrialmL BuffermL WatermL EDTAHardness of Water 13.0025.003.3055.02 23.0025.003.3055.02 33.0025.003.4056.69 Average:55.58Standard Deviation:0.96

17 BuildingAverage ppmClassification Dasani Water19.18Slightly Hard Penn Hall47.73Slightly Hard Manor South48.35Slightly Hard Tyler Run Apartments48.35Slightly Hard Codorous Hall49.86Slightly Hard Northside Commons51.68Slightly Hard Beard Hall53.77Slightly Hard Manor Northeast54.60Slightly Hard Little Run Lodge54.68Slightly Hard Brockie Commons55.58Slightly Hard Susquehanna Hall58.89Slightly Hard Manor North58.91Slightly Hard Spring Garden60.43Moderately Hard Manor West65.86Moderately Hard

18 Hardness of Water Using Tyler Run Apartments Trial 1: Average of Hardness of Water Using Tyler Run Apartments: Standard Deviation of Hardness of Water Using Tyler Run Apartments:

19 Dasani clearly had the softest water Manor West had the hardest water Drink bottled water Had some bad trials, however, overall experiment was successful


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