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EDTA Titration of Water. Michael Marroquin and Meg Dailey. Importance of Drinking Water. Regulation of body temperature Gives cells their shape Major component of bodily fluids Keeps skin healthy Cannot store water in our bodies. Hardness of Water. May help towards dietary needs - PowerPoint PPT Presentation
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EDTA Titration of Water
Michael Marroquin and Meg Dailey
Regulation of body temperature Gives cells their shape Major component of bodily fluids Keeps skin healthy Cannot store water in our bodies
Importance of Drinking Water
Classification ppmSoft 0-17.1Slightly Hard 17.1-60Moderately Hard 60-120Hard 120-180Very Hard 180 and above
Hardness of Water
•May help towards dietary needs•Weak inverse relation between water hardness and cardiovascular disease
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
Purpose
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
Procedure: Standardization of EDTA
Trial mL CaCl2 mL Buffer mL EDTA Molarity1 3.00 3.00 14.80 0.01032 3.00 3.00 14.50 0.01053 3.00 3.00 14.60 0.0104
Average: 0.0104
Data: Standardization of EDTA
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
Procedure: Titration of Water
The Water Bottles
Tyler Run ApartmentsTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 3.00 50.02 ppm2 3.00 25.00 2.80 46.68 ppm3 3.00 25.00 2.80 46.68 ppm4 3.00 25.00 3.00 50.02 ppmAverage: 48.35 ppmStandard Deviation: 1.93
Data: Titration of WaterDasani WaterTrial mL Buffer mL Water mL EDTA Hardness of Water
1 3.00 25.00 1.20 20.012 3.00 25.00 1.10 18.343 3.00 25.00 1.20 20.014 3.00 25.00 1.10 18.34Average: 19.18 Standard Deviation: 0.96
Little Run LodgeTrial mL Buffer mL Water mL EDTA Hardness of Water1 3.00 25.00 3.20 53.35 ppm2 3.00 25.00 3.20 53.35 ppm3 3.00 25.00 3.50 58.35 ppm4 3.00 25.00 3.10 51.68 ppm5 3.00 25.00 3.40 56.68 ppmAverage: 54.68 ppmStandard Deviation: 2.74
Susquehanna HallTrial mL Buffer mL Water mL EDTA Hardness of Water1 3.00 25.00 3.50 58.35 ppm2 3.00 25.00 3.70 61.69 ppm3 3.00 25.00 3.40 56.69 ppmAverage: 58.89 ppmStandard Deviation: 2.55
Spring GardenTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 3.50 58.35 ppm2 3.00 25.00 3.80 63.36 ppm3 3.00 25.00 3.70 61.69 ppm4 3.00 25.00 3.50 58.35 ppmAverage: 60.425 ppmStandard Deviation: 2.51
Beard HallTrial mL Buffer mL Water mL EDTA Hardness of Water1 3.00 25.00 3.10 51.68 ppm2 3.00 25.00 3.20 53.35 ppm3 3.00 25.00 3.30 55.02 ppm4 3.00 25.00 3.30 55.02 ppmAverage: 53.77 ppmStandard Devation: 1.60
Codorous HallTrial mL Buffer mL Water mL EDTA Hardness of Water1 3.00 25.00 3.00 50.02 ppm2 3.00 25.00 2.95 49.18 ppm3 3.00 25.00 3.10 51.68 ppm4 3.00 25.00 2.90 48.35 ppm5 3.00 25.00 3.00 50.02 ppmAverage: 49.86 ppmStandard Deviation: 1.24
Penn HallTrial mL Buffer mL Water mL EDTA Hardness of Water1 3.00 25.00 2.80 46.68 ppm2 3.00 25.00 2.85 47.52 ppm3 3.00 25.00 3.00 50.02 ppm4 3.00 25.00 2.80 46.68 ppmAverage: 47.725 ppmStandard Deviation: 1.58
Northside CommonsTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 3.05 50.852 3.00 25.00 3.15 52.523 3.00 25.00 3.10 51.68Average 51.68 Standard Deviation: 1.32
Manor SouthTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 2.90 48.352 3.00 25.00 2.85 47.523 3.00 25.00 2.85 47.524 3.00 25.00 2.90 48.35Average: 47.94 Standard Deviation: 0.48
Manor WestTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 4.10 68.352 3.00 25.00 4.00 66.693 3.00 25.00 3.80 63.364 3.00 25.00 3.90 65.02Average: 65.86 Standard Deviation 2.15Manor North
Trial mL Buffer mL Water mL EDTA Hardness of Water
1 3.00 25.00 3.40 56.692 3.00 25.00 3.60 60.023 3.00 25.00 3.60 60.02Average: 58.91 Standard Deviation: 1.92
Manor NortheastTrial mL Buffer mL Water mL EDTA Hardness of
Water1 3.00 25.00 3.20 53.352 3.00 25.00 3.50 58.353 3.00 25.00 3.20 53.354 3.00 25.00 3.20 53.35Average: 54.60 Standard Deviation: 2.50
Brockie Commons
Trial mL Buffer mL Water mL EDTA Hardness of Water
1 3.00 25.00 3.30 55.022 3.00 25.00 3.30 55.023 3.00 25.00 3.40 56.69Average: 55.58 Standard Deviation: 0.96
Building Average ppm ClassificationDasani Water 19.18 Slightly HardPenn Hall 47.73 Slightly HardManor South 48.35 Slightly HardTyler Run Apartments 48.35 Slightly HardCodorous Hall 49.86 Slightly HardNorthside Commons 51.68 Slightly HardBeard Hall 53.77 Slightly HardManor Northeast 54.60 Slightly HardLittle Run Lodge 54.68 Slightly HardBrockie Commons 55.58 Slightly HardSusquehanna Hall 58.89 Slightly HardManor North 58.91 Slightly HardSpring Garden 60.43 Moderately HardManor West 65.86 Moderately Hard
Summary of Data
Example of CalculationsHardness 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:
Dasani clearly had the softest water Manor West had the hardest water Drink bottled water Had some bad trials, however, overall
experiment was successful
Conclusion
