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notes- Spring 2006 - Sparks

notes- Spring 2006 - Sparks - H solute substances dissolve...

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8/30/06 Chapter 5 Water A. Your PAD Number for this class is 52. Please write this number down you will need it in class. B. 70% of earth is made of water a. 97.4% is ocean (salt water) b. 2.59% freshwater but is frozen as ice cap C. less than 1% is water we can drink either underwater or lake D. Adult is 60% and Children is 75% E. You can go roughly 5-7 days with no water F. Possible contaminations in water a. Microbial contaminants: such as viruses and bacteria b. Inorganic contaminants: salts and metals c. Pesticides and herbicides: variety of sources such as agriculture, storm water, runoff, and residential uses d. Organic chemicals: industrial or petroleum use e. Radioactive materials: natural occurring G. solvent : substances capable of dissolving other substances (usually greater proportion)
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Unformatted text preview: H. solute : substances dissolve in solvent I. solution : resulting mixture J. Aqueous solution : solution with water as the solvent Minerals Composition in Tap Water, mg/L Calcium 66 Sulfates 42 Magnesium 24 Chlorides 48 Sodium 18 Nitrates 6 Florides 1 Mineral Composition of Evian, mg/L Calcium 78 Bicarbonates 357 Magnesium 24 Sulfates 10 Silica 14 Chlorides 4 Nitrates (N) 1 A. Measuring concentrations of solutes a. Percent i. Always percent by mass unless otherwise noted ii. Ppm, ppb iii. Molarity Hw 1 could be completed through # 1 09/01/06 A. 1 ppm (1 gram / 10^6 grams) for Liquids a. 1 ppm = 1 mg/L...
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