Alyssa Erika L Borras Date Due: 18 January 2013 Date Submitted: 18 January 2013 Experiment No. 3: GRAVIMETRIC DETERMINATION OF PHOSPHORUS IN FERTILIZER SAMPLES I. Abstract The purpose of this experiment is to determinethe Phophorus content of fertilizer samples using Gravimetric Analysis. It involves dissolution of the fertilizer sample‚ precipitation and heating and cooling of the sample. Pooled standard deviations
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are often monomorphic in their development‚ and hence early determination of gender would be similarly difficult.In regards to Gallus gallus domesticus‚ the common chicken this difficulty in gender identification is quite evident in their progeny.After
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weighing bottle was used to obtain the unknown. After obtaining the unknown‚ it was placed in a desiccator until titrating began. A 250 mL beaker was used to obtain the EDTA solution. A buret was acquired and rinsed with deionized water. After rinsing with deionized water‚ the buret was then rinsed with 5-10 mL of the standardized EDTA solution. The standardized EDTA solution was then used to fill the buret. 0.14 to 0.16 g of the unknown sample was weighed out by using the weigh-by-difference technique
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DETERMINATION OF BOILING POINTS Introduction: The boiling point of a compound is the temperature at which it changes from a liquid to a gas. This is a physical property often used to identify substances or to check the purity of the compound. It is difficult‚ though‚ to find a boiling point. Usually‚ chemists can only obtain a boiling range of a 2 - 3oC accuracy. This is usually sufficient for most uses of the boiling point. Purpose: The purpose of this experiment is to determine the
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Determination of g by Free Fall Raw Data: Time (ms) ± 0.01ms Height of release of ball from the sensor plate (cm) ±0.1cm Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 0.0 0.00 0.00 0.00 0.00 0.00 15.0 180.05 179.36 178.74 180.26 180.23 30.0 244.33 244.21 244.71 243.88 245.87 45.0 300.72 301.29 300.59 301.43 301.70 60.0 348.68 348.39 348.77 349.12 348.35 75.0 390.27 390.77 389.58 391.19 390.43 This table below is the results obtained during the experiment in cm/ms. This table below is the results
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Water and Quality Contamination Rashundra Stakley SCI2-7: Dependence of Man on the Environment Instructor: Shameema Sarker October 27‚ 2014 Water and Quality Introduction. Background: According to the Millennium Development Goals Report 2012‚ 783 million people‚ or 11 per cent of the global population‚ remain without access to an improved source of drinking water. Also the United Nations has long been addressing the global crisis caused by insufficient water supply to satisfy basic
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Tap Water should be the Water of Choice Scientists have warned for years that when bottles are stored in warm and hot temperatures‚ the plastic been showed to leach chemicals into the water. There are increasing effects of polyethylene terephthalate bottles on our environment. Even the price of bottle water is increasingly outrageous. With the economy the way it is‚ why spend the money on bottle water. The EPA conducted studies on chemicals found in bottled water. Even though the studies found
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Water Availability and Water Quality Water is the most precious natural resource that exists on our planet. Every living thing needs water in order to survive. If water becomes polluted‚ it loses its value and can become a threat to our health. Although we as humans recognize this fact‚ we disregard it by polluting our rivers‚ lakes‚ and oceans. Water availability has become a great concern in our world today. Out of all the available water on earth‚ only 3 % of it is fresh water. 77% of this
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Water Pollution Control On Wednesday‚ July 10th‚ 2013‚ at approximately 12:47pm‚ Mr. Tom Anderson led our group on a tour through the City of Akron’s Water Pollution Control plant. The weather was very humid‚ with a temperature of 84 degrees F‚ but felt like 97 degrees F. On this tour we learned that the purpose of this plant (which was built in 1928) is to take all of the used water and waste from the municipal sewage lines from Akron and the surrounding suburbs and run it through a cleaning
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Importance of Water The water that we consume today is the same water since pre historical period .The importance of water has not changed; the only difference now is the purity and efficiency of it. Barbara Kingsolver‚ a famous American writer‚ explains the problems concerning water in her article‚ “Fresh Water.” Humans’ inclinations to excessively use natural assets have caused climate change and drought in many parts of the world‚ making it difficult for many people to access clean and fresh water. While
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