Purpose: The purpose of this lab was to determine the freezing point of pure water‚ the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1‚ the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to
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Deionized Water vs. Distilled Water Deionized and distilled waters are both processed forms of water. Deionized water is produced by filtering water to the point where it is free of ions. This ion-free water will strip ions from surrounding material‚ acting like a super-solvent. This is often used in semiconductor and other high-tech processing as a "soft" solvent and relatively cheap cleaning fluid. Distilled water is most often produced by vaporizing less pure source water (tap‚ salt or even
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Source for Tap vs Bottled water http://responsibility-project.libertymutual.com/blog/the-bottle-vs-tap-debate-revs-up?src=keyword_s=ggl_K=tap%20water_C=Responsibility_G=BottleVsTap_Water_M=b&K_CLICKID=32f700e1-f23a-6529-9a6d-00001206db72#fbid=OQta-fwSm5-&src=keyword_s http://scienceblogs.com/gregladen/2008/06/30/do-you-drink-bottled-water/ http://voices.yahoo.com/cokes-dasani-pepsis-aquafina-not-pure-spring-water-474872.html?cat=69 http://www.health.state.mn.us/divs/eh/water/factsheet/com/bottledwater
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Water Treatment In South Africa: Is South Africa the last to know about the Growth of Technology? Group B: Alex Afonso Bonney Mankatah Patrick Marrero Damaris Morales Daniel Occhipinti Debora Robinson HUMN 432: Technology‚ Society‚ & Culture Professor John Frye February 14‚ 2012 Table of Contents Abstract 3 1. Debora Robinson 4 Introduction 4 History of South Africa 4 Description of Technology 7 History of Technology
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needs water to survive. Water is our most important resource that is required to ensure our survival. This resource is something that we use every day in our lives and it serves many different purposes. We use water to take showers‚ to flush the toilet‚ cook dinner‚ to drink‚ and to clean. Water is not only used for our domestic needs‚ or wants but it is used in agriculture‚ industries‚ transportation‚ and as an alternative energy source (Lenntech‚ 2008). Life would be impossible without water. All
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Water is determined by the amounts and kind of suspended and dissolved substances in the water‚ degree of alkalinity (pH)‚ temperature‚ colour and smell‚ and the company of undesirable microorganisms. In this experiment‚ we are explaining whether bottled water is more pure than tap water. For this experiment‚ hypothesis is which water is more pure bottled or taps water. To test the experiment we have used the equipment like bottled water‚ tap water and water test kit. In the research‚ it has been
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and Nitrite-Nitrogen in Drinking Water Nitrate may be naturally occurring‚ although its presence in drinking water is more often associated with contamination by excessive use of fertilizers (both inorganic and organic)‚ in addition to inappropriate farming practices and sewage. The high nitrate level in drinking water is also associated with the simultaneous presence of bacterial contamination (World Health Organisation‚ 1996). The primary health hazard from drinking water with nitrate-nitrogen
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Water pollution is the contamination of water bodies such as lakes‚ rivers‚ oceans and beaches. This occurs when large factories dump their waste products into the water. Water has the ability to carry many pathogens and bacteria. Because of this‚ water is responsible for many deaths and illnesses. This fact was discovered a long time ago when many people fell sick‚ and after tests‚ it was realized this was because of the drinking water. People‚ even back in the ancient times‚ would suddenly become ill
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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Conserving water can greatly limit the negative impact we have on the environment. By thinking conscientiously and creatively‚ we can make sure that everyone has enough water‚ while also minimizing the energy we use to bring it to our faucet or garden hose. Plus‚ using water wisely can lower many water bills. At Urban Times‚ it has been high on our agenda to bring more awareness to the increasing scarcity of water. This infographic‚ brought to us by Seametrics‚ illustrates that our water consumption is
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