SCIENCE REPORT AMMONIUM NITRATE NH4NO3 Problem Our task was to investigate what the optimum ratio of solute to solvent that will produce the maximum cooling/heating effect? Hypothesis With a smaller quantity of water (50mls) and the same amount of Ammonium Nitrate added. After any period of time the mixture will be a cooler temperature than that of a mixture with a larger quantity of water. Variables X Water X Teaspoons X Time X Ammonium Nitrate X Thermometer X Stirring
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Pepin III initiated the usage of the silver coin. As European exploration of foreign lands intensified during the sixteenth century‚ silver earned a high-ranking position on the global market as one of the most economically valuable natural resources in the world. The availability of silver increased and its popularity prompted the opening of new European and South American mines. As more mines were established‚ European governments started to issue larger silver coins‚ lessening the usage of gold
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copper(II) nitrate is used to dissolve in a test tube filled with half distilled water. The solid copper(II) nitrate ionize in water to form copper(II) ions and nitrate ion. Hence‚ a blue solution is formed due to the blue copper(II) ion present in the solution. When excess solid is added‚ the solution will become saturated and do not allow any solid to dissolve‚ so excess solid will remain in the solution. This is shows that the equilibrium between solid and aqueous copper(II) nitrate is achieved
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ABSTRACT: Silver nanoparticles are nanoparticles of silver which are in the range of 1 and 100 nm in size. Silver nanoparticles have unique properties which help in molecular diagnostics‚ in therapies‚ as well as in devices that are used in several medical procedures. The major methods used for silver nanoparticle synthesis are the physical and chemical methods. The problem with the chemical and physical methods is that the synthesis is expensive and can also have toxic substances absorbed onto
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Puts ‘Iowa Nice’ to a Test‚ and Dead Zones‚ all share important reasons to what is happening. A huge problem that is dealing with our water is nitrates‚ which is a serious acid and is making our water very unhealthy. All of these articles each share important reasons to why nitrates are so bad and the effect it has on people. Some problems are‚ that nitrates are costing cities way too much money‚ the struggle it puts on farmers‚ and the fact it is one of the causes to eutrophication. After reading
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The results for nitrate were inconclusive‚ there are traces of nitrate in wells 15‚ 20‚ 23‚ and 21 but we couldn’t find the source. We believe that number 15 is the source but there is very little amount of pollutants in the water to make the solution turn black. Wells 15‚ 20‚ 23‚ and 21 when tested for nitrates‚ the iodine changed to a yellowish blackish color. The hypothesis was not supported‚ well number 26 did not test positive for any of the pollutants. The first well tested was well number
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Silver Atomic Number:47 Atomic Weight: 107.8682 Melting Point: 1234.93K (961.78C) Boiling Point: 2435K (2162C) Density: 10.501 grams per cubic centimetre Phase At Room Temperature: Solid Element Classification: Transition Metal Period Number: 5 Group Number: 11 Origin-: The word silver derives from the Anglo-Saxon word seolfor. Silvers chemical symbol comes from the Latin word for silver‚ argentum. History and Uses-: Silver has been in use for over 5‚000 years. Silver is obtained from
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9/15/11 AP Chemistry Dr. Isotone Lab 1: Determination of the Empirical Formula of Silver Oxide Lab Objective: In this experiment‚ the percent composition and empirical formula of silver oxide will be determined. Silver oxide will be heated until it decomposes to silver metal and oxygen‚ and the percent calculation and empirical formula can be calculated based on combining the ratios of silver and oxygen in the reaction. Summary of Lab Procedure: 1. Set up Bunsen burner on
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3: Variables Independent variable: The methods of removing lead nitrate (Pb(NO3)2) from water. There are various ways to remove lead dissolved into water. Many of them are expensive and/or very industrial. Due to my circumstances‚ I chose five that were somewhat doable. The five methods are coagulation‚ carbon filtering‚ reverse osmosis‚ ground coffee filtering‚ and distillation. Coagulation was done by using a flocculant (aluminum sulfate) that clump small‚ destabilized particles together so that
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Introduction Silver is a chemical element with atomic number 47 and symbol Ag. It is white‚ soft‚ mallable and ductile metal slightly harder than gold. Silver is extremely flexible‚ this means that it can be converted into both flat sheets and electrical wire. This makes silver is an ideal metal for all kinds of industrial use. Silver occurs in lead‚ Zinc and copper ore deposits. Lead ore is the main source of Silver. In fact‚ 75% of the resources in the world are found in association with other
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