Hector Buenrostro Alexys Tran Edgar Contreras Daniel Rodríguez 5th period 9 September 2013 The Mystery Powder Lab Report Introduction: One morning Ms. Mandell woke up to find a weird type of matter. It was a wired heterogeneous mixture we could tell where the solvent and solute separated. She has no idea what it is so she brought the sample to class to show us. The purpose of the lab is for us to try and figure out what makes up this heterogeneous mixture‚ by making observations on
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powdery * Zinc Sulfate- White and powdery * Boiling Chips- Tiny‚ grey and rock like Experimental Observations: Barium Iodide used- .63g Zinc Sulfate used- .45g Boling Tube with 2 boiling chips- 41.52g Barium Iodide in solution with 2 mL of deionized water looks cloudy. Zinc Sulfate in solution with 2 mL of deionized water is clear. Barium Iodide solution mixed with Zinc Sulfate solution turns milky white. After first centrifugation‚ solution separates into Barium Sulfate precipitate and
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EXPERIMENT 8 QUANTITATIVE DETERMINATION IODOMETRIC TITRATION OF COPPER CONCENTRATION IN AQUEOUS SOLUTION B Y RESULTS AND DISCUSSION Considered as moderately weak oxidizing agent‚ Iodine was used for the determination of strong reductants. Standard iodine solutions were found to have smaller electrode potentials as compared with the other oxidants‚ gaining them the advantage of imparting a degree of selectivity essential in the determination of strong reducing agents amid the presence
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Rocks containing copper compounds (such as copper carbonate) are called ‘copper ore’. Copper is extracted from copper ore by a series of chemical‚ physical‚ and electrochemical processes. Ores can be classed as ‘high grade’ or ‘low grade’ depending on the percentage of copper compounds (e.g. copper carbonate) they contain. After mining‚ the ore is crushed‚ roasted‚ smelted and then electrolysed to extract the copper. Suggested Equipment Boiling tube Samples of different carbonate ores‚ containing
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Environmental effects of copper Copper can be released into the environment by both natural sources and human actions. Examples of natural sources are wind-blown dust‚ decaying vegetation‚ forest fires and sea spray. Other examples are mining‚ metal production‚ wood production and phosphate fertilizer production. Because copper is released both naturally and through human activity it is very widespread in the environment. Copper is often found near mines‚ industrial settings‚ landfills and waste
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3rd‚ 2009 Lab Report #3: Copper Cycle Abstract: The purpose of the experiment is to cycle solid copper through a series of five reactions. At different stages of the cycle‚ copper was present in different forms. First reaction involves reaction between the copper and nitric acid‚ and copper changed from elemental state to an aqueous. The second reaction converted the aqueous Cu2+ into the solid copper (2) hydroxide. In the third reaction Cu(OH)2 decomposed into copper 2 oxide and water when heated
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An experiment to investigate the effect of temperature on the rate of reaction of the Enzyme Trypsin. Aim: This investigation was on the effect temperature has on the rate that the enzyme trypsin hydrolyses its substrate‚ a protein found in milk (casein). This investigation was conducted under controlled conditions‚ the temperature being the changeable variable. Trypsin and its substrate (powdered milk which is a source of the protein casein) were heated in a water bath. The contents of the two
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The Copper A. In the text “the Copper” Glenn Gavin tells about his experience and viewpoints 20 months after he joined the Metropolitan Police. In the text are different subjects discussed. Glenn Gavin talks about his upraise inside the family and at school‚ the role of rules‚ his choice of carrier‚ and attitude toward politics. When Gavin was a kid his parents gave him a “guiding kick up the backside every now and then” (p. 1 l. 2). For example when he “came in late” (p. 1 l.3) or if he “was
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to be relatively stable and has greater available chlorine than sodium hypochlorite (liquid bleach). Preparation It is manufactured by the calcium process: ~\mathrm{2Cl_2 + 2Ca(OH)_2\longrightarrow \ Ca(OCl)_2 + CaCl_2 + 2H_2O}. "Bleaching powder" is a mixture of calcium hypochlorite (Ca(OCl)2) and the basic chloride CaCl2‚ H2O with some slaked lime‚ Ca(OH)2. Properties Calcium hypochlorite is a yellow white solid which has a strong smell of chlorine. It is not highly soluble in water
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Report on Zinc deficiencies Zinc deficiency is the inadequate amount of zinc in the body to meet its demands. Zinc is vital to the body functions such as‚ a healthy immune system and wrongdiagnosis.com states is best known for minimizing the effects of the common cold or upper respiratory infections. It can enhance the functions of the liver‚ muscles and bones. Other functions of zinc in the body are to wound heals; aid enzyme activity; DNA production and cell division. When there is an insufficient
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