Worksheet #1 identifiera ____________________ 1. What does molarity mean? Number of moles of solute 1 liter solution 2. What is the molarity of a solution that contains 4.53 moles of lithium nitrate in 2.85 liters of solution? 4.53 mol LiNO3 = 1.59 M LiN03 2.85 L soln 3. What is the molarity of a solution that contains 0.00372 moles hydrochloric acid in 2.39 x 10-2 liters of solution?
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learned a lot about our solutions. For the first test‚ chloride anion‚ we received positive results from A and C. This is because they had chloride anions present and when mixed with AgNO3 and HNO3 the chloride ion solutions are used because silver nitrate is insoluble in HNO3. During the acetate anion test we had a positive result for solution D that proved the presence of the acetate ion. This reaction was from one drop of concentrated sulfuric acid and 1ml of ethanol and then required heating to
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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autotrophic ammonia oxidizing bacteria (AOB)‚ the bacteria that changes Ammonia to Nitrate. Inhibitors also stop the de-nitrification of Nitrate into Nitrous oxide (N2O); a greenhouse gas‚ decreasing loses of Nitrogen in the soil as well as preventing large amounts of greenhouse gases to emit‚ indirectly preventing algae blooms by stopping climate and meteorological changes in the Earths biosphere. Keeping the N in an Ammonium state reduces the mobility of Nitrogen‚ making it less vulnerable to leaching
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There are three groups of explosives chemical/mechanical/nuclear. In 1955‚ modern high explosives were developed. Explosives such as nitrate-fuel oil mixtures or ANFO and ammonium nitrate-base water gels now account for seventy percent of the explosive market. Explosives can contain a number of toxic substances‚ such as sulfur‚ perchlorates and nitrates. The proper disposal of hazardous substances such as these is important to prevent contamination of the air‚ water or soil. The major use
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Ecosystem is a community of living organisms (plants‚ animals and microbes) in conjunction with the nonliving components of their environment (things like air‚ water and mineral soil)‚ interacting as a system. These components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organisms‚ and between organisms and their environment‚ they can come in any size but usually encompass specific‚ limited spaces (although
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how much potassium _ __nitrate coin be dissoiu$tl ^n 30D.g of water? ------W- ’1 80 70 ...- O --60 0 5© 40 4. Which salt shows the least change 30 In solubility from 0° - 100° C? 20 10 At 30° C‚ 90 g of sodium nitrate Is 0 20 30 40 50 60 70 80 90 100 Temperature (0 °C) dissolved in 100 g of water. Is this solution saturated ‚ unsaturated or supersaturated? tat r 6. A saturated-solution-of-potassium chlorate is formed from one hundred grams of water
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16. Pure nitrogen combines directly with an active metal to form a - Nitride 17. In a sample of solid Al(NO3)3‚ the ratio of aluminum ions to nitrate ions is - 1:3 18. In a sample of solid calcium phosphate Ca3(PO4)2‚ the ratio of calcium ions to phosphate ions is - 3:2 19. What is the total number of atoms in (NH4)2SO4? - 15 20. What is the total number of oxygen atoms present in one unit of Mg(ClO3)2? - 6 21. What is the total number of atoms of oxygen in the formula Al(ClO3)3.6H2O?
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suitable conditions necessary for the detection process and the reasons for such conditions. II. Methodology A. Materials and Apparatus The chemical used in the experiment are as follows: HCl‚ sodium ions‚ ammonium carbonate‚ barium nitrate‚ acetic acid‚ potassium chromate‚ ammonium hydroxide and potassium oxalate. The apparatus used include spot plates/watch glass‚ nichrome wire‚ alcohol lamp‚ salt‚ water and stirring rod. B. Procedure We obtain a few crystals then each of the salts from
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conditions necessary for the detection process and the reasons for such conditions Introduction Procedure: 1. 3 test tube labeled 1‚2‚3 was obtained 2. 10 drops of 0.3M lead nitrate solution was placed to TT 1 3. 10 drops of 0.5M silver nitrate solution was placed to TT 2 4. 10 drops of 0.5 mercurous nitrate solution was placed to TT 3 5. One drop of cold. 6N HCl solution was added to each TT. When precipitate forms‚ the HCl solution was continue to add in each TT drop by drop until no
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