Aim: determine the mass of calcium carbonate in chicken eggshells and hence its percentage by mass Apparatus Uncertainty 25.00 cm3 pipette ± 0.03 cm3 50.00 cm3 burette ± 0.05 cm3 250.0 cm3 volumetric flask ± 0.3 cm3 50.0 cm3 measuring cylinder ± 0.5 cm3 Electronic balance ± 0.01 g Uncertainty of apparatus Measurement Mass of eggshell = 3.15 ± 0.01 g Volume of HCl added = 50.00 ± 0.5 〖cm〗^3 Volume of solution = 250.0 ± 0.3 〖cm〗^3 Volume of NaOH pipetted = 25.00 ± 0.03 〖cm〗^3
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Curled Metal Inc.-Engineered Products division Overview Curled Metal Inc. (CMI) used to manufacture custom-fabricated components for chemical process filtration and other highly technical applications. After CMI developed Slip-Seal‚ the company had grown rapidly over the past decade. However‚ company management wanted to diversify away from its heavy reliance on Slip-Seal. Thus‚ management began to examine their new product‚ a cushion pad‚ which is a key part of the process for driving piles
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Materials Science and Engineering C 19 Ž2002. 119–123 www.elsevier.comrlocatermsec Metal nanoparticles for the production of carbon nanotube composite materials by decomposition of different carbon sources A. Weidenkaff a‚ ) ‚ S.G. Ebbinghaus a ‚ Ph. Mauron b‚ A. Reller a ‚ Y. Zhang a ‚ A. Zuttel b ¨ a Institute of Solid State Chemistry‚ UniÕersitat Augsburg‚ UniÕersitatsstr. 1‚ D-86159 Augsburg‚ Germany ¨ ¨ b Physics Department‚ UniÕersite de Fribourg‚ Perolles‚ CH-1700 Fribourg‚
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THICKNESS OF ZINC ON A PIECE OF GALVANIZED METAL Department of Biology‚ College of Science‚ University of the Philippines Baguio ABSTRACT The experiment was performed to be able to determine the thickness of zinc on a piece of galvanized metal. It also aimed for the students to be introduced to the reactivates of metals with acids as well as for them to develop some feeling for the size of an atom. In determining the thickness of the zinc coating on the metal‚ students‚ knowing the density of zinc
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An investigation in to the rate of reaction Plan: I am going to investigate the rate of reaction. The reaction I will be using is: Calcium Carbonate + Hydrochloric acid ---- Calcium Chloride + water + carbon dioxide. CaCO3 + 2HCl ---- CaCl +H2O + CO2 Measurements and Variables: The variables I have chosen to change is strength of the hydrochloric acid which will be 1 mole‚ 0.7 mole‚ 0.5 mole‚ 0.3 mole and 0.1 mole some variable I will not be using are temperature‚ mass‚ density. The measurements
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Biochemical Engineering Journal 36 (2007) 174–181 Removal of heavy metal from industrial wastewater using modified activated coconut shell carbon O.S. Amuda a‚∗ ‚ A.A. Giwa a ‚ I.A. Bello b Environmental/Analytical Chemistry Unit‚ Department of Pure and Applied Chemistry‚ Ladoke Akintola University of Technology‚ Ogbomoso 210001‚ Nigeria b Physical Chemistry Unit‚ Department of Pure and Applied Chemistry‚ Ladoke Akintola University of Technology‚ Ogbomoso 210001‚ Nigeria Received 1 September
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The Distinction between Ferrous and Non-ferrous Metals Metals can be classified as either ferrous or non-ferrous. So what is the difference between ferrous and non-ferrous metals? It is the most frequently asked questions. Shortly speaking‚ ferrous metals and alloys contain iron while non-ferrous materials do not. Ferrous metals include mild steel‚ carbon steel‚ stainless steel‚ cast iron‚ and wrought iron. These metals are primarily used for their tensile strength and durability‚ especially
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What is Heavy Metal? Heavy metal‚ also known as “metal”‚ was born in the late 1960s. Derived from rock music‚ metal is a heavier variant that is known for its more “aggressive” sound. Growing its fan base was easy‚ as it retained the basic characteristics of rock and added new and different characteristics. Metal took off in the 1970s as more and more people were attracted to its new and interesting sound. According to hardradio.com‚ the first occurrence of heavy metal music appeared in 1967. Alice
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The Enthalpy Change of the Decomposition of Calcium Carbonate _INTRODUCTION_ RESEARCH QUESTION: What is the enthalpy change of the decomposition of calcium carbonate? BACKGROUND: Enthalpy in chemistry can be thought of as the energy contained within the bonds‚ or the internal energy‚ but it is not heat and you can only measure changes in it. When bond bonds break in the reactants energy is given off‚ when bonds form‚ energy is absorbed. If the energy absorbed is less than the energy released
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advantages‚ disadvantages‚ legal‚ financial and ethical considerations involved in the various alternatives. The purpose of this memo is to outline three possible decision alternatives to address the problem of small lead traces to contents of metal whistles produced by a U.S toy company due for shipment to South America; by discussing the methods for the selection of decision alternatives‚ the advantages‚ disadvantages‚ ethical considerations‚ financial and legal prospective of the each decisions
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