SYNTHESIS AND CHEMISTRY OF K2S2O8 ABSTRACT In this experiment‚ a sample of K2S2O8 was prepared by the electrolysis of an aqueous solution of H2SO4 and K2SO4. The peroxodisulfate anion‚ S2O82-‚ was also observed for its ability to serve as a counterion for precipitation by preparing a copper (II) complex by reacting hydrated copper (II) sulfate with ammonium peroxodisulfate in the presence of pyridine. This same ability‚ coupled with its strong oxidizing ability allowed for stabilization of
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Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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Ch. 1 Fundamentals of Chemistry Subchapter – Stoichiometry and Units 1. An element X forms an oxide with the formula X4O10. If 31 g of X combines with 40 g of oxygen‚ what is the identity of X? A. N B. P C. C D. S Correct Answer: B: P Explanation: We can solve for the atomic mass of X to identify it. The amount in g of X for any amount in g of O is given by: Rearranging the above equation and substituting the given mass of X and O‚ we get: Thus‚ the atomic mass of X
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CHAPTER 5 DISCUSSION 5.1 Analysis of Trace Metal by FAAS Based on the table (4.3 and 4.4) the trace elements was detected by using the flame atomic absorption spectrophotometry analysis. The trace metal can be detected by the FAAS within 15 seconds to 30 seconds of each soil sample. Before the samples were analysis with the FAAS‚ the blank samples were run in the machine for each element that was being analyzed. Their absorbances were read. The mean of each blank was calculated and
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Alumina Yield in the Bayer Process; Past‚ Present and Prospects Edited by TMS (The Minerals‚ Metals & Materials Society)‚ 2007 ALUMINA YIELD IN THE BAYER PROCESS PAST‚ PRESENT AND PROSPECTS Roelof Den Hond1‚ Iwan Hiralal2‚ Ab Rijkeboer3 Alcor Technology‚ Clinckenburgh 10‚ 2343 JH Oegstgeest‚ The Netherlands 2 Hiracon‚ Prinses Irenelaan 2‚ 2273 DD Voorburg‚ The Netherlands 3 Rinalco‚ Helmlaan 16‚ 2244 AZ Wassenaar‚ The Netherlands 1 Keywords: hydrate‚ alumina‚ yield‚ liquor productivity
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A COMPARISON OF ALUMINUM VS. COPPER AS USED IN ELECTRICAL EQUIPMENT Larry Pryor‚ P.E. – Sr. Specification Engineer‚ GE Consumer & Industrial Rick Schlobohm‚ P.E. – Sr. Specification Engineer‚ GE Consumer & Industrial Bill Brownell‚ P.E – Specification Engineer‚ GE Consumer & Industrial ABSTRACT The debate over the pros and cons of aluminum vs. copper conductors has been discussed for many years. Many of the concerns are based on old information and also misinformation. These concerns center on the
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Potter 1 Sherry Potter Mrs. Lasser English 093‚ Section 2318 16 July 2012 How To Build A Coil For Refrigeration Have you ever wondered what keeps the soft drinks cool when you buy one at the convenience store‚ or what keeps the food fresh at restaurants? Without this product called a coil that I assemble at my job‚ drinks‚ dairy products and other produce wouldn’t be kept cool for your convenience. For the first step to build a coil‚ the customer sends an order in‚ then the
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Southport Minerals‚ Inc – some points to remember • Financial architecture (financing program) can transform a negative NPV project into a positive NPV project value addition done by financial manager. • Southport Indonesia (SI)‚ a wholly-owned subsidiary of Southport Minerals‚ entrusted with a responsibility of mining the copper ore at Firstburg‚ Indonesia. o Initial experiments established that Firstburg mine contained 33 million tons of copper ore with an average copper content of 2.5%
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International Journal of Advances in Engineering & Technology‚ July 2011. ©IJAET ISSN: 2231-1963 EFFECT OF PROCESS PARAMETERS ON MECHANICAL PROPERTIES OF THE INVESTMENT CASTINGS PRODUCED BY USING EXPANDABLE POLYSTYRENE PATTERN Nikhil Yadav1 and D. B. Karunakar2 1 2 M.Tech Scholar‚ Mechanical & Industrial Engg. Deptt.‚ IIT Roorkee‚ Roorkee‚ India Assistant Professor‚ Mechanical & Industrial Engg. Deptt.‚ IIT Roorkee‚ Roorkee‚ India ABSTRACT The present study is concerned with the investigation
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Ball mill‚ as a common grinding equipment‚ was widely used in beneficiation‚ construction materials and chemical industries. In terms of grinding way‚ ball mill can be divided into two types：wet type and dry type. And in terms of discharge mode‚ ball mill can be divided into overflow -type and lattice-type. Generally speaking‚ there are three direct ways to improve productivity. before using ball mill‚ use a crusher first. Improve the design of ball mill‚ so the grinding efficiency can be improved
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