Great Lakes is currently the largest U.S. methyl bromide supplier in the U.S. producing more than 40 million pounds annually at their plants. Great Lakes Chemical ’s involvement in the bromine business has its roots in leaded gasoline. When tetraethyl lead (TEL) was invented as a gasoline additive back in the 1920s‚ it was found to leave a corrosive byproduct in the engine. Great Lakes developed international markets for its products. Globalization of leaded gasoline makes TEL responsible for nearly
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Writing Complete Equations Practice For each of the following problems‚ write complete chemical equations to describe the chemical process taking place. Important note: There are a few physical processes on this sheet – You can’t write an equation for a physical process! 1) When lithium hydroxide pellets are added to a solution of sulfuric acid (dihydrogen sulfate)‚ lithium sulfate and water are formed. 2) When dirty water is boiled for purification purposes‚ the temperature is brought up to
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<b>The Greenhouse Effect</b> <br>The earth’s climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the build up of greenhouse gases primarily carbon dioxide‚ methane‚ and nitrous oxide. <br> <br>Energy from the sun drives the earth’s weather and climate‚ and heats the earth’s surface. This causes the earth to radiate the energy back into space. Atmospheric greenhouse gases (water vapour‚ carbon dioxide‚ and other gases) trap some
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What kings‚ queens‚ princes‚ and princesses do. 34. A name for a person who talks too much. 35. How to order beer in a German restaurant. Pun Answers: There may be better ones out there… 1. copper 2. silver 3. argon 4. iron 5. bromine 6. barium 7. zinc 8. hafnium 9. selenium 10. krypton 11. lead 12. cesium 13. europium 14.
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Discussion The reaction through which 4-mrthaoxyacetophenone is converted to 4-methoxybenzoic acid is a haloform reaction. This reaction involves two distinct stages that occur in the same environment. The first stage occurs through the based-catalyzed halogenation of the ketone that forms a trihalo ketone. First‚ the bleach is transformed into chlorine and hydroxide ions through the following reaction: Then‚ the hydroxyl is able to attack the rather acidic (pKa ~ 20) α-hydrogen of the ketone
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1. A student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202-214°C. Explain. • The sodium carbonate is supposed to be added when extracting the tea leaves with hot water in order to help purify the caffeine. So since the student neglected to add sodium carbonate the caffeine won’t be pure but the student would still be able to recover a large amount of caffeine. The literature melting point
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An oil spill can be defined as an accidental or deliberate dumping of oil or petroleum products into the ocean and its coastal waters‚ bays‚ and harbors‚ or onto land‚ or into rivers or lakes (Holum 1977). Between one and ten million metric tons (one metric ton is 1000 kilograms) of oil are put into the oceans every year. The oil is released‚ most often‚ in small yet consistent doses from tankers‚ industry‚ or on shore waste disposal (Boesh‚ Hersher‚ et al. 1974). Tanker spills cost the United
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fourth edition ORGANIC CHEMISTRY Francis A. Carey University of Virginia Burr Ridge‚ IL Dubuque‚ IA Madison‚ WI New York San Francisco St. Louis Bangkok Bogotá Caracas Lisbon London Madrid Mexico City Milan New Delhi Seoul Singapore Sydney Taipei Toronto | v v Boston | e-Text Main Menu | Textbook Table of Contents | Study Guide Table of Contents McGraw-Hill Higher Education A Division of The McGraw-Hill Companies ORGANIC CHEMISTRY‚ FOURTH EDITION
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Stoichiometry Practice Problems Be sure to balance all equations before you start calculating! Answer key is at the end. 1) Lithium hydroxide reacts with hydrobromic acid to produce lithium bromide and water. If you start with ten grams of lithium hydroxide‚ how many grams of lithium bromide will be produced? 2) Ethylene (C2H4 ) reacts with oxygen gas to produce carbon dioxide and water. If you start with 45 grams of ethylene‚ how many grams of carbon dioxide will be produced?
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Chemistry Salt Analysis Cheatsheet Version 2.0 © 2008 Ankur Banerjee All Rights Reserved. Only important stuff for CBSE Class 12th Chemistry practical syllabus has been included‚ not everything. 2. WE + acidified K2Cr2O7 2 = sol 3 turns green 3. WE + acidified KMnO4 = pink colour of KMnO4 is discharged 4. Sulphide: Colourless gas with a smell of rotten eggs (H2S); turns lead acetate paper black 1. Sodium nitroprusside test: WE + sodium nitroprusside 4 = purple / violet colour 2. Lead acetate
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