Chemistry Life in Daily Life

2966 WordsApr 3, 201212 Pages
Assignment # 1 Chemistry Submitted to: dr. shamshad Submitted by: sheeraz ahmed Rg# 10-nust-be-me-83 Date: 11/4/2011 Table of Context * Introduction * Daily Life Applications * Fluorine * Introduction * Properties And Uses Of Fluorine * Fluoridation Of Water * Chlorofluorocarbons * Chlorine * Introduction * Uses Of Chlorine * Chlorine And Organic Compounds * Bromine * Introduction * Halogen Lamps * Iodine * Introduction * Uses And Applications * Astatine * Introduction * Uses And Applications Introduction & daily life applications of halogens INTRODUCTION: * Table salt, bleach, fluoride in toothpaste, chlorine in swimming pools—what do all of these have in…show more content…
Fluoride had meanwhile gained application in toothpastes. Colgate took the lead, introducing "stannous fluoride" in 1955. Three years later, the company launched a memorable advertising campaign with commercials in which a little girl showed her mother a "report card" from the dentist and announced "Look, Ma! No cavities!" Within a few years, virtually all brands of toothpaste used fluoride; however, the use of fluoride in drinking water remained controversial. As late as 1993, in fact, the issue of fluoridation remained heated enough to spawn a study by the U.S. National Research Council. The council found some improvement in dental health, but not as large as had been claimed by early proponents of fluoridation. Furthermore, this improvement could be explained by reference to a number of other factors, including fluoride in toothpastes and a generally heightened awareness of dental health among the U.S. populace. Chlorofluorocarbons : Another controversial application of fluorine is its use, along with chlorine and carbon, in chlorofluorocarbons. As noted above, CFCs have been used in refrigerants and propellants; another application is as a blowing agent for polyurethane foam. This continued for several decades, but in the 1980s, environmentalists became concerned over depletion of the ozone layer high in Earth's
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