"Chlorine" Essays and Research Papers

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Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures. Chlorine is second in reactivity only to fluorine among the halogen elements. Chlorine is a nonmetal. It is estimated that 0.045% of the earth's crust and 1.9% of sea water are chlorine. Chlorine...

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Chlorine in Photosynthesis

Chlorine in Photosynthesis Experiment Abstract Photosynthesis the means by which green plants and different types of organisms use light from the sun to synthesize foods from CO2 and H2O. Chlorine is a chemical element usually in the form of a yellow-green gas and is a strong oxidizing agent. Elodea is a type of aquatic plant also known as waterweed that is native to North America. In the experiment that took place, the effect of chlorine in the presence of photosynthesis...

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Chlorine Lab

Determination of the concentration of chlorine ions Aim: To compare the concentration of chloride ions in pool and tap water respectively. Background: Tap water contains a variety of dissolved ions such as Ca2+, Mg2+, Na+, HCO3- and Cl-. In this experiment we will determine the concentration of the Cl- ions, and comparing it to the concentration found in a sample of pool water. The method used is the standard one for determining the concentration of chloride ions: titration with...

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Determination of Chlorine and Iodine in Water

Determination of Chlorine and Iodine in Water I. Introduction The purpose of this laboratory was to determine the amount of chlorine and iodine in a sample of water by titration using a starch indicator and to standardize a sodium thiosulfate solution. Chlorine is added to municipal water supplies to purify it enough to become safe to drink. Iodine is also added to water when people camp or go hiking in the back country where they cannot bring purified water along. Chlorine and iodine are added...

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Chlorine Zachary Grindle Chemistry 1301 Professor Bott June 24, 2010 Chlorine has an atomic mass of 35.453, atomic number 17, is a member of the halogen family (VIIA), and its symbol is “Cl”. Chlorine contains 17 protons and 18 neutrons in is nucleus. There are two isotopes for chlorine as well; Cl-35 and Cl-37. Chlorine was discovered in 1774 by Swedish chemist Carl Wilhelm Sheele. Sheele came upon chlorine when he put a few drops of hydrochloric acid (HCl), then known as muriatic acid...

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Salt Water Pool Systems vs. Liquid Chlorine Pool Systems

October 2010 Salt Water Pool Systems vs. Liquid Chlorine Pool Systems I currently utilize a salt water pool system called an Aqua Rite System. If you're in the market for a pool, it can be a bit overwhelming to choose a type of system that is right for you. The salt water pool vs. chlorine pool battle has been raging over the last decade, and today, many home owners are building these systems right from the start or converting their old chlorine pools into a salt pool. But what is the real difference...

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Chlorine and Starch Ts Assay

 QUALITY CONTROL LABORATORY Mam Dawn Assay of HCL Aqueous Alkalimetry Direct titration 0.1N NaOH Methyl Red TS HCL + NaOH NaCl + H2O Assay of Diluted H3PO4 Aqueous Alkalimetry Direct titration 0.1N NaOH Thymolphthalein TS H3PO4 + 2NaOH Na2HPO4 + 2H2O Assay of H3BO3 Aqueous Alkalimetry Direct titration 0.1N NaOH Phenolphthalein TS H3BO3 ...

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industrially produced chemical compounds that contain the elements chlorine, fluorine, carbon, and sometimes hydrogen that will break down the protective ozone in the atmosphere. Since CFCs are heavier than air, the process of CFCs reaching the ozone will generally take from two to five years to get into the stratosphere. When CFCs reach the stratosphere, the sun's ultraviolet radiation cause them to break apart. Therefore, the chlorine atoms inside the CFCs are released and will react with ozone, starting...

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Australian Paper Manufacturers

where sodium sulfate was used as the cooking chemical. The kraft process produced a stronger pulp at a faster rate. Bleaching Process After the pulping process, the produced pulp went through the bleaching process. During bleaching, chlorine gas and chlorine dioxin are used to produce a pure white cellulose fiber. Bleached pulp is utilized to make strong and brighter paper that did not discolor. Problem Description – What is the Situation? Chemical processes required large amounts of water...

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releasing chlorine atoms into the atmosphere where they would become active in the destruction of the Ozone. A loss of the stratospheric ozone would result in higher levels of harmful UV-B radiation reaching the earth's surface. Ozone helps to filter out ultraviolet radiation between the wavelengths of 280 and 320 nm, which causes biological damage in plants and animals. Chlorine released from CFC's destroys ozone in catalytic reactions where 100 000 molecules of ozone can be destroyed per chlorine atom...

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