chemical which is deadly or can cause injuries. For example‚ poisoned arrows‚ boiling tar‚ arsenic smoke and noxious fumes‚ and there are many more. Chemical weapons were first used in 1915. The germen military was the first to release 168 tons of chlorine gas at Ypres and Belgium which caused the death of 5‚000 allied troops. And 2 years after the first development of sulfur mustard was used in same battlefields. In World War 1 the sulfur mustard was the major cause of chemical casualties. During
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Joe Schmoe Period 3 March 8‚ 2013 Lab Report: Empirical Formula of Zinc Chloride (ZnCl) * Purpose The purpose of this experiment was to learn how to determine the empirical formula. Empirical means “based on experimental evidence.” * Experimental Design The reaction that occurred was the reaction of the elements Zinc (Zn) and Chloride (Cl) by mixing a piece(s) of Zinc and 50mL of Hydrochloric Acid (HCl). The amount of Zinc was determined to be between 1.00g and 1.25g. As the reaction
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halogen element Any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F)‚ chlorine (Cl)‚ bromine (Br)‚ iodine (I)‚ astatine (At)‚ and element 117 (temporarily named ununseptium [Uus]). They were given the name halogen‚ from the Greek roots hal- (“salt”) and -gen (“to produce”)‚ because they all produce sodium salts of similar properties‚ of which sodium chloride—table salt‚ or halite—is best known. Because of their great
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Chemistry Investigatory Project To determine minimum amount of Bleaching Powder Required to disinfect different samples of Water. INDEX I. Introduction o Purification of Water o History of Water Purification o Bleaching Powder II. Experiment o Aim o Requirements o Theory o Procedure o Observations o Result o Precautions Introduction 98% of the Earth’s water is present in the oceans with an average salinity of 3.5%. The remainder of the
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bacteria which could cause infections to the people who use them. The disinfectant of choice for most hot tubs is chlorine‚ mainly because of its effectiveness‚ persistence in the water‚ and the familiarity with its properties. Since the 70’s‚ attention has been brought to chlorine disinfection by products and their dangers. These byproducts have been shown to be formed when the free chlorine reacts with NOM (natural organic material) in the water. In this report the focus will be on chloroform‚ one compound
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impacts on one’s health. Chlorine is also generally seen as a useful ion in water. It has been used to purify drinking water by killing microorganisms residing in it since 1904‚ and has seemed to do an excellent job. But recently chlorine in water has been
Free Ion Sodium chloride Sodium
Dana Erika Domingo III – St. Anne STERILIZATION OF WATER USING BLEACHING POWDER A CHEMISTRY INVESTIGATORY PROjECT ANSHUL KUMAR PANDEY XII B [THIS PROJECT LOOKS AT THE TECHNIQUE CALLED STERILIZATION OF WATER USING BLEACHING POWDER WHICH IS USED TO PURIFY WATER AND MAKES IT FIT FOR DRINKING.] INDEX I. Introduction -Need of Water -Purification of Water -Need for a stable purification technique II. Theory -History of Water purification -Bleaching powder
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of solution containing silver ions is placed on a piece of copper metal? What will happen if a drop of solution containing copper ions is placed on a piece of silver metal? Chlorine and bromine are both non-metals (both negative in compounds) and both are used for disinfecting and bleaching. What will happen if chlorine is added to a solution containing bromide ions? What will happen if bromine is added to a solution containing chloride ions? Permanganate ions (MnO4-) react with iron(II) ions
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of the Halogens Goal: To design and carry out an experiment that will give enough data to rank the three halogens from highest to lowest electron affinity. Background: The three aqueous solutions given in this experiment are Iodine‚ Bromine‚ and Chlorine; they are all non-polar and dissolve easily in Hexane which is also non-polar. When there is a color change in a mixture that means that it reacted and that there was a double displacement reaction when there is no change then it didn’t react because
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Pakistan Paper : Pakistan Paper Products Ltd came into existence in 1951. At that time our newly founded country had to import all its paper products which was resulting in the drain of valuable foreign Exchange. Realizing the need of times‚ Mr. Hashim B. Sayeed armed with machinery and technical know how from Germany decided to set up a paper converting unit in Pakistan. In 1962 Pakistan Paper Products became a Private Limited company and then in 1964 it became a Public limited company and was
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