* 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 common?
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and there’s a bit of history to show it. The German Army first used chlorine gas cylinders and sulfur fumes during the First World War in April 1915 against the French Army at Ypres (Chlorine Gas‚ 1915). During that moment in history‚ the use of chemical weapons was non-existent‚ but the German Army had perfectly planned their attack to break down the French resistance with a big surprise. The German Army dispersed the chlorine gas in a fashion similar to a tactical grenade i.e. a smoke grenade‚
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carbonate out utilising the common-ion effect. 5. Pre-chlorination – In many plants the incoming water was chlorinated to minimise the growth of fouling organisms on the pipe-work and tanks. Because of the potential adverse quality effects (see chlorine below)‚ this has largely been discontinued.[citation needed] [edit]pH adjustment Distilled water has a pH of 7 (neither alkaline nor acidic) and sea water has an average pH of 8.3 (slightly alkaline). If the water is acidic (lower than 7)‚ lime
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Metals and Non-metals Elements are divided mainly into two groups on the basis of physical and chemical properties – Metal and Non-metal. Metals: Part - I Physical Properties of Metals:- Hardness:- Most of the metals are hard‚ except alkali metals‚ such as sodium‚ potassium‚ lithium‚ etc. Sodium‚ potassium‚ lithium etc. are very soft metals‚ these can be cut using knife. Strength:- Most of the metals are strong and have high tensile strength. Because of this big structures are made using metals
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always tell you not to touch bleach because it harms your skin? Since we’re still young‚ why not understand it earlier? Bleach has two forms: chlorine bleach and non-chlorine bleach. Chlorine bleaches work faster and more effectively than non-chlorine bleaches‚ which is why it became so popular. So when people say bleach‚ they usually mean chlorine bleaches. Now bleach - in scientific terms - is a kind of catalyst. A catalyst is a chemical that increases the reaction rate of a chemical reaction
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know the content of chlorine in a particular salt by dissolving it in water‚ than extracting it through precipitation. This method is based on quantitative isolation of pure chlorine on both sides of the compound which we can achieve if enough data is available for calculation. We know that our dissolved unknown salt contains chlorine‚ a halide‚ which can be precipitated effectively using silver nitrate. The positive Silver ions in the Silver nitrate ions react with the chlorine in in this net ionic
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cooling) second weighing = 45.49g 5. Mass of Magnesium Chloride: { 4} – { 1 } = 0.41g 6. Mass of chlorine in Magnesium Chloride: { 5 } – { 3 } = 0.32g 7. Moles of Magnesium: 0.09g x 1mol = 0.004mol 24.31g 8. Moles of Chlorine: 0.32g x 1mol = 0.009mol 35.45g 9. Moles of Magnesium divided
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does temperature effect the concentration of chlorate ions in bleach?’ Aim: The aim of this experiment was to investigate the optimum temperature storage conditions of bleach’s stored at different temperatures. Introduction: Chlorine bleaches are made by dissolving chlorine in sodium hydroxide solution. They have a number of uses as they are used to remove colors‚ whiten or disinfectant via oxidation. Many bleaches have strong bactericidal properties‚ and are used for disinfecting and sterilizing
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Science Mrs Trennor Research Assignment: The Chloralkali Industry The chloralkali process is responsible for the production of chlorine gas (Cl2)‚ sodium hydroxide (NaOH) hence the name chloralkali. The process is also responsible for the production of hydrogen gas (H2). These three substances are used to make products that are essential to people’s lives. The chloralkali process
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means that the required heat energy to reach the boiling point increases. Fluorine has a significantly lower boiling point than the rest of the halides because it has a set of electrons that produces repulsion between them. This weakens the bond. Chlorine has a boiling point of -34.6°C because its covalent bond is stronger than fluorine’s and so on until Iodine which has a boiling point of 184.0°C because it has many more energy levels which requires more heat energy. As the intermolecular and the
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