* 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?
Premium Chlorine
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‚
Premium Chlorine World War I World War II
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
Premium Chemistry Water Solution
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
Premium Chlorine Magnesium Mole
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
Premium Chlorine Bromine
contains sufficient energy to break the weaker nonpolar chlorine-chlorine bond‚ but it has insufficient energy to break the stronger carbon-hydrogen bond. The fracture of the chlorine molecule leads to the formation of two highly reactive chlorine free radicals (chlorine atoms). A free radical is an atom or group that has a single unshared electron. This initial reaction is called the initiation step of the mechanism. Once the high-energy chlorine free radicals are formed‚ the energy source (UV light
Premium Chlorine Chemical reaction
Electrolysis Electrolysis is the process by which ionic substances are broken down into simpler substances using electricity. During electrolysis‚ metals and gases may form at the electrodes. What is electrolysis? Ionic substances contain charged particles called ions. For example‚ lead bromide contains positively charged lead ions and negatively charged bromide ions. Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric
Premium Electrolysis Chlorine Hydrogen
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
Premium Chlorine Sodium hydroxide Iodine
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
Premium Chlorine Sodium hydroxide Electrolysis
Part Ca)Up until the 1940’s rubber had only been obtained from the latex of rubber trees(Hevea brasiliensis) in plantations situated in tropical areas such as Malaya and Burma. The demand for rubber increased significantly during world war 2 as rubber was needed for tyres of military vehicles and the supply was interrupted by the conflict between the countries. Scientists in Germany and the US developed synthetic polymers that could replace rubber. Even after the war ended the traditional sources
Premium Sodium Sodium chloride Sodium hydroxide