of this experiment was to determine the speed at which a reaction took place between an iodine and hydrogen peroxide solution. In addition to a change in concentration‚ a change in temperature and a catalyst variable was also introduced to conclude whether or not their presence affected the overall speed of the reaction. In order to determine the effects of these variables‚ several iodine and hydrogen peroxide reactions were prepared‚ (all at varying temperatures‚ volumes‚ and concentrations)‚ and
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For many years Hydrogen peroxide was widely used for disinfecting‚ sterilization and its antiseptic properties‚ it is cheap and easily available OTC at any drug store or grocery store. “This readily available oxidant is rapidly converted to the highly reactive hydroxyl radical that damages an array of cellular components” (Atiyeh‚ Dibo‚ and Hayek‚ 2009). “The Medicines and Healthcare Products Regulatory Agency (MHRA‚ 2014). Have issued a warning regarding its use in surgery and in deep and large
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Solar‚ Hydrogen and Fuel Cell : Current & Future Wan Nadia Kamaruddin‚ Azman Zainal Abidin‚ Noorly Akmar Ramli Yuzlina Mohd Yusop‚ Siti Indati Mustapa Policy Analysis and Research Management Pusat Tenaga Malaysia Level 8‚ Bagunan Sapura @ MINES 7 Jalan Tasik‚ The Mines Resort City 43300 Seri Kembangan Selangor‚ Malaysia http://www.ptm.org.my Abstract In its quest to become a developed country by year 2020‚ Malaysia fully subscribes to the concept of sustainable development. The
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procedures: 1. Hydrogen G. When hydrogen gas comes in close contact with fire‚ it generates a loud noise similar to a popped piece of popcorn and it blows out the flame. 2. Oxygen B. When manganese reacts with H2O2 small bubbles form around the pieces of manganese and carbonates the whole solution. E. When I put the glowing toothpick in the oxygen gas it caused the toothpick to light up instantly for a short period and then made it glow brighter red. 3. Hydrogen and Oxygen Mixture
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hydrochloric acid In the lab‚ zinc granules react fairly slowly with dilute hydrochloric acid‚ but much faster if the acid is concentrated. The catalytic decomposition of hydrogen peroxide Solid manganese(IV) oxide is often used as a catalyst in this reaction. Oxygen is given off much faster if the hydrogen peroxide is concentrated than if it is dilute. The reaction between sodium thiosulphate solution and hydrochloric acid This is a
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DNA REPLICATION WHAT IS DNA? DNA is a molecule that has a repeating chain of identical five-carbon sugars (polymers) linked together from head to tail. It is composed of four ring shaped organic bases (nucleotides) which are Adenine (A)‚ Guanine (G)‚ Cytosine (C) and Thymine (T). It has a double helix shape and contains the sugar component deoxyribose. THE PROCESS OF DNA REPLICATION How DNA replicates is quite a simple process. First‚ a DNA molecule is "unzipped". In other words‚ it
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Decomposition of Hydrogen Peroxide by Potassium Iodide Brief Description: Two solutions are mixed resulting in an eruption of foam resembling a huge stream of toothpaste. This is the classic “Elephant Toothpaste” reaction. Purpose/Goal: Procedure presents an example of a catalyzed reaction. Explanation of Experiment: The rapid evolution of oxygen gas is produced by the following reaction: 2 H2O2 (aq) = 2 H2O (l) + O2 (g) + heat The decomposition of hydrogen peroxide in the presence
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Boiling point Density Ionization energy Abundance in Earth Year of discovery Hebrew Name List of Periodic Table Elements Sorted by Atomic Number Click a column title‚ such as Symbol‚ to sort the table by that item. No. Atomic Weight Name Sym. M.P. ( °C ) B.P. ( °C ) Density* (g/cm3) Earth crust (%)* Discovery (Year) Group* Electron configuration Ionization energy (eV) 1 1.0079 Hydrogen H -259 -253 0.09 0.14 1776 1 1s1 13.5984 2 4.0026 Helium He -272 -269 0.18 1895 18 1s2 24.5874 3 6.941 Lithium
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Oxygen (O) Human beings obtain this element from the air. It enters a person’s bloodstream through the lungs. The blood carries oxygen to the cells of the body. In the cells‚ oxygen combines with chemicals obtained from food. Energy produced during this process makes it possible for each cell to perform its function in the body. Also‚ oxygen atoms are present in water and water is essential to all life. It is present in many organic compounds. While oxygen is necessary for life‚ oxygen as ozone
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Hydrogen Concentration Sensor Selection for the Renewable Energy Vehicle School of Mechanical Engineering‚ The University of Western Australia ABSTRACT: This paper discusses the selection of a hydrogen concentration sensor for the use in the University of Western Australia’s Renewable Energy Vehicle (REV). Prior to selecting a sensor‚ it is important to consider the available sensing methods and the specific properties of the measurand‚ hydrogen. The selection process leading up to the purchase
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