Title: Observation of Macroscopic Chemical Changes‚ Alice Kimbrell‚ Chemistry 101-DS01:74589‚ 5/31/2013. Purpose: In this lab‚ I will observe macroscopic changes that occur when mixing together certain chemicals and household cleaners. The mixing of the chemicals provided with each other and with acid/base indicators demonstrates how matter can change‚ and how chemistry can be seen with the naked eye. By mixing household cleaners with an acid/base indicator I hope to demonstrate how these
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Most people choose hydrogen peroxide over rubbing alcohol to clean a wound since hydrogen peroxide doesn’t burn. However‚ when hydrogen peroxide is treated on deeper wounds into the flesh‚ it can pose numerous problems to cellular health. When hydrogen peroxide is used correctly to clean wounds‚ it becomes an oxidizer and can be used as a disinfectant to prevent infections. However when used incorrectly‚ hydrogen peroxide can cause oxidative stress on cells. This essentially means that there is an
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Write your name here Surname Other names Edexcel Certificate Edexcel International GCSE Centre Number Candidate Number Chemistry Unit: KCH0/4CH0 Science (Double Award) KSC0/4SC0 Paper: 1C Monday 14 January 2013 – Morning Time: 2 hours Paper Reference KCH0/1C 4CH0/1C KSC0/1C 4SC0/1C You must have: Calculator Ruler Total Marks Instructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name‚ centre number and candidate
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Edexel IGCSE Chemistry Revision Notes IGCSE Chemistry Triple Award Revision Guide Topic Introduction to chemistry Atomic Structure Structure and Bonding – Ionic Bonding Structure and Bonding – Covalent and Metallic Bonding Organic Chemistry - Alkanes Organic Chemistry – Alkenes / Addition Polymerisation Organic Chemistry – Alcohols / Condensation Polymerisation Calculations Periodic Table Reactivity Series and Metal Extraction Electrolysis Energetics Acids‚ Bases‚ Salts and Neutralisation Preparing
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Introduction Whether it be the 4th of July‚ a day at Disneyland‚ or Chinese New Year‚ fireworks can be used to appeal to people of all ages‚ genders‚ and races. These low explosive pyrotechnic devices are primarily used for aesthetic or entertainment purposes. Fireworks come in various forms‚ including sparklers‚ firecrackers‚ basic fireworks‚ and ariel or display fireworks. Those who watch firework displays find that those can be broken into smaller categories by four primary effects. These effects
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absorbance of light. Fructose is the sugar found in fruit. It is a monosaccaride‚ and is a reducing sugar because it acts as a reductant in chemical reactions. This can be seen in the Benedict’s test where the fructose in the fruit juice will reduce CuSO4 to CuO when heated. Cu 2+ → Cu + The following table indicates approximate nutritional values for each of the three fruits to be tested: Energy / kJ Water / % Sugar / mg* Sugar Concentration / mg cm3 -1 Red Grapefruit 128 90 66 0.73
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Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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GROUP No.: | DATE: 02/14/13 | | NAME: | | EXPERIMENT No.25BACILLUS: Diagnostic Tests | | ASCOLI’S THERMOPRECIPITIN TEST Purpose: used to identify anthrax bacilli in animal hides and meat. Principle: This test was designed to detect B. anthracis antigens in the tissues of animals being utilized in animal by-products and thereby to reveal when these products contained ingredients originating from animals that had died of anthrax. The thermostable antigens involved are common to other
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Determination of an Electrochemical Series In electrochemistry‚ a voltaic cell is a specially prepared system in which an oxidation-reduction reaction occurs spontaneously. This spontaneous reaction produces an easily measured electrical potential which has a positive value. Voltaic cells have a variety of uses and you commonly refer to them as a “battery”. Half-cells are normally produced by placing a piece of metal into a solution containing a cation of the metal (e.g.‚ Cu metal in a solution
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GAS LAWS Properties of Gases Gases expand into any available volume • gas molecules escape from open containers. Gases are completely miscible • once mixed they will not spontaneously separate. Gases are described in terms of T‚ P‚ V and n Volume‚ Amount and Temperature • A gas expands uniformly to fill the container in which it is placed – The volume of the container is the volume of the gas – Volume may be in liters‚ mL‚ or cm3 • The temperature of a gas must be indicated
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