Chemistry SL Internal Assessment: Enthalpy Change Design Lab Experiment: Reaction of distilled water and solid sodium hydroxide RESEARCH QUESTION How does the heat released during the reaction between distilled water and Group 1 elements (lithium‚ sodium and potassium) vary as one goes down the group? OBJECTIVE The objective of the experiment is to measure the heat change during the reactions with minimal heat loss to the surroundings. MATERIALS The materials to be used in this experiment
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Chemistry design: Fuel energy lab Research question: What is the energy density of cyclohexane‚ and how does it compare to the energy density of normal hexane? Variables: Independent variable – The independent variable in this experiment will be the type of fuel that will be used. This will be either Hexane or Cyclohexane. Each type will be given to us and labelled so it will be quite simple to control this variable. This cannot be measured using any apparatus so the lab assistant must be entrusted
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is the following : { NH – (CH2)5 – CO }n and M = 113 g/mol PD = 60‚000 / 113 = 531 The repeat unit of Nylon 6‚6 ( polyhexamethyleneadipate ) is : { OC(O) – (CH2)4 – CO – NH – (CH2)6 – NH } and M = 226 g/mol PD = 60‚000 / 214 = 265 -a) The polymer formed by the polycondensation of 2 moles of terephtalic acid and 2 moles ethyleneglycol is poly(ethyleneterephtalate) with the following repeat unit : { OC – C6H4 – C(O)O – CH2 – CH2 – O }n and M = 192/2 = 96
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Ase Ruth Alozie Chemistry Take home test May 4‚ 2013 In a laboratory experiment‚ a student reacted 2.8 grams of Fe (s) (steel wool) in excess CuSO4 (aq)‚ according to the following balanced equation: Fe(s) + CuSO4 (aq) -> FeSO4 + Cu(S). When the Fe(s) was completely consumed‚ the
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Deepti The pollution that is caused by organic polymer materials such as plastic on the environment thereby having harmful effect on human being is known as plastic pollution. Plastic mainly can be divided in two broader classifications namely. * Thermoplastics * Thermosetting plastics Both these varieties of plastics are not biodegradable that cannot be acted by micro organisms leading to the breakdown of the molecules. Generally most of the organic materials such as proteins in human
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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EXPERIMENT 2: SYNTHESIS OF ORANGE II (2-NAFTHOL ORANGE OBJECTIVE 1. To produce dye based to the coupling of diazonium. 2. To understand the characteristic of dye orange II. INTRODUCTION The first dye was introduced by William Henry Perkin on 1856. It can be produced by the coupling of diazonium sulfanilic acid with nafthol in alkaline solution.. This was the common method used to produce dye nowadays. In this experiment‚ dye produced was the orange II. Azo compound is compound that contain
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SUPPLEMENTARY MATERIAL (#2000-0709) SOAP FROM NUTMEG: AN INTEGRATED INTRODUCTORY ORGANIC CHEMISTRY LABORATORY EXPERIMENT Marcio C.S. de Mattos and David E. Nicodem Departamento de Química Orgânica‚ Instituto de Química‚ Universidade Federal do Rio de Janeiro‚ Caixa Postal 68545 21945-970‚ Rio de Janeiro‚ Brazil 1) Written material used by students 2) Instructor notes 3) Chemical abstract registry number of chemicals 1) Written material used by students Soaps
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Marisol Camacho AP Chemistry Per. 1-2 10/31/12 Titration Lab Titrations are a very useful method of discovering the amount or concentration of unknown substances. The method is very well suited towards acid-base reactions. Titrations are often used in industry to analyze products to be sold. In this lab‚ standardizations will be done in the first two experiments and then titration analysis in the third. Standardization of a base (NaOH) using a primary standard (KHP) Standardization
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What is Chemistry? Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics‚ by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter‚ particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom‚ as well as the subatomic realm. Really‚ they are two sides of the
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