water molecules can incorporate themselves into the ionic crystal structure. Water‚ after all‚ has an oxygen atom with two lone pairs capable of behaving as a Lewis base; it bonds easily to metal ions as evidenced by complex ions in transition metal chemistry. The metal ions and the water molecules are bonded by dative coordinate bonds from the oxygen atom of the water. Therefore‚ Water of crystallization is water that is stoichiometrically bound into a crystal. Crystal salts containing water of crystallization
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Chemistry: Atom structure theories Scientific research is a multistage and complicated process which requires many creative minds to contribute into its creation in order to be efficacious and present solid results. I’ve been given an information sheet apprising ideas of four scientists whose work was very significant in creating the theory about atom structure we recognise nowadays. Guiding Questions: 1 What significant contribution did each of the following people make to present ideas about the
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3090 3090▌ SHORT REVIEW Reaction of Diazo Compounds with Organoboron Compounds short review Huan Li‚ Yan Zhang‚ Jianbo Wang* Reaction of Diazo Compounds with Organoboron Compounds Abstract: The transition-metal-free reactions of diazo compounds with organoboron compounds are reviewed. This type of reaction provides an alternative approach for the formation of C–C‚ C–B‚ and C–Si bonds. Moreover‚ by using tosylhydrazones as diazo compound precursors and boronic acids/esters as the
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Writing an Organic Chemistry Lab Report Components of a Laboratory Notebook The following components should be contained for each experiment‚ along with any additional material required by your instructor. • Title and date • Introduction (purpose‚ reaction) • Physical data (including calculations) • Procedure outline • Data and observations • Discussion of results (conclusions) Prelab Title and Date Give the title of the experiment and the date on which
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Chemical Education Today Especially for High School Teachers by Erica K. Jacobsen Chemistry in My Kitchen The Jacobsen kitchen is an unusual place. The atmosphere is often more “mad scientist” than “gourmet chef ”. Testing JCE Classroom Activity procedures at home brings an eclectic collection of materials to our counters. Our toaster competes for space with a collection of funnels made from 2-liter plastic beverage bottles and rubber stoppers (1). Baking soda from my shelf joins citric acid
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Chemistry 161 Sample Quiz Chapters 1&2 KEY Harold Note: You have already received a significant figures/scientific notation sample quiz. The first ten problems (20 points) will be of exactly the same type. The numbers will be changed to offend the guilty (those who did not use the sample test as a study guide). 1. The term that refers to the reproducibility of a laboratory measurement is a. precision. b. repeatability. c. accuracy. d. exactness. e. the number of S.F. 2. The distance
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05.05 Mixtures and Solutions: Lab Report: Outline Outline: Title The title of the lab should be at the top of the lab report. Background Information and Research 1. Paper chromatography is used to break down colors with using water and the way the colors separate. 2. Doctors can use it to test for alcohol in people’s blood. People can also use it to check for pollutants in the water. Pharmacists can use it to find out how much of each chemical is in each product. 3. I searched
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Year 11 Module 1 – The Chemical Earth The Earth is made up of a large number of different substances: elements‚ compounds & mixtures We can classify elements & compounds as pure substances. These are always HOMOGENEOUS. Mixtures are not pure substances and can be either homogeneous or HETEROGENEOUS. Pure substances have a fixed composition eg copper metal‚ sulfur‚ carbon dioxide (CO2)‚ methane (CH4). Mixtures have variable composition and can also be separated into its components relatively
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1 Ethene may be converted into poly(ethene). What type of reaction is this? (A) Condensation (B) Hydrolysis (C) Oxidation/reduction (D) Polymerisation 2001:1 1 2 You have carried out a first-hand investigation to compare the reactivity of an alkene with its corresponding alkane. (a) State the name of the alkene. 2002:16(a) 1 (b) Outline a procedure to compare the reactivity of this alkene with its corresponding alkane. 2002:16(b) 2 (c) Describe the
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NORTHERN CARIBBEAN UNIVERSITY DEPARTMENT OF BIOLOGY‚ CHEMISTRY and ENVIRONMENTAL SCIENCE LABORATORY MANUAL Instructor: Dr. M. Wilson CHEM401: BIOCHEMISTRY for NURSES Prepared by: Oreane Collins CHEMISTRY LABORATORY REGULATIONS AND SAFETY PRECAUTIONS Reference: http://www.sciencebyjones.com/safety_rules.htm Thanks to the Flinn Scientific Safety Rules for much of the below. General Guidelines 1. Conduct yourself in a responsible manner at all times
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