Chemical Equilibrium- Le Chatelier’s Principle; Chemistry 0993 By Amanuel asgodom For Dharinee Doobur-Choytun Partner cherry November 28‚ 2013 Purpose: To observe and record Le Chatelier’s Principle on how temperature & concentration change affects in a reaction. Apparatus and materials; See on chemistry lab manual 0993e chan henry j johnstone- g pawelchack Vancouver community college. Page 52… le chateliers principle. See the detail from the le chateliers principle
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Solubility as a Property of Matter A Lab of Chemicals‚ Chromatography‚ and Crime! Chemistry is a natural science that deals with the composition of matter and the changes it undergoes. At crime scenes‚ investigators often find unknown materials that need to be identified. If an unknown material is a mixture‚ an investigator may want to know one or two things about it: What are the ingredients of the mixture? Is the mixture found at the scene the same as a known mixture? A mixture is a collection
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World War 1 each side was always desperately looking the next way to get ahead.The first deadly chemicals were found in 1914 used by the Germans. These horrific gases had deadly side effects from extreme blistering‚ to intense coughing fits. Theses gases were as effective as a weapon could get‚ but are they humane? People died brutally immense pain because of these gasses. At the end of World War I chemical weapons had changed the face of the war and raise the death count by thousands. In August 1914
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by the term ‘chemical change’. A chemical change is where the Atoms in one or more substances are rearranged to
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Finding the Ratio of Moles of Reactants in a Chemical Reaction Purpose: The goal of the lab is to determine the mole ratio of two reactants in a chemical reaction (AgNO3 and K2CrO4). However‚ the formulas for the products are unknown. Introduction: When determining the molar ratio of a chemical equation‚ usually the formulas of the reactants and the products are known. With that information‚ it is particularly easy to determine the ratio. However‚ since the products and the formulas for
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experiment is to differentiate between a physical change and a chemical change. A physical change includes a change in the material without affecting its composition‚ such as the physical state change. However‚ a chemical change includes the change in the composition of the substance. The change in color‚ formation of a gas or a solid product‚ and the production of energy are the evidences of a chemical reaction‚ thus‚ of a chemical change. Materials Crucible tongs Evaporating dish
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HOLY TRINITY SCHOOL 4U BIOLOGY 2012/2013 Independent Study Project: Homeostasis‚ Maintaining Balance In these investigations‚ students will be involved in the initiating and planning of a scientific study. You will be performing library research‚ then designing and implementing a study in which you will record‚ analyze‚ interpret‚ and communicate your research and data. A formal written report as well as an oral presentation of this information to your peers will be required. Students will
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2013 Palmitos‚ Isabel Experiment # 2 chemical changes I. INTRODUCTION Chemical changes occur when a substance combines with another to form a new substance whether by combination reaction‚ combustion reaction‚ decomposition reaction and etc. These changes can be observed by evolutions of gas‚ appearance or disappearance of a precipitate‚ evolution or absorption of heat or even change in color. This experiment aims to observe the different chemical changes copper undergoes in different conditions
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A MANIFESTO DELIVERED BY MR.AFFUL CHRISTOPHER ON THE 4TH OF FEBUARY 2013 AT THE SCHOOL ASSEMBLY HALL AS AN ASPIRANT FOR THE POSITION OF COMPOUND PREFECT Mr. Chairman‚ Honorable Headmaster‚ Members of Staff‚ Co-aspirant‚ Out-going Prefect‚ Fellow Student‚ Ladies and Gentlemen. Good day. I am very grateful for being given the chance to read my manifesto to you‚ as an aspirant for the position of compound prefect. I am Afful Christopher‚ a second year art student of this great institution. I am before
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Physical and Chemical Properties Toby Orme-Lab 4 Solubility or Reaction Substance Name Color Odor Effect of Heat Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver N/A N/A Non soluble Bubbles Basic Hot/fizz N/A Cu Copper N/A Purple then turned black Non soluble N/A N/A N/A N/A Zn Silver N/A N/A Non Soluble N/A N/A Vaporized and fizzed N/A MgO White N/A Omits gas Hazy mix Boiled Rapidly Basic Got hot and fizzed Became thick or pasty CuCO3 Green N/A Turned black Hazy Green Became powdery
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